We were thrilled to see how well our Mexican bear grass, Nolina hibernica fared through our recent cold. We had lost this ten times previously, and were close to giving up, but decided to plant this one in a partially shaded site. Previously, we had only planted these in full sun, where they thrived except during cold winters. By growing this partially under shade, it reduces the amount of cooling on cold nights by having a tree canopy nearby. This 8 year old specimen has a way to go before it reaches its potential mature height of 20′. Fingers crossed.
In 2014, Plant Delights introduced this amazing, wild collected mondo grass, which we think is one of the coolest ophiopgons we’ve ever grown. This Darrell Probst collection from China has formed a 20″ tall x 4′ wide mound of foliage. This image was taken in the garden this week after our 11 degree F freeze, and is looking absolutely fabulous. Although it keys out to Ophiopogon japonicus, it doesn’t phenotypically (what it looks like) that species. We’re pretty sure it represents a new undescribed species.
We love the texture, both in the woodland garden and in half day full sun. Although it’s winter hardy throughout Zone 6, it was one of the worst selling plants we ever offered. Sometimes we just want to throw our hands up trying to figure out why people don’t purchase some of these amazing plants.
One of the stars of our late summer/early fall garden has been our selection of Chrysopsis mariana ‘Little Miss Sunshine’. We made this roadside collection of this East Coast native in 2020 in neighboring Orange County, NC, unsure of what we had collected, but loving the purple stems of this clone. This planting in our rock garden has produced an amazing 18″ tall x 2′ wide specimen that glows for months. Dry soils and at least half day sun are the keys to success. We’ll start propagating this showy, clumping native perennial in spring. Winter hardiness is Zone 4-8.
Carex ‘Willow the Wisp’ is one of Zac Hill’s amazing collections from nearby Willow Springs, NC. This is a widespread native, naturally ranging from Michigan south to Florida and west to Texas. We love the appearance of a head of green hair…minus the head. In the wild, this selection of Carex leptalea var. harperi thrives in wet mucky swamps, like the story of Will-o’-the Wisp. We planted this in similar conditions in a seep at JLBG, where it has made this stunning specimen. Any plant that looks this good in October is undoubtedly destined for a future catalog.
If you think you know mahonias, then check out this little-known species, flowering now at JLBG. Mahonia nitens is endemic to Guizhou and Sichuan, China. This is a form selected by Japanese plant explorer, Mikinori Ogisu. For us, the plant matures our at 4′ tall x 5′ wide, with flowers that appear orange, due to the color of the flower buds. Hardiness is unknown north of Zone 7b.
The false yew, Cephalotaxus harringtonia ‘Gold Dragon’ is looking particularly lovely during the fall season here at JLBG. This is one of our six year old specimens. We find that half day sun seems to bring out the best color without foliar burn. Hardiness is Zone 6a-9b.
We have a fairly decent collection of conifers at JLBG, but one that has really caught our eye is Chamaecyparis pisifera ‘Baby Blue Ice’. This charming dwarf was found in 1998 by Oregon nurseryman Larry Stanley as a sport of Chamaecyparis pisifera ‘Baby Blue’. Our oldest plants are now four years old and are 3′ tall x 2′ wide. The naturally dense growth and conical shape give the impression that it’s been sheared, which is not the case.
Word on the street is that it should mature around 6′ tall, but with newly discovered plants like these, we take those size predictions with a large grain of salt. Undoubtedly, mature size in the Southeast US will be quite different than in the heat-deprived Pacific Northwest.
Flowering today at JLBG is Liriope gigantea ‘Lynn Lowrey’. This selection is named after the late Texas plantsman, and is the largest form of the largest species of monkey grass. This tight clump former can reach 3.5′ tall, when happy. The flowers don’t emerge until early September, making it one of the latest liriope species to flower. We offered this a couple of times, but so few people purchased it, we dumped out most of the crop and planted the rest around the garden. We think it’s pretty darn cool. Winter hardiness is at least Zone 7a-9b.
The genus rhodophiala is in a state of flux. Some taxonomists believe the genus actually doesn’t exist and should be merged with rain lilies, while others consider it a perfectly valid genus with 27 species. Oh, the joys of taxonomy. To most gardeners, the genus rhodophiala are simply dwarf hippeastrum (horticultural amaryllis), the most commonly grown of which is the South American Rhodophiala bifida, which ranges natively from Southern Brazil into adjacent Argentina.
Rhodophiala bifida starts flowering for us in mid-August, alongside the emerging foliage. Most Rhodophiala on the market are the clonal Rhodophiala bifida ‘Hill Country Red’, brought to the US by German born Texan botanist, Peter Henry Oberwetter circa 1890. This clone is virtually sterile when grown alone, but will produce viable seed when grown adjacent to another clone.
Below is the clone ‘Hill Country Red’, followed by some of our selected seedlings, all photographed here at JLBG over the last couple of weeks. The best conditions are full sun to light filtered shade, and average moisture to dry soil.
