the white stuff could be "white fly".! S x' g* p2 m6 }: B& {0 L( r6 i
I had the same problem before. It because your plant is too wet. I showed the leaves twice a day for a whole week, then the white filies were all gone.5 o% ~# x' a5 ]/ J7 `7 ?
Hibiscus is a typical plant, show helps a lot.