Hibiscus tree wilting???
We have a tropical hibiscus tree that is about 3 or 4 years old. It is in a good size pot, maybe 18 inch diameter. We have kept it indoors for the past year. All of a sudden, about a week ago, all of the leaves starting wilting. It has been getting slowly, but progressively worse. It has not lost any leaves (or at least not any more than normal) and the leaves aren't yellowing at all.
We water the plant about once a week, enough to moisten the whole pot, but not so much as to have any standing water in the saucer. We put one of the plastic mulch rings around the the tree about 4 months ago due to our now 1 year old's fascination with the dirt.
I lifted this mulch ring up and noticed a few small patches of a yellowish mold onthe top of the soil. As of today (Sunday, March 8) this has been going on about a week but the leaves are not yellowing or dropping yet. They are severely wilted though.
IS this plant a goner or can it be saved? Would the mold be causing the leaf wilt and what could we have done to prevent this mold?