Canna lilies have large, dramatic blooms that brighten up almost any garden. Canna lilies grow best in hardiness zones 8 through 10 and should be planted outdoor in early spring, after all possibility of frost is gone. Cannas like well drain soil, rich in organic matter. When planting, choose an area that gets plenty of sun.
Soak your canna lily seeds in warm water for 24 hours.
Remove your seeds from the water and use a sharp knife or nail file to make a small cut in the hard outer shell of each seed. This cut is known as scarifying.
Select a sunny garden location and work the soil to a depth of approximately 6 inches. Remove weeds and rake the soil level.
Add 1 inch of organic manure to the top of the soil and then work it into the top 4 inches. Rake the soil again to level it and remove any weeds or debris.
Plant seeds 1/2-inch deep and 12 inches apart when soil is warm and there is absolutely no possibility of frost.
Water well and keep the soil damp but not soggy. Watch for your cannas to appear within 14 to 21 days.
Fertilize your cannas with an all-purpose flower fertilizer after the plants have been growing for approximately 21 days.