the white stuff could be "white fly". . S, S7 B# \3 @1 j3 EI 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.( R! t4 {5 X) g$ }0 @4 T& V& x
Hibiscus is a typical plant, show helps a lot.