Arroyo Lupine (Lupinus succulentis) Grows 2 to 4 feet tall with blue flowers, reseeds. Fall planted, blooms spring, summer. Likes full sun, moderate water. Use for ravines, flats and slopes, hillsides, fields, and roadsides. Often seen along the roadside. Easily grown. Use 20 pounds per acre or 1/4 pound of seeds per 500 square feet.