the white stuff could be "white fly"., E0 s; d/ C' c0 G6 \* }! P8 T
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 M: z. _2 b. ^2 EHibiscus is a typical plant, show helps a lot.