Gardenia Plants

Why Are Bottom Leaves on My Outside Gardenia Turning Black?


ssjack added on November 9, 2011 | Answered

Why are the bottom leaves of my outside gardenia turning black? We live in central FL.


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ANSWERS
Heather
Certified GKH Gardening Expert
Answered on November 14, 2011

Is it a black that rubs off? If this is the case, then this is sooty mold. It is a byproduct of a pest invasion. Sooty mold grows on the honeydew of several different pests. Treat the plants with both a fungicide (to kill the sooty mold) and a pesticide (to kill the pest).

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