- You will get 501+ Seeds of Sweet William Mix Flower Seeds. - Seller Notes: “Dianthus barbatus. U.S. Grown seed. Tested 1/23-Germination 93%. Packed 1/23.”. - Planting Time: 8 Weeks. - Soil Type: Clay, Loam, Peat, Sand. - Life Cycle: Perennial. - USDA Hardiness Zone (°F): 7 (0 to 10 °F). - Soil pH: Neutral. - Watering: Medium. - Sunlight: Partial Shade, Full Sun. - Sweet William Mix. Several shades of pink's, whites, red's. These are cousins to carnations. Heirloom wildflower. Easy to grow. Not real picky about soil. Needs at least 4 hours of full sun a day. Does great in the garden, a border or in containers. Sweet Williams are pretty much carefree after established. Drought tolerant. Full sun or Part sun. Blooms spring into early fall. 500+Quality seeds. Thank you!. - Dianthus barbatus. - Perennial. - Full sun / P. shade. - Spring, soil temp 70F+. - SOW 1/16" deep, 3" apart. Keep moist. - Germination 14 - 21 days. - Medium water. Light fertilizer, if needed. - Flowers are pink's, whites, and red. Blooms from spring through early fall.