A calla is a flowerlike herb with a bell-shaped leaf that is typically mistaken for the plant's flower. The calla's flowers are actually the small blossoms inside the bell-shaped leaf. Calla lilies are one of the most popular types of calla. The calla lily, or zantedeschia, has a bell-shaped leaf that is about 10 inches long.
Plant your calla lily in late spring, or early summer. Choose a location with about 25-percent shading. Calla lilies can tolerate full sunlight with sufficient watering.
Add organic material like wood chips or bark to the soil to keep it cool, moist and discourage weeds. Calla lilies prefer humus-rich soil. Add a 2-inch layer of mulch made from wood chips, ground bark or other organic material to the top of the soil.
Plant the calla lily rhizome about 2 inches deep, and space the plants about 18 inches apart.
Keep the soil moist. Calla lilies can tolerate wet ground, which makes them ideal for planting along the edge of ponds.
All parts of the calla lily are toxic and should not be digested by pets or humans.