Lupine plants have hand-shaped leaves and produce 12-inch to 4-foot flower spikes in a variety of colors, including pink, purple and white. Lupine seeds should be sown directly into the garden, as the seedlings are unlikely to survive if transplanted. This plant does best in soil that is slightly sandy and very well-drained. Lupine thrives in full sun, but will also grow in areas that are partially shaded.
Prepare the seed bed by removing all large rocks, weeds and grass. Loosen the soil 12 to 20 inches deep to encourage the development of a healthy root system.
Broadcast lupine seeds across the prepared soil. This can be done in spring or fall. If planting in fall, soak the seeds in a container of warm water for 24 hours before planting. Sprinkle a 1/8-inch layer of soil over the seeds. Water well, taking care not to push the seeds too deeply into the soil.
Water the seed bed whenever the soil feels dry. Once the seedlings have begun to sprout, thin them, leaving approximately 2 feet between each plant.
Feed once each month with an all-purpose organic fertilizer. Clip off the flowers as they fade to encourage new blooms to develop.
Examine the plants often for signs of insect infestation. Lupine is especially vulnerable to aphids. Treat quickly with insecticide if you suspect a problem.