Rhodophiala bifida ‘Harry Hay’ seems to be the only named clonal selection grown in the UK. We imported this during our 2020 UK trip.
Rhodophiala bifida ‘Carmencita’ is our first named introduction, released in 2017.
Rhodophiala ‘Red Waves’ is our 2nd named selection, not yet introduced
The rest of the clones below are our selected seedlings still under evaluation
Below are two fascinating plants from our breeding. The first is a cross of Rhodophiala bifida x Lycoris longituba. In theory, this bi-generic cross shouldn’t work, but the flower arrangement sure resembles a lycoris more than a rhodophiala.
This cross is of Rhodophiala bifida x Sprekelia formosissima is another impossible bi-generic cross. Notice the three petals are one size, and the other three petals are larger. We’ve never heard of this happening in rhodophiala, so perhaps we’re on to something.
The only other Rhodophiala species, which we’ve had any luck with is the Chilean Rhodophiala chilense. Below are two forms, both of which flowered this spring.
We’ve just enjoyed peak surprise lily week at JLBG. The lycoris season starts for us in early July and continues into early October, but the last two weeks of August is peak bloom. Below are a few samples from the last few weeks.
The first two image are our field trials, where lycoris are studied, photographed, and evaluated for possible introduction.
There are only 6 lycoris species (despite what you read on-line). Four of these have foliage produced in spring, and two have foliage that emerges in fall.
Lycoris longituba is a spring-leafed species with flowers that range from white to pink, to yellow/orange.
Lycoris chinensis is a spring-leafed species with bright gold/orange-gold flowers. There is little variability in the color of this species.
Lycoris sprengeri, whose foliage emerges in spring, is the only pink flowered species, almost always with a blue petal tip.
Lycoris sanguinea is the fourth spring-leafed species, but one that performs quite poorly in our climate, and consequently rarely flowers for us.
Lycoris radiata is one of only two fall-leaved species. Lycoris radiata var. pumila is the fertile form, while Lycoriis radiata var. radiata is sterile and consequently never sets seed. There is little variability with regard to color, but there is great variability with regard to bloom time. Lycoris radiata is the earliest lycoris to flower in July and the last lycoris to flower in October.
Lycoris aurea is the only other fall-leaved species. In appearance, it is indistinguishable from the spring-leafed Lycoris chinensis, except that the foliage emerges six months earler.
Lycoris traubii is a hotly debated plant in taxonomic circles. Occurring only in Taiwan, some taxonomists insist on it being its own species, while other simply find it a form of the mainland Chinese Lycoris aurea…similar to the debate about Taiwan’s political status. Until we see other evidence, we view it as a form of Lycoris aurea.
All other lycoris are hybrids. Sadly, botanists continue to name new lycoris species, but after having grown each, we have yet to find any that are anything more than a previously named naturally occurring hybrid. Below are a few of the validly named hybrids.
Lycoris x albiflora is a group of naturally occurring crosses between the two fall-leafed species, Lycoris aurea and Lycoris radiata. Most emerge yellow and age to pink-blushed. If these hybrids cross back to the Lycoris radiata parent, the hybrids take on lovely orange shades.
Lycoris x caldwellii, named after the late Lycoris breeder, Sam Caldwell, is a hybrid between the spring-leafed species, Lycoris longituba and Lycoris chinensis.
Crosses between the fall-foliaged Lycoris radiata and the spring-leafed Lycoris sprengeri have been made more than any other interspecific lycoris cross. We currently grow over 200 clones of this hybrid, with flower colors that range from solid pink to bright red, and everything in between. Backcrosses onto one parent or the other influence the flower color expression.
Lycoris x rosensis is a hybrid between the fall-leafed hybrid above, Lycoris x rosea and the spring-leafed Lycoris chinensis.
Lycoris x sprengensis is a cross between the spring-leafed Lycoris sprengeri and the spring-leafed Lycoris chinensis. The flower buds almost all show a blue tip, whose color disappears as the flowers age.
Lycoris x straminea is very similar in appearance to Lycoris x albiflora. The only difference between the two is that one parent of Lycoris x straminea is the spring-leafed Lycoris chinensis instead of the fall-leafed Lycoris aurea. Interestingly, Lycoris x straminea is fertile, while Lycoris x albiflora is not. Because Lycoris x straminea is fertile, it can be crossed back onto its Lycoris radiata parent, created some stunning orange-hued flowers
Most Lycoris x straminea clones open pure yellow, and acquire a reddish-orange blush as they age, from the Lycoris radiata parent. You can see an example below with two images taken 2 days apart.
Lycoris ‘Peppermint’ is an old passalong hybrid of two spring-flowered species, known and sold as Lycoris x incarnata…a cross of Lycoris longituba and Lycoris sprengeri. Our studies, however have shown that this plant could not have arisen from such a cross. In hybrids between a spring and fall-leafed species, the offspring always has foliage that emerges in early fall (September, October). The foliage on this emerges in late November, and the only way this could happen if the hybrid included 2 spring species and 1 fall species.
