Q.Black Spot Mildew on Gardenias
How do I get rid of and control black spot on my gardenias?

Nikki
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on June 5, 2011
I would recommend using neem oil. It will treat the fungus with the added bonus of keeping pests away, which gardenias indoors are also prone to. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
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