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I woke up this morning to find a node of leaves on my strawberry mint plant covered in white spots. strawberry mint leaves with white spots

I've noticed a few other leaves nearby having the same issue, though not as prominent.

Does anyone know what this is? Should I be concerned?

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This looks like Powdery Mildew, it's a very common fungal disease.

Try pruning the affected plant parts. Additionally, try to increase air circulation around your plants and avoid watering the plants from overhead - fungal diseases thrive in humid conditions, and decreasing dampness around your plants should help.

Naturally, applying fungicidal treatments is recommended, preferably one that is specific for treating Powdery Mildew, but a baking soda solution or neem oil should help too. Source

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  • Ah, I think the conditions were perfect for it. It has been raining everyday for the past week. Thanks :)
    – ieatdirt
    Jul 3, 2023 at 14:13
  • You're welcome! Please upvote and accept my answer if it has been helpful to you :)
    – uriyabsc
    Jul 3, 2023 at 20:52

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