The only species that could provide the red color is the fall-foliage Lycoris radiata and the only species which could contribute the white color is Lycoris longituba. The other parent must be a spring-foliage species, so the only option is Lycoris sprengeri. We now feel confident that this hybrid could only have occurred with a cross of Lycoris sprengeri x radiata x longituba. We call these hybrids, Lycoris x longitosea (longituba x rosea).
To determine which lycoris will thrive in your hardiness zone, simply look at when the foliage emerges. The fall-foliage species/hybrid are best from Zone 7b and south, although some will grow in Zone 7a. The spring-foliaged species/hybrids should be fine in Zone 5, and possibly as far north as Zone 3.
While lycoris will grow and flower in sun, they perform far better in filtered deciduous shade, where the foliage will have some protection from the ravages of winter. The amount of light they receive in summer when they have no foliage isn’t really relevant to their performance.
Re-appropriating a line from the late Buck Owens, it’s crinum time again. Crinum lilies begin their flowering season in our climate around April 1 (frost permitting). Some bloom for a short number of weeks, while other rebloom for months. Depending on the genetics, some crinum hybrids start flowering in spring, some in summer, and others in fall, and a few flower during the entire growing season.
Crinum ‘High on Peppermint’ is one of our newer named hybrids, which starts flowering for us around June 1, and hasn’t stopped yet.
Crinum ‘Superliscious’ is another of our new hybrids that starts flowering July 1, and has yet to stop. Now that our evaluation process is complete, we’ll start the propagation process.
Crinum ‘Southern Star’ is an incredible hybrid from the late Roger Berry, entrusted to us to propagate and make available. That’s a tall order since it’s one of the slowest offsetting crinum lilies we’ve ever grown. Crinum ‘Southern Star’ is a hybrid with the virtually ungrowable, yellow-flowered Crinum luteolum, which hails from Southern Australia. For us, Crinum ‘Southern Star’ doesn’t start it’s floral display until August 1.
One of our favorite evergreen shrubs is the queen of the variegated boxwoods, Buxus sempervirens ‘Elegantissima’. This plants thrives in part sun to light shade, where it looks great every month of the year. This excellent clone, which has been grown in Europe since the mid-1800s, matures at 5-6′ in height. Not only is it great in the garden, but if you have enough, you can cut some to use as a foliage filler in flower arrangements.
I’m more and more impressed with Hosta ‘Miss America’ each year. Not only is this white-centered hosta amazingly vigorous, but it has one of the finest floral shows we’ve ever seen on a hosta. The steel rod-like upright flower stalks on our plant have reached 4′ tall, but as the plant grows larger, they will eventually top 6′ in height. Not wind, rain, or post office vehicle can knock down these super sturdy stalks, and the great show they provide for weeks. Our plant is 100′ from our back porch, and it shows up like a floral beacon even from that distance.
If you’ve lived in the deep south…the land of palmetto palm trees, you know that they typically don’t flower until they have at least 5 feet of trunk. Of course, flowering can be sped up by a combination of precocious genes and good growing conditions. Those who have studied Sabal palmetto in the wild have noted that the earliest populations to flower are those from the most northern, naturally-occurring population on North Carolina’s Bald Head Island.
Well, sure enough, our oldest specimen of Sabal palmetto ‘Bald Head’, planted in 1999 finally decided to produce flower this summer, and will hopefully seed. We’ve only had enough plants of this cold hardy form to offer through Plant Delights three times in 36 years. Fingers crossed, we’ll be able to make it available more regularly now. Hardiness Zone 7b and warmer.
We love the spineless Agave bracteosa ‘Stingray’ in the garden. We’ve had these dotted throughout the garden since 2017, and so far, with good drainage, they’ve handled our winters quite well, which is certainly not normal for a variegated century plant. This particular species prefers part sun to light shade. Hardiness is Zone 7b/8a and warmer.
Tired of trying to grow the conventional baby’s breath, that’s a prize perennial in the colder zones? We were, and had been looking for a substitute for years, when in 2000, one of our former staffers introduced us to the widespread native, Euphorbia corollata. Although it doesn’t look like much in deep shade where it’s often found in the wild, it explodes when given a bit of sun. Here are a couple of photos as it’s flowering season starts in mid-July.
Euphorbia corollata looks seriously gangly in a pot, so we’re confident you’ll never see this on the shelves of the box stores. Average moisture to very dry suites it fine. Although not a clumper, it’s spread it’s far from a thug, and is easy to remove it it happens to move too far. For a plant that’s native to every state East of the Mississippi (except Florida), and almost every single county, it’s shocking that every gardener isn’t growing this gem. Hardiness is Zone 3a-9b.
The genus amorpha is a woody cousin to the better know genus baptisia in the Fabaceae (pea) family. Amorpha was named a genus by Linnaeus (perhaps you’ve heard of him) because the flowers only have a single petal, compared to 5, which is the norm in the rest of the family. Virtually all amorphas have many uses, from dyes to treating an array of medical conditions. There is an amorpha native in every one of the Continental United States…how many do you grow?
