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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comI have 3 bushes. Only one is blooming. Others have black spots on leaves. What should I do?
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1 Comment To "Azaleas"
#1 Comment By Nikki On 04/05/2014 @ 9:37 am
If the spots are on the outer side of the leaves and surrounded by a yellowish looking halo, then it’s most likely the result of a fungus, which can be treated with a fungicide. If the spots are on the backside of the leaves and resemble specks or dots, then it’s likely caused by a pest of some sort, like lacebugs. I would treat the shrubs with neem oil, which is both an insecticide and fungicide. Here is more info: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm [1]