the white stuff could be "white fly".5 z3 \* k# g, U$ @ {
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. . G2 V3 Q& h9 ]! @' Q! w8 U6 uHibiscus is a typical plant, show helps a lot.