Wild lupine (Lupinus perennis) is a hardy, easy to maintain native plant that also improves the soil quality by fixing nitrogen. It is the host plant of the endangered Karner blue butterfly and an important nectar source for bees and butterflies. Wild lupines prefer sandy soil and are quite happy in ditches and disturbed sites. Lupines do not like to be transplanted. If wild lupines are pollinated by ornamental varieties, blooms can also come up in pink or white.
Cold, moist stratification and scarification required. Scarify by rubbing seeds with sandpaper to make a small scrape in the seed coat, then mix with moist substrate (vermiculite, perlite or moss). Place in a plastic bag and refrigerate for 6-8 weeks. Sow seed at 1/4 inch depth. Do not let seedling dry out while it is establishing.
Scarify seeds then sow directly outdoors in late fall to overwinter.