Canna lilies can grow in ponds with their roots submerged. They make a colorful addition to any water garden. Simply set the pot underwater on a pond ledge, or position a container as a marginal pond’s edge plant. This variegated canna is Tropicanna canna.
Toucan Scarlet canna is a smaller version of the classic canna, growing 3 to 4 feet tall. It’s a perfect size canna for container gardens. Here it’s planted with Vermillionaire firecracker plant (orange flowers) and purple annual salvia.
Canna lily plants explode with color from striking leaves and exotic flowers. This trio of canna lily varieties adds vivid color to any planting: Tropicanna canna (striped leaves and orange blooms), Tropicanna Gold (green and yellow striped leaves and yellow and orange flowers), and Tropicanna Black (dark leaves and red blooms).
Count on canna lily plants to add vertical interest to planting beds. Here, Tropicanna canna lily and Tropicanna Gold canna lily tower over annual flowers red celosia and gold melampodium. Choose annuals with flowers that match the leaf colors of canna lilies for an eye-catching display.
A calla lily is another popular plant that grows from a rhizome. Other examples of rhizomes: canna, bearded iris, ginger, bamboo, lily of the valley. When growing rhizomes that aren’t hardy in your zone, dig and store them over winter. Wait for frost to kill (or at least damage) leaves. Dig up rhizomes and cut off leaves. Let a 1- to 2-inch stem stub remain. Cure the rhizomes in a warm, dry place for several days—until cut surfaces are dry.
True bulbs, corms, rhizomes and tubers all have one thing in common: They each need a dormant or rest period following their time of active growth and bloom. Some bulbs need a summer dormancy (tulip); others rest in winter (canna). You can grow any type of bulb in your garden as long as you provide the right dormant period. That’s why northern zone gardeners dig tender bulbs, such as calla lily or canna—to give them a winter dormancy. Understanding how true bulbs, corms, rhizomes and tubers grow helps you to give these bulb beauties the TLC they need to thrive and blossom, year after year.