I bought what was labeled a catnip plant, but from what I read about the smell might be a catmint plant. Anyhow, I know they like sun, so originally I was growing it outside (I live in Florida). Low and behold it drew a neighborhood cat inside the fenced yard and he chomped a lot of the leaves up. So I planted it in a bigger pot and put it inside on a windowsill that didn't get much sun. It did well there, but recently I noticed some white mold stuff growing around the outside of the terra cotta pot it is in and just on top of the dirt inside. I thought maybe being in a sunnier window would kill off this mold, so I moved it. The plant must have hated me for it because almost all of the shoots wilted. I got the hint and moved it back to the shady window, but it is still wilty. What should I do?