Gardenia Plants
Q.

gardenia bushes

Zone 10 | cdo8447 added on February 24, 2012 | Answered

My gardenia bushes have a black film on the leaves. I can wipe it off with my fingers. What causes this and how do I get rid of it?

A.
A.Answers to this queston: Add Answer
Nikki
Certified GKH Gardening Expert
Answered on February 25, 2012

This is sooty mold. It happens when the plant gets a pest infestation. I would recommend using neem oil, as this will get rid of the sooty mold fungus and kill the pests. Here is some articles that will 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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