Canna lilies (Canna x generalis) are perennial tropical flowers. The large, flat leaves resemble a banana plant leaf. These tropical-looking leaves are green, brown, maroon and bronze variegated in white, cream, pink and red. Cannas reach 2 to 10 feet tall with large red, orange or yellow iris-like blossoms. Canna lilies are used for dramatic color spots, mass plantings, borders and as container plants. Cannas are planted outside year round in zones 8 to 12. In other zones, they need special winter care.
Dig the clump of canna lilies up after a hard fall frost has blackened the leaves. Push the shovel under the canna lily and lift it out of the ground.
Pull the canna plant apart carefully without damaging the roots. Shake off most of the soil.
Cut the leaves and stems back with a sharp knife to 2 to 3 inches above the roots. Rinse the roots off gently with a hose.
Lay the canna lilies in a shady, protected area for 24 hours to dry.
Bury the trimmed and dried canna lilies in a box of peat moss. Store for the winter in a dark area with a temperature range of 40 to 50 degrees Fahrenheit.