To grow azaleas, choose a location with dappled sunlight, and work pink bark into the top 12 inches of soil. Azaleas grow well in acidic soil. If necessary, add enough agricultural sulfur to the soil to bring the pH to 4.5 to 6 before planting. To ensure the amendments improve the soil before planting, add the pine bark and sulfur in the autumn, and plant the flowers the following spring.
In regions with cool summers, plant azaleas in full sun if dappled sunlight is not available. If the foliage begins to turn brown, move the plants to a slightly shadier location. In regions with hot summers, plant the flowers in a shady location, and provide the flowers with additional water to prevent heat damage.
Provide the flowers with at least 1 inch of water weekly, and water deeply if the leaves begin to droop in hot weather. A layer of mulch around the base of the azaleas is recommended to conserve moisture and to improve soil quality.
Curled, twisted, discolored or brown-tipped leaves often indicate a nutrient deficiency in the soil, while short-lived blooms occur when the flowers receive too much direct sunlight. After the azaleas are well-established, prune several branches off the plant while blooms are present. Prune the plant heavily in the spring before new growth appears.