hardiness trials

Juniperus cedrus (Canary Island Juniper)

The Cedar-like Juniper – Juniperus cedrus

Living in the community of Juniper Level, there should be little surprise that we have a significant collection of junipers from around the world. One of the rarest and most unusual is Juniperus cedrus (Canary Island Juniper). This native to high elevations in the Canary Islands, almost went extinct, due to overharvesting, which is now,

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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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