This is Lupinus densiflorus also known as Golden Lupine Aureus. This beautiful yellow Lupine grows to about 2 feet tall and lives happily in full sun or light shade. It blossoms from late Spring until early Fall. Lupine plants in general are larval host plants for the Boisduvals Blue, Melissa Blue, Silvery Blue, Sooty Hairstreak, and Afranius Duskywing butterflies and it is also the larval host for the Dryotype opina moth. This is an annual plant and will grow in all USDA Hardiness Zones.