Q.Black Spots
What causes black spots on oregano and also on spearmint?

Nikki
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on May 27, 2011
Are they in the ground or in a container? If they are in a container, it is likely black spot fungus. Treat them with neem oil. Here is more information on neem oil: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
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