Summer-flowering bulbs should be planted in the spring after danger of frost is past. The soil temperature should be at least 55 F. Bulbs planted before this temperature is reached may rot before they can sprout. Some tender summer-flowering bulbs, such as caladiums and tuberous begonias, should be harvested and stored before the first fall frost. Allow the bulbs to air-dry for one to two days and store them in a cool, dry place for planting next spring. When buying bulbs, always select ones that are firm and blemish-free.
Large bulbs produce larger flowers.
Variegation may occur in the flower, yellow streaks may develop in the leaves, and plants are generally smaller and weaker. Destroy all infected plants as they appear, and control all sucking insects that can transmit viruses. Aphids and thrips are common and may cause young leaves to show puckering, curling or other abnormalities. Many shapes and colors are available. Plants grown from seeds will not grow true to type.