Our longstanding favorite member of the genus is the Midwest native Amorpha canescens, which makes a stunning, compact deciduous shrub, adorned in late spring with amazing, pollinator friendly flower spikes.
While we had our back turned, one of our Amorpha canescens got jiggy with a nearby Amorpha fruticosa, and the baby below, discovered by our staff, has now been adopted by us, and named Amorpha x frutescens. We actually might have some of these show up in the spring Plant Delights catalog.
Another amazing Southeast US (NC to FL) native species we like is Amorpha herbacea. Although it is rarely available, we think this has exceptional garden value and will most like show up in the Plant Delights catalog in the coming years.
I can’t imagine a summer garden without the South African woodland bulb, Scadoxus multiflorus ssp. katherine. This amazing bulb in the Amaryllis family, grows best in light, open shade, where it bursts forth sans foliage in late June. This clump is right outside our kitchen window, making it hard not to smile. Hardiness is Zone7b and warmer.
This is the time of year when the tiger swallowtails feast on our many patches of the amazing native Stokes aster. Our favorite clone is the upright growing Stokesia laevis ‘Peachie’s Pick’. Moist soils are best, but stokesia tolerates some dry conditions on a short term basis as long as it has 2-6 hours of sun.
I wonder how many folks know, have grown, or have even seen Hypoxis hirsuta…one of our US native yellow star grasses. This little native is so odd, it’s genus was kicked out of every established plant family to which it was formerly assigned…most recently Iridaceae, prior to that, Amaryllidaceae, Leucojaceae, and and now shoved off to the side into its own family, Hypoxidaceae.
The seven species native to North American are only a fraction of the 100+ species worldwide, although Europe was completely left out when this ancient genus was distributed. Below is Hypoxis hirsuta at JLBG.
South Africa also has an abundance of Hypoxis…below is Hypoxis multiceps, in flower now at JLBG. Most of the South African species we have grown are far more showy in the garden that the US natives. Part sun seems to be ideal for all the hypoxis we’ve grown, despite where they originated.
It only took us five attempts to figure out how to successfully grow the North American native, Stanleya pinnata. For those who haven’t met Stanleya pinnata, it’s a native woody perennial from the Westernmost States (North Dakota west to Southern California), so it really doesn’t find the rainy southeastern US to its liking. After several siting failures (learning experiences), we have finally found a location where it is thriving, a dry sloped berm in partial shade.
Stanleya was named after Lord Earl Smith-Stanley, The English 13th Earl of Derby (1775-1851) , who was quite a naturalist and president of the Linnean Society. This Lord Stanley wasn’t the only member of the Stanley family to have important items named in his honor. The NHL Ice Hockey trophy, the Stanly Cup, is named after his relative Lord Frederick Arthur Stanley (1841-1908), who was the son of Lord Edward Smith-Stanley, The 14th Earl of Derby, so it’s all in the family…Lord have mercy.
I’ve adored the perennial Lychnis coronaria (Rose Campion), since I first saw it in my grandmothers city courtyard 60 years ago, but the darn thing just produces far too many seed, which results in far too many seedlings. Imagine my joy at finding a sterile counterpart on my 2020 trip to the UK at the amazing nursery of plantsman Bob Brown.
Lychnis ‘Hill Grounds’ is actually a hybrid of Lychnis flos-jovis and Lychnis coronaria, discovered at the Hill Grounds garden of the UK’s Janet Cropley. In appearance, it’s a dead ringer for Lychnis coronaria with its lovely fuzzy silver rosettes and spikes of tacky fluroescent pink flowers, but without those pesky seed. We look forward to getting this propagated so we can share far and wide. Below are our 2 year old plants. Winter hardiness should be Zone 3-8.
Eighteen years ago, we introduced an amazing collection of the native Dicentra eximia from the West Virginia shale barrens that we christened for the nearby natural area, ‘Dolly Sods’. We found this amazing plant growing in pure gravel, in a bright sunny canyon that regularly saw summer temperatures in excess of 100 degree F.
We had struggled previously with other forms of Dicentra eximia, which is native all the way to the Canadian border. Not only did this seed strain thrive, but it did so in full baking sun. Here is a recent image of a clump growing beside an agave, where it thrives.
Chances are pretty good that few US gardeners have grown molopospermum. We’ve long been fascinated with members of the Apiaceae family (think carrots, celery, Queen Anne’s lace, etc.). Not only are most members culinary/medicinal, but they are also great host and food plants for insects.
Several of the Apiaceae family members are great for garden design, because they possess an airy fern-like texture. One such plant that I’ve long been fascinated by is the monotypic Molopospermum peloponesiacum. Despite the specific epithet indicating that it’s native to the Peloponnesian peninsula (Greece), such is not the case. An error was made when Linnaeus named the plants, that has never been correct. Molopospermum is actually native to the Alps and Pyrenees, spanning from Spain through France and into Italy, where in grows in open woodlands.
