This hardy genus contains about eighty species, most of them American and many being natives of the Pacific Coast. The perennial species form handsome specimens in the shrubbery borders, and the annual species are beautiful in the wild garden or for planting in the flower-borders. Lupins delight in a light sandy soil, thriving even in the most barren sands.
Their propagation consists simply of sowing the seeds where they are to flower and raking the ground on which the seeds have been sown. The best season for planting the seeds is in October or immediately after the first rains.
The shrubby blue-flowered Lupinus Chamissonis and the yellow Lupinus arboreus form handsome bushes from three to six feet tall and as much through the branches. They are very free-flowering; the annual species, such as Lupinus bicolor, form beautiful masses or beds. The herbaceous species are best when grown in partial shade, in the uncultivated copse, in hedge-rows or along the banks of streams. They require no artificial irrigation.