Sowing: Direct sow Sweet William seed after the last spring frost, planting it just below the surface and compacting the soil slightly. To start the seed indoors 6-8 weeks before the last frost of spring, sow just below the surface of a flat; compress the soil slightly and keep it consistently moist. Keep the temperature at 60 degrees F until germination, which should take place within 14-20 days. Thin or transplant the seedlings.

Growing: This plant adapts well to dry or rocky soils. Water seedlings until they become established; mature plants are drought tolerant and will only need watering in exceptionally dry periods. This plant usually develops a rosette of leaves in its first season and a flowering stalk in the second summer, though it may bloom in the first year if started early enough. Deadhead the faded blossoms for prolonged blooming. After 2 years of growth, divide the plant for healthy growth. This plant readily reseeds itself, but volunteer seedlings can easily be removed if not wanted. This plant attracts bees and butterflies while resisting deer.