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Rosemary Plants

Q.Unusual Colouring On Herbs

Zone RG9 2DG | Anonymous added on May 9, 2021 | Answered

Hello, Our rosemary, sage and mint grow beside each other and are all three affected. The lemon balm is not affected. The leaves have a discolouration of yellow spots. I’ve attached a photograph which I hope shows the affliction clearly enough. Is this being caused by something in the soil?

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Certified GKH Gardening Expert
Answered on May 10, 2021

Hard to tell if this is aphids, a fungus or just a lack of nitrogen in your soil. I suggest treating them a few times with neem oil, and add a bit of nitrogen to their soil. I'm suspecting an infestation that just doesn't bother lemon balm. Here's a helpful article:

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