My 7ft by 5ft rhodendron only has 1 to 2 flowers and then, only every 2 to3 years. A similar one next to it does flower. I have tried miracid, sulfur, special azalea food, spading around it to trim roots everything. It has no diseases that I can see and looks very healthy. Also, the soil in my garden is somewhat acidic due to lots of oak trees. (it is very sandy though) What am I doing wrong?
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