We weren’t sure if it would survive our hot, humid summers, but after finally tracking down seed, we have several thriving plants in the garden from a 2018 planting. Although we haven’t had any flower yet, we await the 5′ tall spikes.
One of the little-known native asclepias, milkweed, is flowering in the garden this week. Asclepias variegata, redwing milkweed, is a widespread native, ranging from Canada and Virginia south to Florida, and west to Texas. So, why is this virtually unavailable commercially? Our plants typically range from 1.5′ to 2′ tall, although 3′ is possible. For us, it performs best in part sun to light shade.
The specific epithet “variegata” which refers to two colors on the flower was certainly a poor choice, since most asclepias have multi-color flowers. Of course, Linnaeus didn’t have the benefit of the internet back in 1753.
The lovely native witch hazel, Hamamelis virginiana ‘Little Prospect‘ with its variegated foliage, looks amazing even when it isn’t in flower. The leaves show no foliar burn in full sun and it is just as beautiful in part shade. Hardiness Zone: 3a to 8b.
We’ll certainly remember 2022 for many reasons, but a highlight is the first flowering of our Davidia involucrata ‘Sonoma’. This incredible tree was named for French missionary and naturalist, Armand “Pere” David (1826-1900), who first discovered the tree in its native China.
Like dogwoods, what we think of as flowers are actually bracts, the effect is that of the tree in flower is like a dogwood on steroids. Interesting, davidia is in the black gum family, Nyssaceae, and although this tree is not common, it has acquired the common name of dove tree.
We’ve learned a bit about what davidia likes, having killed five plants since first trying it in 2002. Full sun is not ideal, as is deep shade. Our original plant, which as been in the ground since 2002 has yet to flower. The plant of Davidia ‘Sonoma’, which flowered this year, was planted in 2014, and is thriving in light shade/part sun.
Solomon’s Seals comprise several genera of woody perennials, but the common name is most commonly associated with the genus, Polygonatum in the Asparagus family. It seems hard to imagine, but the Asparagus family now includes many popular garden plants including its namesake Asaparagus, but also hosta, agave, liriope, ruscus, and yucca.
The genus Polygonatum is native through much of the world, although the center of distribution is in Asia. We’ve been collecting these amazing woodland perennials for years, and now have a collection of over 380 different taxa. Here are a few from this week in the garden.
Polygonatum mengtzense is a dwarf, rarely cultivated species from North Vietnam.
The dwarf, glossy-leaf Chinese Polygonatum nodosum just oozes elegance.
When you run out of species to grow, you start creating hybrids. This is our new selection of a cross of the giant Polygonatum martinii and the more compact, Polygonatum falcatum. We’ve named this clone Polygonatum x marcatum ‘Winsome Wonder’
Polygonatum odoratum ‘Chanticleer’ is a superb, large-leaf form of the Asian Polygonatum odoratum that I spied at Chanticleer Gardens, and they kindly shared in 2006. Hopefully, we’ll finally have enough to share next year.
Polygonatum odoratum ‘Angel Wings’ (aka: ‘Carlisle) is a superb form of Polygonatum odoratum from Massachusetts plantsman, Roy Herold. This gem grows in both half day sun as well as shade.
I fell in love with puccoons several decades ago, when I first saw them growing on the Michigan dunes as I hiked around the shoreline. I was immediately smitten with this native member of the Borage (pulmonaria) family. There are 21 different species of Lithospermum (puccoon) in the US, where some go by the common name, stoneseeds.
It would take me five transplant attempts over the next three decades before we were able to successfully get one established in the garden. The photo below is our collection of Lithospermum caroliniense (hairy puccoon) from East Texas, flowering now in it’s new home adjacent to our crevice garden. This species is partial to acidic, sandy soils, so our next task is to figure out what other conditions it will tolerate and then to get it propagated, so we can share.
Will someone please explain to me why more people aren’t growing the amazing sea kale, Crambe maritima. This amazing perennial is a great tasting green that returns every year without replanting. It’s also a great flowering perennial, putting on a show now in our rock garden. We have also never seen any pest activity such as typically bothers other members of the cabbage family. Our plant is growing in half-day sun in pure gravel (in our crevice garden), and never receives any supplement irrigation. The economic return from Crambe maritima is huge. I guess some folks may not find it attractive, but darn, folks!
Mukdenia is an odd monotypic genus in the widespread Saxifrage family, along with cousins heuchera, tiarella, and the namesake saxifraga. The odd genus name honors the former city of Mukden in Manchuria, which is now known as Shenyang. Mukden was the site of the largest modern day battle, prior to WWI. In case you missed it, the final score was Japan 1, Russia 0.
Several on-line sites, including that purveyor of accuracy, Wikipedia, proclaims there to be two species of Mukdenia, which is sadly incorrect. Although I’m sure Mukdenia rossii would like a sibling, one simply does not exist. I think of Mukdenia like Smucker’s…with a name like that, it has to be good…and it is.
