How to Grow Canna Lilies:

WHERE TO PLANT:
Cannas love lots of sunlight, even full sun. Make sure they are planted in a location that gets at least 4 hours of sunlight per day. Cannas are surprisingly easy to grow and will tolerate a wide range of growing conditions. They like loose, well draining soil the best.

WHEN TO PLANT:
Plant in the Spring after all danger of frost has passed. In colder areas with a shorter summer season, you can start off your cannas indoors in pots 6 to 8 weeks before the start of Spring and replant them outside as soon as temperatures warm up. Canna lilies bloom from early summer to the start of the cold season (they're done as soon as the first frost hits).

HOW TO PLANT:
Canna bulbs should be planted approx 12-18 inches apart and 2-3 inches deep. The bulb should be placed with the long part horizontal to the ground with any visible eyes pointing toward the sky (although canna shoots will eventually find their way to the surface no matter which direction up they are planted!). Cover with loose soil.
If desired, cannas can be fertilized with a good quality nitrogen fertilizer and adding organic matter to the soil also helps. They need a good, thorough watering at least once a week. They are rarely bothered by insects but if infestation occurs, a rose fertilizer containing an insecticide will likely do the trick. Although its not a must (cannas will continue to bloom regardless), do remove any dead heads, old flowers or seed pods. This makes them look a lot neater and prettier!

HOW TO CARE FOR CANNAS:
Your canna bulbs will indeed multiply! Each bulb produces approximately 3 to 5 'daughter' bulbs per season. In zones 8-10 bulbs can be happily left in the ground over winter. In the Spring you can dig up the bulbs and replant the daughters to give the plants more space, otherwise you will have quite a dense clump of flowers and leaves! In zone 7 with rare hard frosts, many gardeners have had good success with mulching over. In zones 6 and below, dig up the bulbs before the first frost and store in a cool, dark and dry location (in a plastic bag with some small holes works best for moisture control). Replant the following Spring.