the white stuff could be "white fly". 9 _3 _9 y7 `- M: Z4 j$ GI 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 a+ B$ h1 |4 O6 x* C" S% Z
Hibiscus is a typical plant, show helps a lot.