the white stuff could be "white fly".9 v1 ]5 r: o1 y9 Y" ?- @
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 k% f8 q& d2 C6 Q+ ^: a$ p
Hibiscus is a typical plant, show helps a lot.