the white stuff could be "white fly". ! F8 o6 {& O; k; T- s& S R. d4 s1 t( LI 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.* Q7 M; L& M' P/ _! k
Hibiscus is a typical plant, show helps a lot.