Grapefruit Trees

Black Growth on Leaves

Anonymous added on March 7, 2011 | Answered

My gardenia plant and grapefruit tree have a black growth covering the leaves. What is it?

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Certified GKH Gardening Expert
Answered on March 8, 2011

Your problem could be attributed to sooty mold, which is often caused by pests. This article will help you learn more:

You can treat this with neem oil. It gets rid of both the fungus and the pests that cause the fungus. Here is more info on neem oil:

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