Slightly Deranged Hydrangeas

We love the genus hydrangea, but are really fascinated by those at the far end of the family tree. While most hydrangeas flower in late spring, we actually have a couple flowering now we’d like to share.

The first is Hydrangea involucrata, a native to both Japan and Taiwan. The word “involucrata” indicates it has some serious involucres (the bracts surrounding the inflorescence). The first image shows the plant in bud, the second in full flower, and the third image is after the flower color has faded. All three stages are on display at once in the garden this week. They typically reach 6′ in height and width. Winter hardiness is Zone 6a-8b.

Hydrangea involucrata in bud
Hydrangea involucrata

Hydrangea involucrata

Hydrangea amamiohshimensis (below), from Japan’s southern Ryuku Islands, was once considered a hydrangea cousin, until a 23andMe test confirmed it was actually a true hydrangea. Prior to the test, it belonged to the genus cardiandra, which was effectively a perennial hydrangea, dying back to the ground each fall like most perennials. It too is in full flower in the woodland garden this week. Perhaps now that it has a recognizable name, more folks will be willing to grow it. This is the only one of the four former cardiandra species that has survived in our climate.

Hydrangea amamiohshimensis

Stoned Oak

Our 12 year-old stone oak, Lithocarpus glaber is looking fabulous this month, as it has come into full flower in early September. We love the stone oaks, which contrast to regular oaks in the genus, Quercus, by having upright insect-pollinated flowers, compared to wind-pollinated, drooping flowers in the genus Quercus, and by having exclusively evergreen foliage. Lithocarpus glaber is native to China, Japan, and Taiwan.

Simply Sublime

Looking particularly lovely in the late summer garden is Fatsia japonica ‘Murakumo Nishiki’. This irregularly gold variegated form of the typically solid green tree ivy is a star in the light shade garden. This evergreen gem is a great way to add a spot of color in the woodland garden year round. Hardiness is Zone 7b-10b.

Frosty Pearl

One of our favorite broadleaf shrubs is undoubtedly Orixa japonica ‘Pearl Frost’. Orixa is a monotypic (one species) genus in the citrus (Rutaceae) family, that’s virtually unknown in US gardens.

We are particularly enamored with this superb variegated form, brought into the US by plantsman Barry Yinger. Orixa ‘Pearl Frost’ matures at 8′ tall x 6′ wide, and we have found it to thrive in both full sun to light shade, although full sun plants require more moisture.

Orixa japonica ‘Pearl Frost’

Eye See You

Ever since I saw my first dragon’s-eye pine over 40 years ago, I was smitten, and throughout the years have been fortunate to collect several different named cultivars with this unique trait where the new needles emerge bicolor white and green. Here is our young specimen of Pinus densiflorus ‘Burke’s Red Variegated’ looking lovely in the gardens this week. This selection of the Japanese red pine, originated as a seedling from Long Island’s Joe Burke, from the cultivar Pinus densiflorus ‘Occulis Draconis’. Hardiness is Zone 5-8.

Pinus densiflorus ‘Burke’s Red Variegated’

Stunning Townhouse

Lagerostroemia faurei ‘Townhouse’ is looking great at JLBG this summer. This compact selection was named by the late J.C. Raulston, in addition to the taller, narrower cultivar L. ‘Fantasy’. Townhouse crape myrtle is also highly prized for its dark cinnamon bark…the darkest of any crape myrtle we know. Our oldest specimen is now 35′ tall x 35′ wide.

This selection is from an original 1957 seed collection made by the late Dr. John Creech of the US National Arboretum, on Yakushima Island off the southern coast of Japan. Hardiness is Zone 6b-9b.

Calanthe Love

Here is a clump of Calanthe ‘Takane’ in our garden in early April. This amazing and easy-to-grow terrestrial ground orchid forms a dazzling clump with age. This mass started as a single division in a 4″ pot, 17 years ago. Not only do they thrive in the ground, but in Japan, they are prized as container plants.