Mukdenia naturally resides in China and Korea, where it can be found in some rather inhospitable places. I had to laugh when I read countless on-line articles that repeat the myth that mukdenia needs water during summer drought. It certainly doesn’t mind summer water, and will probably look better as a garden specimen with some irrigation. My first encounter with mukdenia in the wild was in fall 1997 on South Korea’s Mt. Sorak, where it thrived, growing in the rock cracks of a nearly vertical cliff (below)
When we built our concrete crevice garden, mukdenia was one of the first plants I wanted to plant to see if it would mimic what I had seen in the wild. Below is our 2017 planting of Mukdenia rossii ‘Karasuba’ in late March/early April 2022, as it emerges in flower. The foliage continues to expand around the flowers. Our plants get 3-4 hours of sun each morning, then shade the remainder of the day. Winter hardiness is Zone 4a-7b.
Here are a few buttery-colored plants flowering today in garden, starting with Arum creticum ‘Golden Torch’. This started as a small field division of a particularly large flowered selection from our 2010 expedition to Crete.
Paeonia mlokosewitschii is known for being un-pronouncable, so most folks refer to it as Molly the Witch peony. This is a particularly lovely butter yellow form from Ellen Hornig of the former Seneca Hill Perennials.
Trillium sp. nov. freemanii is a still unpublished new trillium species (hopefully soon), that we discovered in 1998. Normally red flowered, this is a rare yellow-flowered form.
Here are images of three of the “next generation” ajuga cultivars, all selections of the Italian Ajuga tenorii. These in-ground photos were all taken at JLBG on April 1. These new ajugas don’t spread wildly or seed around like many of the older, more commonly grown offerings. We think they are pretty darn amazing! The top photo of Ajuga ‘Blueberry Muffin’ represents several plants, planted on 1′ centers. The second image is a single plant of Ajuga ‘Cordial Canary’, and the third is a single plant of Ajuga ‘Petite Parakeet’. These are actually non-staged images, unlike the highly staged, completely unrealistic, manufactured photos you often see in the Dutch-centric catalogs. Hardy from zone 4a to 9b.
Flowering for the last few weeks is the late winter-flowering groundcover, Arabis procurrens. This Balkan native is a rather amazing evergreen groundcover in the cabbage (Brassicaceae) family. For those who never took Latin in school, procurrens = spreading. We grow this in a fairly dry spot in the garden where it gets 2-3 hours of sun each morning. Winter hardiness is Zone 3-8.
Antennaria solitaria, the solitary pussytoes is looking great in the garden this week. This amazing native groundcover hails from Ohio south to Alabama, where it can be found in open shade or part sun, but always in dry soils. Despite being native in acidic soils, our plants below are thriving in our alkaline crevice garden.
Starting in late winter, the amazing blue-flowered South American Ipheion ‘Rolf Fiedler’ begins its stunning floral show in the garden. This rare native, which has only been found on the top of two hills in Uruguay, has yet to be formally assigned a confirmed species name, although some botanist believe it to be Ipheion peregrinans. Growing much lower to the ground than it’s South American cousin, Ipheion uniflorum, this un-named species spreads nicely in dry soils, either in full or part sun.
If you’re taxonomically inclined, the entire Genus ipheion has been bounced back and forth between a series of other genera for the last century, so we’re waiting for the taxonomic dust to settle before changing tags. Ipheion has previously been included in a number of other genera including Beauverdia, Brodiaea, Hookera, Leucocoryne, Milla, Nothoscordum, Tristagma, and Triteleia. Not only is the genus in question, but ipheion has now been moved from the onion family (Alliaceae), where it resided for a century to the amaryllis family (Amaryllidaceae).
For now, we’re just enjoying “rolfing” in the garden.
We’ve made a regular habit of killing fritillarias (the bulb…not the fried food) in the garden, especially those ungrowable brightly-colored species like Fritillaria imperialis that tantalizingly appear each fall in the major bulb catalogs.
Although it lacks the bling of it’s showier cousins, the species that is reliable for us in the garden is Fritillaria thunbergii. This native of Kazakhstan has naturalized in both western China and Japan, where it has been used medicinally for almost 1,000 years as a treatment for respiratory ills. There is still some debate among botanists whether some of the Chinese population might actually be native as well.
In the garden, Frittilaria thunbergii emerges in February, and is full flower at 2-3′ in height by early March. As with most spring ephemerals, it has gone to sleep by early May. Light shade or part sun seems to suit it fine. Hardiness is at least Zone 7a-8b.
The superb (and spineless) Ilex ‘Cherry Bomb’ is looking amazing in the garden this week. Our specimen is now 22 years old, and measures 35′ tall x 15′ wide. It originated at the US National Arboretum as part of Dr. William Kosar’s breeding program, and is a 1959/1960 seedling from Ilex ‘Nellie R. Stevens’, most likely a hybrid with the spineless Ilex integra.
It was sent around to different growers for evaluation trials under a code #, and was later determined to not have enough value for northern US growers, so a destruction notice was sent by the National Arboretum.
