My indoor pink flowering begonia has a white powdery mildew on all the leaves and has not flowered for ages. Is there a cure?
Begonia Indoor Flower
Certified GKH Gardening Expert
This article should help with that: https://www.gardeningknowhow.com/plant-problems/disease/powdery-mildew-homemade-and-organic-remedies.htm You can also try neem oil. In addition to being an effective organic insecticide, it's a great fungicide. Here is more information: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm