Lupinus polyphyllus 'Westcountry™ Rachel De Thame' (Lupine 'Westcountry™ Rachel De Thame') brings bold, upright flower spires to borders and cottage-style plantings. You will get dense, pea-like blooms in late spring into early summer, held on sturdy stems above a clump of palmate leaves. This cultivar is best where summers are not excessively hot or humid, and it can be a short-lived perennial even in good conditions.
Plant in full sun for the strongest stems and best flowering, but give your plant light afternoon shade in hotter areas. You will have the best success in organically rich, slightly acidic, evenly moist, well-drained soil. Keep moisture consistent during growth and bloom, and avoid waterlogged sites. Mulch helps keep the root zone cooler and more evenly moist.
After the main flush, deadhead spent flower spikes to encourage additional bloom and to prevent unwanted self-seeding. Provide good air circulation and water at the soil line to help reduce powdery mildew risk. Taller spikes may benefit from support in windy sites.
Use this lupine as a vertical accent among mounding perennials, and enjoy it as a cut flower. It is commonly visited by butterflies, and it is generally avoided by rabbits and deer.