Callirhoe involucrata Purple Poppy Mallow Description This prairie native has bright magenta cup-shaped flowers with trailing habit. Easy to grow and perfect for sunny dry sites. Blooms forever! Well, from late spring until fall, anyway. Winds its way through your garden. Characteristics Hardiness Zone: 3-6 Light requirements: Sun Height: 6" Native: Yes Sizes & Prices Size: 1 GALLON $13.98 Other Information All Callirhoe Callirhoe involucrata Purple Poppy Mallow Zone: 3-6 Sun HT: 6"