How Cold Hardy is Agave Utahensis?
Agave utahensis is known for its remarkable cold hardiness, making it a highly sought-after plant for gardens in colder climate zones. It is the species of agave found furthest north and thus is the most cold hardy agave. Unlike many other agave species, which struggle in freezing temperatures, agave utahensis regularly withstands subzero temperatures and snow in its natural habitat, where it can be found at elevations as high as 6,500 feet.
Research published by the US Department of Energy indicates that agave utahensis is the “agave species with the highest frost tolerance” and that it is hardy down to -23c/-9f. You can read that study here.
This resilience allows it to thrive even in USDA hardiness zone 5 and zone 6 if protected from excess moisture during the winter. With its ability to survive in these frigid environments, agave utahensis proves to be an exceptional choice for those seeking a cold hardy, and visually striking addition to their gardens. In the chilly UK, utahensis has even been given the Royal Horticultural Society’s Award of Garden Merit.
The USDA hardiness map above shows what parts of the country are too cold (in gray) for agave utahensis to grow and which parts of the country are warm enough (in brown, pink and purple). If you do happen to live in the “too cold” area, you can still grow the utahensis in a greenhouse, or simply bring it in for the winter.
As with most desert plants, utahensis should be planted in fast-draining soil, high in inorganic content, and once fully acclimated it can tolerate full sun—both important traits for gardeners in cool hardiness zones.
