Answer: Azaleas are not very heavy feeders, so if they seem to be doing well enough then you may not need to fertilize. Using a natural organic mulch also helps feed them on an ongoing basis. If you feel a fertilizer is needed, then a slow release granular form made for acid loving plants (such as Hollytone) would be fine. Read and follow the label directions. The old rule of thumb is to fertilize right after they finish blooming, but with a slow release fertilizer early spring is fine. You can also top dress with good quality compost once a year in spring or early summer.
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