Like some characters in the slasher flicks, it wasn’t completely destroyed, as propagations from the holly managed, quite improperly, to make its way to the deep south, where growers found it quite extraordinary, and in the 1980s, it was given the name Ilex ‘Cherry Bomb’ by Dr. Dave Creech of Steven F. Austin University. This wonderful plant is now a staple in the Southern nursery industry.
With our recent 16 degree F winter temperatures, all of the cycas plants (sago palms) in the garden now have fried foliage. This foliage will not recover, but damage like this is fully expected in our climate, and not something that will damage the plants. Be sure to not remove the old damaged foliage this early, however, since cycads are programmed to shoot out new foliage 10-14 days after the old foliage is removed, and this is much too early for new foliage, with more cold weather likely on the way.
We like to remove the old foliage starting in mid-April, when it should be safe. As you can see in the second photo, the central crown is still in great shape, undamaged by the cold temperatures. We think the central crown is one of the most fascinating parts of a cycad, which shows its’ ancient lineage.
If you’ve visited JLBG, you know how much we love working with rocks, so we continue to find new areas to plant more. We’ve recently tackled two long overdue projects near the Mt. Michelle waterfall.
The first was re-working the Mt. Michelle watercourse we know as Mystic Creek (named after one of our late cats). When this was installed in 2003, we used concrete to form the water channel. Well, after 18 years, tree roots had their way with the concrete, which lost both the battle and the war.
After a fair amount of root excavation work, Jeremy and Nick installed a new rubber liner, with rocks along the edge. We’ll probably wait until spring to finish the replanting in order to avoid planting on top of something that was winter dormant. Below is the new rocked watercourse.
Phase 2 of the project was re-working an adjacent bed, where light levels had changed dramatically since it was installed in 1998. Originally a full sun bed, the shrubs on the west side have grown substantially, leaving us with a bed that only gets 3-4 hours of sun on one end, and a full shade area underneath the canopy.
Here, we raised the center of the bed, with more of Jeremy and Nick’s rock work, which was then filled with our on-site created compost. This created a visual barrier to much of the winding path that visitors use to get closer to the small plants, which are now tucked in the crevices.
One the back (west) side, Jeremy and Nick installed another small rock seating area, of which there are never enough.
There are a few more days of rock work to complete Phase 2, then we’ll start on Phase 3, which will rework the west face of Mt. Michelle, with more boulders to create additional planting pockets. We hope you’ll check out the progress at our upcoming winter open house.
Fargesia robusta is one of the many excellent clumping bamboos for the garden. Thriving in light shade to part sun, this evergreen gem tops out around 7′ in height. We know it’s still hard for some people to realize, but clumping bamboos truly cannot run. This garden specimen at JLBG is now 22 years old. We love both the texture and architecture of bamboos. Winter hardiness is Zone 7a-8b.
In full flower now at JLBG is Mahonia x lindsayae ‘Cantab’, a hybrid of Mahonia japonica and the virtually unknown Mahonia siamensis. The intensely sweet fragrance is truly intoxicating…the strongest in the genus Mahonia. Sadly, you’ll rarely find this available for sale, since it’s somewhat gangly form doesn’t curry favor with most nursery growers. Winter hardiness is Zone 7b and warmer.
It’s always interesting when we introduce a plant we think is an incredible addition to the garden, but virtually no one purchases it. Thank goodness, it doesn’t happen too often, but I’m reminded of one such case every day when I get home and admire our row of Agave x striateosa ‘Straight and Narrow’. This 2015 introduction was the first ever hybrid introduction of Agave bracteosa and Agave striata…both non-spiny century plants.
We couldn’t stand to throw out all the plants that didn’t sell, so we planted a row under a wide overhang along our home, where they never see any water, and are in shade for more than half the day. Here is one of those plants five years later, providing a texture and form that you simply can’t find with any other plants that tolerates those conditions.
We have a second seedling from the same cross, which we’ve never been able to share, but which flowered in 2015. Despite our best attempts, we were not able to get any seed set. Now, we await the first flowering of this clone in the hopes it is more fertile, so we can create some more unusual hybrids. Unlike most century plants, Agave striata is not monocarpic (doesn’t die after flowering), so we expect this hybrid to also live on in perpetuity after flowering. Winter hardiness is Zone 7b-10, at least.
There aren’t a large number of trees that flower in winter in temperate climates, but one we can’t imagine gardening without is Arbutus unedo ‘Compacta’. This amazing Mediterranean native has thrived for us since the late 1980s.
Arbutus is a member of the Ericaceae family, which is why the flower so closely resemble those of its cousin, Pieris.
The clusters of red fruit that ripen in late winter after months of flowering resembles miniature strawberries, hence the common name of strawberry tree. The shaggy cinnamon bark is also another striking ornamental feature. Our 30 year old specimen has reached 12′ tall x 12′ wide. Hardiness is Zone 7b and warmer.
