Lupins are short, pea-like flowers that love the cool weather of early spring. Their flowers can be blue, yellow or white and begin to bloom in early summer. Plant seeds of lupins in spring after the soil has warmed and all danger of frost has past.
Choose a spot in the garden that is in full sun to part shade. Soil should be moist with good drainage. Lupins will grow best in a slightly acidic soil.
Prepare the planting bed. Spread a 2- to 4-inch layer of peat moss on the surface of the soil in the planting bed. Incorporate it into the soil by turning it over with a spade. Rake the soil smooth.
Plant lupin seeds 2 to 4 inches apart in rows 18 inches apart for traditional row spacing or 3 inches apart in all directions for intensive spacing. Push the large seeds into the soil so they are planted about 1 inch deep.
Water the planting bed thoroughly with an overhead sprinkler or a soaker hose. Continue to provide lupins with the equivalent of an inch of rainfall per week.
Cultivate to remove weeds until the lupin seeds germinate in approximately 7 to 14 days.
Spread a 2- to 4-inch layer of organic mulch in the planting bed after the lupins have germinated. Use buckwheat hulls or shredded bark and spread it carefully around the seedlings so you don't crush them.
Thin lupin seedlings when they are 2 inches tall so they stand 6 inches apart in all directions for intensive spacing and 6 to 8 inches apart for row spacing.
Fertilize lupins by spreading granulated fertilizer around and among the plants when they are about 6 inches high. Apply fertilizer following the manufacturer's recommended rates of application.