Melonade

My bamboo plant has developed a nasty crustiness around the rim of its container. I've never been an expert at plant care, but this little plant has been doing well for months now. If it dies, my desk will be sad and lifeless again, and I can't have that. I still water my plant as per the instructions on the plastic card. I leave it in just enough light (but not too much, I think). It was doing so well, and now the bright green stalks around the rim have spots of crusty brown bits. Eww. And some of the tips have turned yellow. Maybe its getting too big for the ceramic planter. Maybe the curse has finally reached this plant, and it will have to go the way of my other horticultural attempts.