hardiness trials

Mandragora turcomanica

The Mandrake Lives…Quietly, for Now

The legend of screaming mandrakes of the genus Mandragora is enough reason to grow these fascinating members of the Solanaceae (tomato, potato) family. I’m always reminded of Screamin’ Jay Hawkins 1956 classic, I Put a Spell on You, every time I’m working nearby. We’ve actually tried all four species in the genus, but so far

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Picea morrisonicola

Morrison’s Spruce

It was on a 2008 expedition to Taiwan, where I met the Taiwan native spruce, Picea morrisonicola. This amazing plant was named in honor of its native habitat on Mt. Morrison, which was, as was the colonialistic habit at the time, named for English missionary, Robert Morrison (1782-1834) . Today, the mountain is known as

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Agave parryi ssp. truncata 'Hardy Boyz'

Truncating a Hardiness Project

One of the most popular garden specimen century plants has long been Agave parryi subspecies truncata. Due to their distribution in the Southwest US and Mexico, the hardiness of the various populations varies tremendously. These small (relatively speaking) century plants are mass-market landscape staples in warm temperate and frost-free parts of the desert southwest. Try

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Aloe grandidentata

Big-tooth Medicine Plant

Aloe grandidentata has been a lovely surprise in our hardiness trials for the genus. This caespitose (doesn’t grow on a stalk) species forms 1′ wide dull green rosettes, spotted white, that spread via short underground rhizomes. The plant in the photo below is only 2.5 years old from a single division. We’d killed this twice

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Acantholimoni halophilum

If Life gives you Climatic Lemons, try Acantholimon

Despite a summer with a month of incessant rains, our patch of Acantholimoni halophilum continues to thrive. This native to very dry regions of Central Turkey should not have a chance in our hot, rainy summer climate. This shows how habitat creation can can often serve to mitigate the effects of weather on plants from

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Osbeckia stellata var. crinita 'Cangshan'

Osbeckia Stand

We have long adored plants in the Melastomataceae, which are primarily represented in commercial horticulture by the genus, Tibouchina, and our native Rhexia. We have long searched our other members of the family that might have good winter hardiness, but with a less aggressive running habit than our native rhexias. In 2020, we obtained seed

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Veratrum mackii var. mackii

Corn Lilies…Been there, Killed that

We’ve long admired the woodland genus Veratrum, for both their large, pleated, orchid-like basal foliage, and also for their tall flower spikes. Having grown fifteen of the twenty-seven known corn lily species, we can confidently say that fourteen of them don’t like our hot, humid summers. The lone survivor from our years of trials is

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Hans Hansen with Kniphofia trials

Magic Hans

We wanted to publicly recognize our friend, plant breeder, Hans Hansen of Walters Gardens, who was just granted his 516th plant patent. Of those incredible numbers, 18 patents came when he worked for Shady Oaks Nursery, and 498 were granted since he moved to Walters Gardens in 2009. To give you some perspective, only six

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