Dancing in the wind with the slightest breeze, Karley Rose Fountain Grass is a showstopper. Purple-tinged plumes erupt from thin, rich green foliage mid to late spring and amass for months until frost. Oblivious to pests and drought tolerant, this is one ornamental grass worthy of a place in many gardens. Yet as with all things, those that seem too good to be true have a downside and Karley Rose is no different.