Anonymous added on May 13, 2014 | Answered

I have brown spots on my dahlia's leaves, then they turn brown. What causes this and what shoud I do?

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Certified GKH Gardening Expert
Answered on May 13, 2014

It sounds like your plants may have a fungus. Treat the plant with neem oil. Here is more information: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm

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