Hi! I’m struggling with my Sage. It was doing well for a long while and now it’s developing these spots. The pot has drainage and the soil is neither too dry or too wet. I’ve been flowing the apps water schedule. I thought I saw some bugs on it but I don’t see them anymore. I have neem oil but haven’t sprayed that on here yet. It’s in a pretty full sun location. Not sure what else to say. Does anyone know what’s going on?
That is powdery mildew. Potassium bicarbonate is recommended, but any fungicide should work. Increasing air flow or light can help prevent it, but some plants are just prone to it (oak trees get it a lot and are pretty unbothered by its presence.) There are also powdery mildew resistant varieties of many plants, so you can search for those when shopping
2 likes Is it possible to make any fungicide at home?
1 likeThe most common household fungicides would be hydrogen peroxide (3%), neem oil, or sometimes isopropyl alcohol (70%. Alcohol is harsher and can burn the plant.) Since you already have neem, you can treat with that
2 likes