One of our favorite winter hardy (Zone 7b) century plants is the non-spiny Agave bracteosa ‘Stingray’. Here is one of our garden specimens this week, which has been thriving in the ground since 2016. Unlike most agaves, which prefer full sun, Agave bracteosa is better in part sun (full sun for only a few hours during the day). Agave bracteosa ‘Stingray’ is also a fairly slow grower that only produces a few offsets. A mature rosette will top out around 15-18″ tall x 2′ wide. We love the unique texture, which differs from all other agaves.
Here’s one of our favorite hollies, looking great in the garden this week. Ilex integra ‘Green Shadow’ is a variegated (creamy-edged leaves) form of the Mochi holly. This amazing columnar holly, that hails from oceanside mountain slopes in Japan, Korea, Southern China, and Taiwan, reaches 20′ tall x 7′ wide, which is the case with our 16 year old specimen. Although Ilex integra ‘Green Shadow’ will grow in both sun and shade, full to half day sun results in the most dense foliage. This is female clone, but we never see more than a dozen berries, so we assume it needs a male nearby to fruit better. For a narrow evergreen screening plant, it’s hard to beat. Hardiness is Zone 6b-9b.
The dwarf groundcover Sedum tetractinum ‘Little China’ is superb throughout the growing season, but we particularly love when cold weather arrives and the olive green foliage turns to bright red in the sun…what a superb winter show. Hardiness is Zone 4a-8b.
One of the last plant exploration trips the late plantsman Alan Galloway made, was to Majorca, Spain. Alan was so excited to return home with some special selections of the fall-flowering Arum pictum, which typically has solid green foliage…except on Majorca. This beautiful form is known by collectors as Arum pictum var. sagittitifolium, although the name isn’t considered valid due to the natural variability in leaf patterns. This is Alan’s favorite form from his trip, to which we added the cutlivar name, A. pictum ‘King James’. It seems that back when Majorca had kings (thirteenth and fourteenth century), before its merger with Spain, they had a propensity for naming most of them, James.
In full flower this fall is Disanthus cercidifolius. Ok, so full flower on a disanthus may not seem too exciting to the petunia and pansy crowd, but plant geeks find these flowers pretty darn cool. We’d nearly given up on growing this witch hazel relative after finding in our first few attempts that it has zero heat tolerance. It wasn’t until we obtained a plant from a Chinese population (Disanthus cercidifolius ssp. longipes) of the better known Japanese native, that we realized there is a form we can grow, and grow well. Not only does the Chinese form have heat tolerance, but it also thrives in full sun. The specific epithet “cercidifolius” means foliage like a cercis (redbud).
We love plant mysteries, and Sabal ‘Blackburniana’ fits the bill nicely. This pass-along seed strain has been considered by some to be an old hybrid of Sabal minor, while others consider it to be synonymous with Sabal palmetto, yet others consider it to be Sabal domingensis. Whatever it is, our plant is looking quite good in the garden. After growing it, unscathed, since 2008, we finally decided to propagate some for the upcoming Plant Delights catalog. If you know any more historical background about this curiosity, please share.
Many gardeners are familiar with or have grown arum…mostly forms of the widespread Arum italicum, but few have grown the blingy gem of the genus, Arum pictum var. sagittitifolium. We are thankful to have this amazing collection from an Alan Galloway expedition to Majorca, Spain. Sadly, this species isn’t nearly as winter hardy (Zone 7b and warmer) as Arum italicum and we have never been able to coax it to set seed.
We have been very impressed with this stunning new selection of Podocarpus from Japanese nurseryman, Yoshio Sato. Podocarpus ‘Miu’ is a wonderfully variegated selection that has shown a good dense habit, great coloration, and no burning in full sun.
Since so many Americans purchase plants based on the name, and Japanese cultivar names make plants a very difficult sell in the US, the US marketing folks sell this as Roman Candle podocarpus. No matter what you call it, it’s a heckuva plant. Hardiness is Zone 7b and warmer. The marketing folks say this will mature at 15′ tall x 4′ wide, but the in the patent, the originator says it matures at 50′ tall x 25′ wide. Hmmm…that’s quite a discrepancy. Sounds like someone is fibbing.
Calycanthus ‘Burgundy Spice’ is looking so great in the garden at JLBG this fall…right before it strips down for the winter. We love this exceptional purple-foliage selection of the native Sweet Betsy, discovered and introduced by our friends, the Hesseleins’ of Pleasant Run Nursery in NJ.
Looking lovely in the garden is week is Gossypium thurberi ‘Mt. Lemmon’…our introduction of one of the progenitors of modern day cotton. On a 2005 botanical expedition, we discovered this North American native perennial hibiscus relative, known as Desert Cotton, growing in the mountains of Arizona. In the garden, it’s a superb flowering machine for late summer and early fall. Winter hardiness is probably Zone 8a and warmer.
We were so thrilled when the Japanese began hybridizing fuchsias to tolerate hot, humid summers, that we did mental backflips. Over two decades later, these amazing plants still thrill us with both their tolerance of our harsh summers and winters. Here’s a photo of Fuchsia ‘Sanihanf’ in the garden today. Good siting (part sun and good drainage) is still important for success.