Plant lupine seeds by starting them in a moist plastic bag, soaking them in warm water and planting them in 1/8-inch deep holes. Prior to planting, prepare the soil by loosening the top 12 to 20 inches of dirt and breaking up any big clumps.
Prepare the seeds for planting by chilling them in a resealable plastic bag on top of a damp paper towel for seven days and then filing off one side of the outside of the seeds. Soak the prepared seeds in warm water for three hours before transferring them outdoors for planting. Wait until the soil warms to between 55 and 70 degrees Fahrenheit before this step.
Choose a planting site with well-drained sandy or gravelly soil and access to plenty of direct sunlight. After tilling the soil, work in 2 to 4 inches of manure before smoothing the area for planting. Plant the seeds in shallow 1/8-inch holes, or place them on top of the soil, and cover them with a 1/8-inch layer of soil. Sprinkle the seeds with water, and do so consistently for the first two weeks to two months or until the seeds germinate.
Water the seedlings well only after the soil dries out. Mulch the area around the seedlings with 2 to 3 inches of bark chips or other natural products. Regularly deadhead faded blooms.