Seeds from Dudleya caespitosa or Sand Lettuce . Grown for its ground-hugging rosettes of colorful evergreen leaves, this perennial succulent is native to coastal California from Monterey County to Los Angeles County. The lance-shaped to narrowly oval, gray to yellow-green leaves form broad rosettes that can reach the size of dinner plates. Open clusters of bell-shaped red or yellow flowers poise on erect knee-high stems in late spring and early summer. The blooms attract hummingbirds and butterflies. Zones 9-11.