chiggerbit wrote: Are they actually whiteflies, by chance? If they're what I think, they're about the same size as gnats, but white.
No, they're little tiny black flies. Did try the honney/beer combo, not one drowned gnat. Bah. I did notice, however, that when I was misting my plants, there was webbing around the leaves. Spider mites, too, maybe? My other plants don't seem to be affected though, just my gardenia. It's also lost quite a few leaves.