Canna Flower Care -Despite their exotic appearance, cannas don't need to be pampered. They only require a lot of sunlight and healthy, wet soil. -Although cannas can grow in partial shade, a full-sun location is preferable. Select a location that receives at least four hours of direct sunshine every day. Sunlight in the early morning or late afternoon hours is best. -Preparation is key before planting, so loosen the soil and add a 2- to 4-inch layer of compost. -When the temperature rises over 59 degrees Fahrenheit, the leaves begin to change color. -When the rainfall is less than an inch each week, make sure to water your cannas, which have a lot of broad meaty leaves. Use water liberally when it's dry. -Cannas don't care what kind of fertilizer you use on them. There is little care required to keep cannas blooming during the summer months. To give your plants an extra push, you may apply a 5–10–5 or 10–10–10 fertilizer to your soil in the spring and again during the growth season. If you want to feed your cannabis plants organically, consider using fish emulsion fertilizer, which has a greater nitrogen content. Cannas' average height tends to rise in response to higher nitrogen fertilizer levels. There are several choices for feeding cannas if you have some rose or tomato food on hand. -You may help keep the soil moist by mulching the area surrounding your cannas, too. -If necessary, stake the taller variety. -To encourage re-blooming, remove faded blooms from the plant. -Cut the flower stalk and any associated leaves to the ground after it has been deadheaded numerous times and is no longer producing blooms in order to let surrounding cannas catch more light and blossom themselves. The leaves will survive until the first frost if you opt not to clip the stems back.