Azalea houseplants are tender versions of their garden cousins. They can be successfully grown outdoors during spring and summer, but are happiest if kept indoors year round. The pink flowers bloom during late spring, and with proper maintenance, can continue until late summer. Azalea houseplants are easy to grow, but must be properly maintained to survive for multiple years.
Keep azalea houseplants in indirect light while blooming, or the flowers will fade. Move the plants to a location that receives direct sunlight after blooming has ended. Maintain a constant temperature of 60 to 65 degrees Fahrenheit.
Water azalea houseplants once per week, keeping the soil consistently moist at all times. Never allow azaleas to dry out completely, or the plant will wilt and flowering may decrease. Apply water directly to the soil to avoid splashing it on the foliage.
Feed azalea houseplants using a liquid fertilizer once every two weeks during spring, summer and fall. Apply following the manufacturer's directions for correct dosage. Do not fertilize during winter, when the plant is dormant.
Remove azalea houseplant flowers as soon as they fade to improve appearance and reduce the chance of disease. Cut off the flowers at their point of origin to minimize damage and promote the formation of additional blossoms.
Prune azalea houseplants once per year in late winter to keep improve appearance and keep them healthy. Remove any dead, damaged or excessively long limbs to conserve nutrients and maintain a compact growth habit.
Repot azalea houseplants once every two to three years to prevent the plant from becoming root bound. Increase the size of the container by 3 inches in diameter each time to allow plenty of room for root growth. Use a general houseplant potting soil as the growing medium.