Sowing: Direct sow in late spring, planting 1/4"" below the surface of the soil and compacting it slightly. Keep the soil evenly moist and at a temperature of 70-75 degrees F until germination, which widely varies from 20-70 days. Since these plants do not transplant well, they should be planted in peat pots if started indoors. USDA Zones: 2, 3, 4, 5, 6, 7, 8, 9, 10 Growing: Water the seedlings until they become established. Mature plants tolerate drought well, though watering in especially dry periods will improve the blooming. Excess moisture may result in root rot and other disease. Deadheading or cutting back the plant will also increase the blooms. This is a rather short-lived perennial that does not readily self-sow. This plant attracts butterflies and resists deer. Harvesting: For fresh flowers, cut long stems of flowers that have just opened and place them in water immediately; strip the leaves that will fall below the water.