Bee Balm is a plant of moist thickets and streambanks, so try to give yours a moist spot, and not too much blazing sun. The other big issues with this species is mildew. Without good air circulation, Bee Balm is subject to the dusty grey mildew that also attacks tall garden phlox. If it starts on your plants, run to the garden center and get the simple spray that's always available to control it.