will neem oil harm hibiscus
My hibiscus tree has some sort of fungus. I would like to treat with Neem oil; however, I want to ensure that it is safe for the plant.
I've never heard of any plant that was harmed by neem oil. However, most of the people recommending neem as a fungicide are the marketers themselves -- garden people generally use neem as an insecticide. Here are some other fungicide options: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm