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Direct sow Sweet William seed after the last spring frost, planting it just below the surface and compacting the soil slightly. To start the Dianthus Barbatus 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 Sweet William 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 seedlin