I doubt any of our garden visitors actually slow down enough to notice some of the smaller treasures flowering now, like the dwarf Chinese gesneriad, Petrocosmea oblata. When I say small, I’m talking 2″ in full flower. We are fascinated by the array of Asian gesneriads that thrive in rock cracks, most of which are fairly unknown outside of their native habitat, unless they are grow in containers by members of the American Gesneriad Society. It’s our hope to bring more of these treasures to light.
We love the late winter flowering Drabas, which thrive in our dry crevice garden. Below is the miniature Draba hispanica, which has been in flower since late February. This Spanish species likes to grow in dry limestone cracks, such as the one we provided here. Unless you’re an avid rock gardener, you may not realize that draba is actually in the cabbage family, Brassicaceae. Once the flowers finish, you’re left with a fuzzy evergreen bun of foliage for the rest of the season. Zone 5a-8a, at least.
Since ferns are one of the groups on which we focus our ex-situ conservation efforts, we have collected a huge number of species and selections from around the world. One that has continually frustrated us is the miniature rock fern, Asplenium trichomanes. Although this small gem is native to every continent except Antartica, we have struggled to keep it alive.
In our travels, we have collected it from Europe to Africa, but have also managed to kill all of those collections in the garden. Since our first attempt in 2004, we have now killed Asplenium trichomanes 16 times. We believe, however, in the late JC Raulston’s mantra, “Unless you are killing plants, you aren’t growing as a gardener.” The key is how many times do you continue to try before giving up?
We’re pretty stubborn as long as we feel we keep learning from each failure. Our latest accession of this species, which came as spores from Russia’s south coast, is actually thriving in our crevice garden, where the pH is north of 8.0. It seems that the crevice habitat is the answer.
Most people are in too much of a hurry when they visit gardens and subsequently miss so many of the tiny gems in the garden. Here our clump of the South African native Ledebouria inquinata that was in full flower in the crevice garden during our recent spring open house. I wonder how many people actually walked slow enough to notice this tiny gem and its massive floral show. How about a “slow gardening” movement?