Penstemon 'Prairie Dusk' Rose-purple trumpet shaped flower held on masses of spikes. Blooms in June and July. Dark green mounds of foliage reaching 18 to 24 inches tall and to 12 inches wide. Great for cutting and attracts hummingbirds! Full sun to light shade in average, well-drained soil, especially in winter. A light mulch in winter is recommended. Beardstongue