gardenia covered with black growth - Knowledgebase Question

Avon Park, fl
Avatar for svblackburn
Question by svblackburn
July 5, 2005
What takes the black growth off my gardenias. It
is on the leaves and the stems.

Answer from NGA
July 5, 2005

That is sooty mold growing on honeydew a substance secreted by various insects such as whiteflies, scale or aphids.

If you wet the bush thoroughly and then spray with an insecticidal soap spray, let sit for 15 minutes then rinse, the sooty mold should flake off as it dries off. A strong blast from a nozzle can also help remove it if you give it a little time to sit wet and soften up a bit.

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