prairie clover Dalea purpurea Type:native plants, perennials that last Hardiness:Zone 3 – 8 Mature Height:18-24in Light:sun (8+ hrs) Water:drought tolerant, requires well-drained soil Bloom Color:pink Bloom Time:fall, summer Foliage:green Description Cylindrical heads of unusual bright purple flowers. Plants require well-drained site. This prairie legume fixes nitrogen in garden soil. Grows 2-3′ tall in full sun. NATIVE TO THE CENTRAL US AND EAST.