If your azaleas are showing signs of needing supplemental fertilizer (they are not heavy feeders), cottonseed meal can be a good organic source. It releases nitrogen more slowly (minimizing risk of burning plants), providing a weaker stimulus that remains effective over a longer period of time.
"Cottonseed meal is a by-product of cotton manufacturing. As a fertilizer, it produces a somewhat acidic reaction; consequently, it is frequently used for fertilizing acid-loving plants such as azaleas, camellias, and rhododendrons. Formulas vary slightly, but generally, cottonseed meal contains 7 percent nitrogen, 3 percent phosphorus, and 2 percent potash. Nutrients are most readily available to plants in warm soils, but there is little danger of burn."

Yes, all your Azealeas need is some cottonseed meal and garden sulfur.

Carla17, any acid loving plant really likes cottonseed meal.

It is one of the main ingredients in Holly-tone. It is much more complete with iron for the leaves, phosphates for blooming, potash for strong roots, calcium for strong plants, sulfur for acidity and many minor and trace elements. Here is what is in Holly-tone:

Derived from: Dehydrated Manure, Feather Meal, Crab Meal, Cocoa Meal, Corn Gluten, Cottonseed Meal, Dried blood, Sunflower Meal, Kelp Meal, Alfalfa Meal, GreenSand, Rock Phosphate, Sulfate of Potash, Humates, Ammonium Sulfate, and Triple Super Phosphate.

It supplies:
Total Nitrogen (N) ............................................................. 4.0%
      1.90% Ammoniacal Nitrogen
      0.55% Other Water Soluble Nitrogen
      1.55% Water Insoluble Nitrogen
Available Phosphate (P2O5) ............................................. 6.0%
Soluble Potash (K2O)....................................................... 4.0%
Calcium (Ca) .................................................................... 3.0%
Total Magnesium (Mg)...................................................... 0.5%
      0.3% Water Soluble Magnesium (Mg)
Sulfur (S) .......................................................................... 5.0%
      5.0% Combined Sulfur (S)
Boron (B).......................................................................... 0.02%
Chlorine (Cl) ..................................................................... 0.1%
Cobalt (Co) ...................................................................... 0.0005%
Total Copper (Cu)............................................................. 0.05%
Total Iron (Fe) ................................................................... 1.0%
Total Manganese (Mn)...................................................... 0.05%
      0.01% Water Soluble Manganese (Mn)
Molybdenum (Mo)............................................................ 0.0005%
Sodium (Na)..................................................................... 0.1%
Total Zinc (Zn) .................................................................. 0.05%