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The type of shade impacts the health and flowering of the canna. They may grow poorly in deep shade. Cannas grown in light shade receive partial sunlight and bright shade, which may not impact them greatly. Dappled shade allows some sun to reach the cannas.
Plant the rhizomes 3-4 inches deep and 1 1/2 to 3 feet apart. Cannas grow best in full sun and hot weather, providing they have adequate moisture and a soil high in organic matter. They will bloom in a warm site that gets part day sun, such as along a house wall. They bloom mid-summer to frost.anna lilies or cannas (Canna x generalis) are native to tropical and subtropical areas. They are not hardy in Minnesota. Like callas, their rhizomes must be dug up in the fall after frost has blackened the foliage. Cannas grow 1 1/2 to 5 feet or more, depending on variety.