Oriental Fountain Grass (Pennisetum orientale 'Karley Rose') could win an award for having the most intricate and stunning tassels of rosy plumes. Expect the purple flower spikes to appear in summer and last through the warmest months of the year and often into early fall. Oriental Fountain Grass 'Karley Rose' will add a delicate and delightful textural element to your mixed border, prairie garden or perennial bed. After establishment, this plant does just fine on its own and can withstand periods of drought and cold winters to zone 5.