the white stuff could be "white fly". ) {. T" h+ N7 R/ tI 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. ' ^2 s; E) D8 t$ l. Y" F0 F* T+ k5 wHibiscus is a typical plant, show helps a lot.