Q.gardenia bush
It has black on the leaves. How do I get rid of it?
Downtoearthdigs
Answered on March 30, 2016
This is Sooty Mold and Neem Oil is a good treatment.
Here are some articles to help you.
https://www.gardeningknowhow.com/ornamental/flowers/gardenia/gardenia-pests.htm
https://www.gardeningknowhow.com/ornamental/flowers/gardenia/common-gardenia-diseases.htm
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