Gardenia Leaves Turned Black

I have two gardenia bushes planted outside that produce a lot of blooms. Suddenly the leaves have turned black with a crispy black film that looks like it is peeling off on some of the leaves. What is the cause of this, and is there something I can do to correct it?

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1 Comment To "Gardenia Leaves Turned Black"

#1 Comment By Nikki On 03/07/2011 @ 8:16 am

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 ^[1]
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm ^[2]

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URLs in this post:

[1] https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm: https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm

[2] https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

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