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Kdh22379 added on April 6, 2018 | Answered

What could be the cause of black rings on leaves?


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ANSWERS
BushDoctor
Certified GKH Gardening Expert
Answered on April 7, 2018

Although some plants do this, naturally, it could be a fungal infection. Did this recently start, or has it been like this since the beginning?

As a preventative and treatment I recommend using a small amount of wettable sulfur, and dolomitic lime. These will help take care of the issue. If it does not come back on the new leaves, then the problem is solved. If it does, then it could be that the plant will naturally have these.

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