Elegant Calla lilies are popular in wedding bouquets, containers and garden beds. They’re undemanding plants, needing little more than well-worked soil that drains easily and a sunny site. In warm climates, they can take part shade. Callas sold in gift pots often wind up in the compost pile after the flowers fade, but the bulbs are perennials and can be planted outdoors. Hardy in zones 7-10, the plants can grow 24-36”.