Is there a certain neem oil that can be used on Hibiscus? I read somewhere that certain plants are too tender, and neem oil may burn the leaves.
Neem Oil on Flowering Plants
Certified GKH Gardening Expert
It is true that hibiscus can be sensitive to oil applications. I think this applies to all oils, not just neem. Because of this, you may want to dilute the neem oil by mixing it with water and a bit of dish soap, or choose a product where it's already diluted. Then, test the neem oil mixture on a small area of the plant, wait a few days, and if there's no damage you can spray the whole plant.