Lemon Balm Leaves Developing Dark Edges
Answered by: Conrad Richter
Question from: Mariellen Ward
Posted on: May 15, 2000

I recently purchased a lemon balm plant from your greenhouse in Goodwood, and it has begun to develop a problem I have seen on lemon balm before. The edges of the leaves are turning dark. What is the problem, and what can I do about it?

I am assuming that the plant is in a pot and is indoors. It is possible that your plant has developed a leaf blight disease. This disease is opportunistic in nature, meaning that the disease only appears when other things are wrong such as the environmental conditions the plant has been placed in. Very likely, the symptoms will disappear once you have transplanted the plant outdoors in the garden where it will get more light and more room to grow.

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