Cool weather annual. Easily grown in rich, consistently moist, well-drained soils in full sun to part shade. Start seed indoors 6-8 weeks before last spring frost date. Set seedlings and/or purchased starter plants out after last frost date. In the alternative, sow seed directly in the garden after last frost date with several additional plantings thereafter at two week intervals. Day-neutral plants will bloom earlier. Do not allow soils to dry out. Plants appreciate good air circulation. Tall flowers may need staking or other support.