By Adam Black
Another highlight in our nursery inventory and our plant of the month, is a regularly asked- about specimen on our Peckerwood Garden tours. This distinctive and mysterious yucca is unlike any other, with a lot of conflicting information surrounding its true identity.
Originally described in 1870 from a cultivated plant, more recently folks have suggested it could be a hybrid of natural or garden origin, but it may be a naturally occurring species – I don’t know if anyone really knows for sure.
They can be seen growing staked for vertical growth near the Pool Plaza.
Yucca desmetiana may want to creep along the ground when the stems get too long_ or they can be staked up.
Yucca desmetiana  may want to creep along the ground when the stems get too long, or they can be staked up.
Adding to the confusion are a variety of names it has been offered under in cultivation, including Yucca x desmetiana (reflecting the hybrid theory), Yucca aloifolia ‘Purpurea,’ Y ucca samuelii, and cultivar names including ‘Blue Boy’ and ‘Spellbound,’ all appearing to be the same plant. Though there are reports of it flowering in cultivation, I can’t find any photos, and to my knowledge it has never flowered here. Its chalky blue-green foliage displays purple blush on the new foliage, which intensifies after some winter chilling. Unlike many other species, this yucca has soft rubbery leaves that won’t result in loss of blood. A smaller-statured species, it starts with an erect stem that will produce a cluster of additional stems from the base, but with poor structural integrity it will eventually start leaning under its own weight and soon be scrambling in a twisting manner along the ground, which can create an interesting effect spilling over rocks, especially when it produces multiple stems. John made an interesting grouping of them near the pool plaza where they are staked up, but when they get too tall and lanky for his liking they get cut back to allow new stems to take their place. It is also great for containers, and maybe even a large hanging basket when it starts creeping around.
Its main requirements is sun to partial shade in well-draining soil. It easily tolerates our region’s extremes of heat and cold without any issues. Come purchase one from our nursery while they last.
The chill-intensified purple blush that fades somewhat when the temperatures warm.
The chill-intensified purple blush that fades somewhat when the temperatures warm.