I have two gardenia's along my property line, next to a wooden fence. They were growing beautifully for years and reached a height of about 15'. A couple of years ago, they began dropping leaves and hardly had any blooms. I began noticing the leaves getting holes in them but couldn't see any bugs. Have fertilized with a product that is a systemic bug killer, which worked the first couple of times. However, it doesn't seem to help anymore. I have researched gardenia diseases and pest problems but my plants don't match any of the descriptions I've found. I am posting pictures in the hopes someone can point me in the right direction for a solution. The leaves get a small black spot, the spot grows and turns yellow, and then the leaf material shrivels and falls away, leaving a hole. Any help is appreciated. Thanks!
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