“Stuff” on Hibiscus Leaves

Question

Our hibiscus plant always has a grainy substance on the leaves. Hosing down doesn’t help. I have to rub with water very heavily to remove this ugly stuff.

Answer 1

It could be scale, or some other type of insect pest. We recommend spraying neem oil to treat them. Here is information on scale and neem oil: https://www.gardeningknowhow.com/plant-problems/pests/scale-bug-how-to-control-plant-scale.htm, https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm