the white stuff could be "white fly".! ~) T& X7 n. d. X, ~ O3 D# N; N2 u
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.0 g% E6 @4 ^1 [4 w' ~1 D4 x
Hibiscus is a typical plant, show helps a lot.