Leadplant. Spires of purple flowers in early- to mid-summer look wonderful with other summer-blooming U.S. natives such as rudbeckias, echinaceas, and hypericums. Amorpha canescens behaves similarly to other "sub-shrubs" such as Russian sage (Perovskia) and bluebeard (Caryopteris x clandonensis), producing its flower spikes and gray divided leaves on woody 30-inch plants that typically die partially to the ground in winter. It returns to full height when it resumes growth in mid-spring. This bee and butterfly magnet appreciates full sun and light to moderate soil. Zone 3. Propagated from plugs. Deep 3.5-inch pots.