the white stuff could be "white fly". ) }' M5 J4 T/ I/ t u5 l' t: lI 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. + m6 `* ?) x; x" i, k" R9 u `( THibiscus is a typical plant, show helps a lot.