Calanthe ‘Takane’ is a group of hybrids between Calanthe sieboldii and Calanthes discolor, so each seedling is slightly different in flower color. The foliage remains evergreen during most winters for us, but when temperatures drop near 0 degrees F, the foliage will die back completely. Calanthes thrive best in light shade. Winter hardiness is Zone 7a-9a.

Japanese Princess Sedge

Carex conica ‘Hime’ has been in horticultural commerce for many decades, and remains a superb woodland garden sedge. The evergreen species Carex conica is native throughout Japan, where it occurs in woodland conditions. This variegated selection that goes by an array of names such as ‘Snowline’ and ‘Marginata’, but Carex conica ‘Hime’, which translates to “princess” seems to the the correct cultivar name. The tight 10″ tall x 20″ wide clumps of narrow white-edged leaves are topped with this fascinating floral show for us in early March. In 35 years of growing this, we have yet to see a single garden seedling.

The Elusive Red Witch Hazel

Flowering this week at JLBG is the amazing cherry red Hamamelis japonica ‘Tsukubana-kurenai’, also known as Shibamichi’s Red witch hazel. This gem was selected by legendary Japanese nurseryman, Akira Shibamichi, who also introduced Metasequoia ‘Ogon’. We were blessed to have Mr. Shibamichi visit JLBG back in the 1990s.

A Little Diamond

Cryptomeria japonica ‘Little Diamond’ is one of our favorite dwarf Japanese cedar selections, this one from Holland Konjin Nursery prior to 1990. This specimen at JLBG is five years old and measures 2′ tall x 3′ wide. At maturity, we have seen these reach 4′ tall x 8′ wide.

The Spectrum of Siblings

Throughout the years, we’ve grown literally thousands…perhaps 10s of thousands of seedlings of the Japanese sacred lily, Rohdea japonica. Each one varies slightly, but we only save those at the far end of the bell curve. Here are three of our seedlings which well represent that dramatic variation at each end of the spectrum…a wide leaf form we named Rohdea ‘Stork Nest’ (15 yrs old), a very narrow leaf form we named Rohdea ‘Thin Man’ (16 years old), and a miniature that has yet to be named.

Rohdea japonica ‘Stork Nest’
Rohdea japonica ‘Thin Man’
Rohdea japonica JLBG-091

Lithophytes, epiphytes, tigers, and bears…oh my

Just out in the garden in early January and wanted to share photos of a few of our favorite evergreen ferns that would rather not be growing in the ground. In our garden, these are all growing within a few feet of each other.

Each of these ferns are epiphytes, which grow attached to a tree, or lithophytes, which grow attached to a rock. None of these ferns actually need soil to grow, since they get their food and water from the atmosphere and accumulated organic debris. Epiphytes, however, don’t get nutrients from their host plant…only physical support.

All epiphytic ferns thrive in hanging baskets, especially the spaghnum-lined type, since this most closely mimics their natural preferences. In our case, we are a bit colder than their native haunts, so for us, we force these ferns to reside in the ground since that gives them a bit more protection during severe winter temperatures. The key for epiphytes to survive in the ground is to have very loose, organic soils and always plant them on a steep slope.

Neolepisorus fortunei ‘Green Ribbons’ is our 2017 introduction of a Chinese native epiphytic fern.

Neolepisorus fortunei ‘Green Ribbons’

Pyrrosia lingua ‘Hiryu’ is also an epiphytic fern, native to Japan.

Pyrrosia lingua ‘Hiryu’

Lastly is Polypodium vulgare ‘Ulleung Island’. Instead of being an epiphyte, this evergreen fern is a lithophyte. Lithophytes are classified as either epilithic (growing across the rock surface) or endolithic (growing in cracks or crevices). Since we found this in the wild, growing across the surface of a giant rock, this fern is an epilithic lithophyte…say that three times fast. This is our 1997 collection from an island, far off the coast of South Korea.

We hope you’ll explore these unique ferns in your garden.

