Agave flexispina is a rarely grown agave, related to Agave palmeri and Agave shrevei, that struck my fancy when visiting the Ruth Bancroft Garden in California. Hailing from 4,500' to 7,500' in the Mexican states of Chihuahua, Durango and Zacatecas, Agave flexispina has shown great winter hardiness in our trials. The powder blue leaves with long red spines form rosettes that are often solitary but will offset occasionally once established. In cultivation, expect the clumps to reach 18" tall x 3' wide. Carl Schoenfeld tells us that in west Texas, Agave flexispina was unblemished down to 0 degrees F, so we think this gem holds great promise for garden use in warm temperate climates.