Leaf mold from the woods and composted leaves are satisfactory. Sawdust is used by a number of Alabama nurserymen. However, using sawdust may rob the soil of its nitrogen supply during the first and second growing seasons. If this happens, the leaves will turn a light yellow. This discoloration can be corrected by light applications of nitrogen during the growing season, in addition to regular fertilization.
Peat moss is best to use, followed by pine bark, leaf mold, and then sawdust.
Planting Before planting, space plants out based on their ultimate mature size. A common mistake is to plant azaleas too close together. The result is plants that lose their character, are harder to maintain, and are more prone to insect and disease problems. Water azalea plants in the container to increase plant water content before planting. If you are planting a bed of azaleas, put 5 to 6 inches of organic matter on the surface.