They are intolerant of frost and do not do well in cool soil. Because of this, it is customary to pot the bulbs and grow them inside at a constant 65 degrees F. Move the pot outside in June and take it inside in the fall. Store in a dry condition until spring, when it is again started indoors. They do best in shaded or semishaded areas well supplied with humus and moisture. After frost, dig the bulbs and store in a cool place to replant in the spring.
Callas are available in colors ranging from white to yellow to pink.
They produce from roots planted in the spring and should be handled similarly to tuberous begonias. Cannas range from ivory and yellow through rose and salmon to crimson and scarlet. The foliage is either green or bronze. Plant the roots 6 inches deep and 18 inches apart in late spring. After frost kills the foliage, dig and store the roots over winter much the same as dahlias.