We have a number of favorite legumes in the garden, but most flower in the spring or early summer. The star of the fall garden is undoubtedly Dalea bicolor var. argyaea, which starts flowering in mid-October. All summer, we get to enjoy the silver foliage, which thrives in our summers, only to be further rewarded in fall with the floral show. This amazing North American native hails from Texas and New Mexico, where it can be found in alkaline sandy uplands.
Everyone grows the Asian butterfly bushes because of their huge flower panicles, but there are some really cool native buddleias that are mostly overlooked. Below is Buddleia marrubifolia from Presidio, Texas. Native to the Chihuahuan Desert, mature plants can reach 6′ tall x 6′ wide. The hairy white foliage serves as a nice foil for the odd, small orange, sattelite-looking flowers that adorn the plant starting in late summer. We last offered this in 2000 to raucous sales–just kidding about the raucous sales. Nurserymen disdainingly refer to these as BIO plants….botanical interest only. Hardiness Zone 7b-10b.
Here’s another of those plants that virtually no one has either grown or even knows about. Handelia trichophylla is a little-known monotypic member of the aster family (Asteraceae). Not only does it have hairy, silver foliage, which usually spells certain death in our summers, but it hails from the “stans”, which include the low rainfall countries of Afghanistan, Kazakhstan, Kirgizstan, Pakistan, Tadzhikistan, Turkmenistan, Uzbekistan, and Xinjiang. Our particular plant is from a seed collection in Tadzhikistan.
We would not typically expect anything native to the “stans” to survive in the hot, humid Southeastern US, but this is why we experiment, and why we create unique habitats and microclimates in our garden. In this case, Handelia has thrived for four years in our crevice garden, where it grows in a soil mix of 50% Permatill.
We were thrilled how well Agave x protamericana ‘Silver Surfer’ came through the 11 degree F. cold snap this winter. This 2007 Plant Delights/JLBG agave introduction was our selection from a Yucca Do Nursery seed collection in Northern Mexico of a naturally occurring hybrid between Agave americana and Agave asperrima.
We have been fascinated with hardy cyclamen since the 1960s, but in recent years have spent a bit of time isolating some of the best silver-leaf variants that showed up in our seed pots and getting these established in the garden. These silver leaf oddities can be found in the wild, although they are fairly rare. In cultivation, however, they come fairly true (50%) from seed.
Through Plant Delights, we offer these as seed strain cultivars, under the names below…when available. A new crop of cyclamen will go on-line January 1, and there are some real beauties. Here are some images from the garden this week. Winter hardiness is Zone 4a-8b.
We’ve grown quite a few stachys (pronounced stay-kiss) through the years, but have been most impressed this spring with our newest acquisition, Stachys cretica. This fascinating dryland perennial has a wide natural range from France to Iran, where it thrives in rocky, dry, Mediterranean-like conditions. Our plants are seed-grown from Greek Plantsman, Eleftherios Dariotis, who will be speaking at our upcoming Southeastern Plant Symposium.
Stachys is one of the largest genera of plants in the sage (Lamiaceae) family, with estimates ranging from 300 to over 400 species. Stachys species are spread worldwide, being found from Europe though Asia, Africa, and into North America.
Shockingly, Stachys cretica seems virtually unknown to most gardeners, despite it puttig on a killer floral show in an unirrigated bed, and being foraged in our garden, by a huge number of bumblebees.
One of our favorite ferns is the Lady fern hybrid, Athyrium ‘Ocean’s Fury’. Created in Pittsboro, NC by plantsman Thurman Maness, this patented gem was offered for years through wholesale channels, but sales were not strong enough, so the sole producer discontinued it. So often, great patented plants suddenly become unavailable if sales don’t warrant.
In Europe, any grower can petition the PVR office to request permission to propagate such protected plants, but no such program exists in the US. Fortunately, Thurman has generously granted us permission to propagate his amazing introduction and make it available. That said, division is a very slow way to make ferns available, but since this hybrid between Athyrium filix-femina and Athyrium nipponicum is sterile, it’s our only option.
Here’s a fun combination this from the garden this week, where we combined two three-leafed plants together…a silver leaf Trillium cuneatum with the hardy purple-leaf shamrock, Oxalis triangularis. You can have all kind of fun making these little vignette combinations in your garden, using your school colors, or any other design scheme that suits your tastes.
Most plants have Latin name epithets (the 2nd word) that describes/commemorates either a place, person, or plant characteristic. In this case, the foliage of this Greek wooly mullein (Verbascum undulatum) is ridiculously wavy. Here it is looking great in our rock garden during the early winter. This will be our first full winter with it in the ground, so fingers crossed that it survives.
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.
For the first time in years, our olive (Olea europea ‘Arbeqina’) here at JLBG is loaded with fruit. It’s been a while since we’ve had a crop, not because of cold, but because a f..xy!!!zz? beaver cut our tree completely to the ground several years ago. We offered this through Plant Delights for many years, so we hope others have been equally successful at producing an olive crop.
Our favorite fall-flowering legume is looking fabulous now. While most daleas (baptisia cousins) flower in spring and summer, only one that we’ve grown waits until fall to produce its amazing floral show. Dalea bicolor var. argyraea is an easy-to-grow species, found in the dry alkaline sandy soils of Texas and New Mexico. Here at JLBG, it has thrived everywhere it’s been planted…all dry, un-irrigated beds. Native pollinators love it also.
We don’t know how many of you have noticed this in the JLBG garden during open house, but this special gem is from a Chinese spore collection by JC Raulston Arboretum director, Mark Weathington. Now that it’s large enough, we have sown spores so we can work with JCRA to introduce this gem to the public.
We’ve long prized artemisias in the garden, many for their wonderful silver foliage and amazing texture. We’ve always had a love/hate relationship with the North American native Artemisia ludoviciana. This widespread native (or naturalized species) occurs in every US state between Canada and Mexico, and is divided into eight subspecies. Below is our specimen of a superb collection by Patrick McMillan from Gillespie County, Texas that we call Artemisia ‘Fredericksburg’. We find this a much better plant than the commonly sold Artemisia ‘Valerie Finnis’ and ‘Silver King’, both of which have coarser foliage and spread too fast for our taste. All forms of Artemisia ludoviciana spread to some extent, so be sure to locate it in a sunny location where it can romp.