This is Lupinus polyphyllus, Streamside Lupine, large-leaved lupine, big-leaved lupine, many-leaved lupine, garden lupin, Common Lupine, Blue-pod Lupine, Blue Bonnet. This butterfly plant grows in the full sun or the partial shade, but the butterflies like it better in the full sun unless there is a lot of wind in that spot. This plant is larval host to, brace yourself for this list, the Acmon Blue, Melissa Blue, Afranius Duskywing, Wild Indigo Duskywing, Shasta Blue, Sooty Hairstreak, Lindseys Skipper, Frosted Elfin, Silvery Blue, Boisduvals Blue, Persius Duskywing, Arrowhead Blue, and Queen Alexandras Sulphur butterflies. It is also the larval host plant for the Dryotype opina moth. USDA Hardiness Zones 3 to 7