I have white powdery mildew on the leaves of my poinsettia
How to care for it. I live in Costa Rica and they grow here but I want to get rid of the mold. . . . how?
Certified GKH Gardening Expert
Powdery mildew is caused by a fungus. Neem oil can help with this. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm