Calla Lily Valley in Carmel, Calif. at Garrapata State Park. The flowers bloom January through April. (Courtesy of California State Parks, Garrapata State Park ©2018, California State Parks.

Calla lilies are perennial but in our USDA Hardiness zone 7 go into dormancy when temperatures drop into the 40s. Rhizomes need to be lifted before a freeze as they are tender and sensitive to frost.

What began with one lily plant that belonged to her mother has become a collection stretching 100 yards. It's been a natural evolution for this woman who loves painting watercolors of flowers.

Artist Georgia O'Keeffe, born Sun Prairie, WI 1887-died Santa Fe, NM 1986 Luce Center Label The waxy, long-stemmed calla lily captivated Georgia O'Keeffe in the 1920s. The calla lily was a popular ...