Feed your Azaleas every two months with an acid type fertilizer (mir-acid) starting from the onset of new spring growth, until late summer. If chlorosis occurs (yellow foliage with green veins), treat plants with a product containing chelated iron.
Azaleas need and thrive in acidic soils. Ideal PH is 4-5.5. Always take a soil test to determine PH before planting these plants in your lawn. Once Azaleas are established and you have reached the correct PH levels, you may need to fertilize as much.
Good fertilizers for Azaleas are: – Azalea/Camellia food, Blood or Bone meal and Miracle Grow Mir-Acid.