the white stuff could be "white fly"." b( a/ T+ u2 r9 J! R- t3 X. w
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. # a. T9 v4 G$ G0 s1 K/ h& n* _8 rHibiscus is a typical plant, show helps a lot.