From the Mexican desert comes this handsome blue prickly pear with lemon yellow flowers and long black spines. When stressed by drought or cold, it turns glowing purple.
All prickly pears love hot dry summers, need minimal water and can stand a fair amount of cold. In the Sonoran desert where this one comes from, it sails through winter frost, even an occasional snowfall, and is hardy in zones 8-11. Happily, the two factors that bring out the purple color are cold weather and drought.