hardiness trials

Taiwaniana cryptomeroides 'Independence'

Taiwania, from, wait…you guessed it, Taiwan

One of the dazzling conifers at JLBG that always leaves visitors guessing and admiring is the monotypic genus, Taiwaniana cryptomeroides. While there are many specific epithet names that commemorate countries, this Taiwan endemic is one of the only plant genera named after a country. Taiwaniana ‘Independence’ is a superb, glaucous leaf clone that hails from

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Pellaea viridis 'McLear'

Green Cliff Brake…another amazing Ferner

Ever since I had my first greenhouse at age 7, I’ve grown the tropical Green Cliff Break fern, Pellaea viridis. Never in my wildest dreams did I imagine I’d find a winter hardy form. It was not until 2005, when I visited South Africa, that we found it growing at a range of elevations from

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Lysionotus wilsonii

Lovely Lysionotus

Recently flowering in the woodland garden at JLBG is another hardy gesneriad, the Chinese Lysionotus wilsonii. This gems hails from 2,000-6,000′ elevation in China’s Yunnan and Sichuan province, where it’s found in woodland valleys. That’s near the minimum elevational range at which we’d expect winter hardiness in Zone 7b/8a, so we are thrilled that it

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Arisaema nonghinense

Jack from Nong Hi

One of the lovely surprises from the aroid collections of the late Alan Galloway, has been the winter hardiness of the “tropical” Arisaema nonghinense. This little-known jack-in-the-pulpit, which was only named in 2014, endemic from 1,500-1,800′ elevation in the Nong Hi district in Thailand’s Loei Province. For those who don’t know Thailand, it’s the last

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Eriophorum virginicum 'Take me Home'

Cotton Grass…Fluffy, not Stuffy

One plant that I’ve tried to grow for decades are the cotton grasses of the genus, Eriophorum. Actually, fourteen of the sixteen recognized species of bog denizens are North American natives. but all but Eriophorum virginicum are native so far north, they have little heat tolerance, as our trials have shown. Some species are tight

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Agapanthus 'Ever Amethyst'

Amazingly Amethyst

In full flower now is our patch of Agapanthus ‘Ever Amethyst’, from the agapanthus kings, De Wet agapanthus breeders in South Africa. This has been an exceptional performer in our trials. For us, agapanthus flower after the spring floral flush, and before the summer flowering plants begin, providing a great early summer filler. We will

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