Q.our gardenia bush has black film on leaves, what could this be
Our gardenia has black film on leaves. What could this be?

Nikki
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on March 14, 2012
It sounds like you have sooty mold. It is normally a sign of a pest infestations. I recommend treating the mold and pests with neem oil. Here is some information that can help you:
https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
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