Azaleas are pretty flowering shrubs that belong to the same plant family as the larger rhododendrons. Thousands of different varieties of azaleas exist, and the red flowering variety is among the most stunning. This azalea prefers a somewhat shady environment and does best under filtered sunlight. If you grow your red azalea in soil that is slightly acidic and fast draining and you keep it moist, your red azalea should bloom in season.
Getting a Red Azalea to Bloom
Build a raised bed that is rich with compost for your red azalea. Plant the azalea with the root ball slightly above the top of the soil. Spread a layer of mulch, such as grass clippings, around the base of your plant to keep the area weed free and the soil moist.
Add compost to your soil every year after your red azalea stops blooming. If you want, you can also add a special azalea fertilizer, but it's not mandatory.
Water well, especially during late spring and summer; check to make sure it is receiving at least three hours of sunlight every day. Give it the nutrition it needs, especially phosphorus.
Nourish your red azalea with humus and mulch. Chemical fertilizers are rarely needed if your soil is rich and your plant receives some additional nutrition from the mulch.
Force blooming by using a low nitrogen or "blossom booster" fertilizer in late winter before buds form.
Deadhead spent flowers from your plant by pinching them off after they fade; this will encourage the red azalea to make more flowers rather than creating seeds.