Bulbs
About
Bulbs and other bulb-like structures, like corms, tubers, and tuberous roots, spring forth each year with vibrant flowers. While many bloom in the spring, different species can be found flowering throughout the entire growing season in Iowa yards and gardens. Learn about selection, planting, and care of bulbs.
Planting and Caring for Tender Perennials
Tender perennials are attractive additions to the home landscape. Since they are not reliably winter hardy in Iowa, tender perennials must be planted outdoors each spring. Tender perennials include gladioli, dahlias, cannas, tuberous begonias, caladiums, and calla lilies, among other plants.
Frequently Asked Questions
Bulbs Experts
Aaron Steil
Consumer Horticulture Extension Specialist
Selection and Care of Bulbs
Tender Perennials
You may be surprised to see that the wax shell is now larger than the bulb inside. This is because stored carbohydrates in the bulb were used to produce flowers. With no water or soil available, the plant has a greatly reduced ability to replace those food reserves. This reduction in carbohydrates stored in the bulb causes it to shrink significantly in size. This smaller bulb will require special care to recover and grow large enough again to produce a new flower stalk next year.