Polypodium vulgare ‘Ulleung Island’

Flowering Tractor Seat

We recently had someone inquire if we grew tractor seat plant, a common name I had not heard prior. After a brief pause, I figured few plants, other than our 2000 introduction, could possibly fit that name. Sure enough, a quick web search confirmed that Farfugium japoncium var. giganetum ‘Marco’ is indeed their target. While wandering through the garden this weekend, I found one clump still in flower, that somehow avoided damage from several nights at 27 degrees F.

To our knowledge, this giant form of Farfgium japonicum, native Japan’s southernmost Ryukyu Islands, was first brought to the US by plantsman Marco Stufano, who rationed out one plant per year for a NY Rare Plant Auction. When Marco was ready to retire from Wave Hill, he finally shared a piece with us, so we could get it mass propagated, hence we named the clone in his honor. To our knowledge, all tractor seat plants sold in the US came from Marco’s original plant.

Slim and Trim

Anyone who has visited JLBG, knows we are huge fans of the Japanese sacred lily, Rohdea japonica. While the variegated forms are certainly showy, we also love the solid green varieties, especially the narrower leaf forms, so here are a few of our favorites. The top is Rohdea japonica ‘Fukuju Kan’, followed by Rohdea ‘Feelin’ Groovy’, and finally Rohdea ‘Line Dance’. All photos were taken in our gardens this week. For us, these amazing evergreen plants remain looking great all winter and the orange-red winter fruit are a bonus. In the garden, they function like evergreen hostas. The first two are what is known as dragon-ridge (crested) varieties. Hardiness is Zone 6b-9b.

Rohdea japonica ‘Fukuju Kan’
Rohdea japonica ‘Feelin’ Groovy’
Rohdea japonica ‘Line Dance’

Selective Love

I’ve never been a huge fan of nandinas in the garden. I find the more typical forms very difficult to integrate from a design perspective, and I find the popular Nandina ‘Firepower’ to be near the top of the list of most grotesquely ugly plants used in American landscapes. Yes, it’s colorful, but the plant lacks any grace, and has the form of a pile of wet red Kleenex.

Of the older cultivars, I like Nandina ‘Harbor Dwarf’, with it’s low spreading form, but the paucity of fruit keeps most people from planting it. The only downside for us is that it spreads to cover a very large footprint, so can choke out other nearby plants. We continue to trial all of the new nandina introductions to see if anything strikes our fancy.

My favorite member of the genus, which I first met at the JC Raulston Arboretum back in the 1980s, is Nandina domestica ‘Filamentosa’. This cutleaf, slow-growing, non-fruiting selection from Japan is often marketed under the trade name San Gabriel. It adds a distinctly Japanese flavor to the landscape, which is why we planted a mass in our new Japanese garden. Here is a photo from this week with it’s lovely rosy winter color. Winter hardiness is Zone 6b-9a.

Orangeola

Sounding more like a soft drink/crayon combination, Orangeola is actually a stunning selection of weeping, dissected, purple-leaf Japanese maple. Our oldest specimen at JLBG is now 27 years old, and measures 5′ tall x 12′ wide…sorry that size doesn’t really match what you’ll find on-line. We think it’s one of the most handsome clones we grow.

New Plants for January!!

Throughout the year Plant Delights is continually adding new plants to our website. We have just added over 40 new plants this past weekend. You can check out all the new additions by clicking here.

Some of the exciting new additions are Disporopsis ‘Zebra Stripes’, an evergreen variegated Solomon’s Seal which forms a nice 22″ tall clump by spreading underground rhizomes.

picture of Disporopsis Zebra Stripes

Disporopsis ‘Zebra Stripes’

picture of Aucuba Fujikawa

Aucuba japonica ‘Fujikawa’

Aucuba japonica ‘Fujikawa’ is compact female form and will form a 4′ specimen in 5-7 years. The narrow leaf gives a fine texture. If there is a male cultivar nearby, ‘Fujikawa’ will produce bright red berries in the winter which really stand out against the dark green foliage.