the white stuff could be "white fly".) [+ f8 Y' p8 M3 }0 t6 P
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.1 e" K& {& e5 w+ i6 H
Hibiscus is a typical plant, show helps a lot.