Angel wing begonias are known as cane begonias for their bamboolike stems. They are among the largest of the begonias, reaching 15 feet when grown in the ground. The plant gets its name from the unusual angel-shaped leaves. The delicate little flowers come in many pastel colors and bloom throughout the year when grown in containers. Angel wing begonias are tender perennials and are hardy only in USDA planting zones 10 and 11; however, they are common houseplants in every zone.
Choose and area with dappled sunlight or morning shade and late afternoon sun, as direct sun will burn the leaves of the plant. The area should have full protection from wind and be high enough to drain well. Plan planting for spring when the temperature of the soil reaches at least 50 degrees Fahrenheit.
Dig a hole three times the diameter of the container you purchased the plant in and 10 inches deep. Clean the dug-out soil of all weeds, grass and stones. Amend the soil by mixing one part peat moss and one part compost to one part soil. Fill the hole back up with the amended soil.
Dig a hole in the center of the amended soil 4 inches deep and the width of the container that holds the plant. Carefully remove the begonia from the container, and gently knock off most of the soil around the roots.
Place the root ball into the planting hole. Fill in around the plant's roots with the soil, and hand tamp down firmly. Water thoroughly to settle the soil. It may be necessary to add more soil after it settles to keep it level with the surrounding ground.
Water to keep the soil moist for the first week after planting. Afterward, water ½ to 1 inch deep when the soil is dry. Begonias prefer slightly dry soil to overwatering.
Sprinkle a slow-release fertilizer on the soil around the plant once there is growth. Water the fertilizer into the soil well. Begonias should be fertilized from spring through fall and allowed to rest through winter. Follow the manufacturer's directions on how often to fertilize and the amount to apply.
Prune dead branches whenever needed. Cut the plant back to keep its shape and the desired size in the fall. Place cuttings in moist soil so that they can root and form new plants. Begonias are quite willing to propagate.