How to Grow Indoor Azaleas
- 1). Buy your azaleas from a reputable breeder or plant nursery. Look for a plant with a few blooms and lots of buds with dark green leaves.
- 2). Place your azaleas in a cool room or porch with a temperature between 55 and 60 degrees Fahrenheit. Cool temperatures will prolong blooming. Choose a location with lots of sunlight, but avoid subjecting azaleas to direct sun, especially in the afternoon. Intense midday sunlight will damage the flowers.
- 3). Water your azaleas frequently, always keeping the soil moist. Dirt should constantly feel damp to the touch. When azaleas are not in bloom, mist the leaves with a spray bottle once per day. Tap water is fine for misting and watering.
- 4). Remove dead flowers by gently pulling them away from the plant. Discard deadheaded blooms, and clear away any dead flowers that fall into the dirt.
- 5). Fertilize your flowers once a month with an acidic houseplant fertilizer. Look for a fertilizer with sulfur, or one that is labeled "acidic." Stop fertilizing when azaleas are in bloom, and resume fertilization when all the flowers have died.
- 6). Repot your azaleas when they become overcrowded, in late summer or early fall. Most azaleas will need repotting every 2 or 3 years to a slightly larger clay pot. Use a peat-based potting soil in the new pot and transfer the azalea along with its root system to the new container. Hold the azalea around its base and gently tip the smaller pot upside down. The azalea and its roots should slide easily from the pot, and can be placed in the larger pot immediately. Cover the roots with potting soil and pat the dirt around the base of the plant.
Source...