- You will get 20+ Seeds of Moonflower Flower Seeds. - Seller Notes “Ipomoea alba. U.S. Grown seed. Tested 1/23-Germination 94%. Packed 1/23.”. - Planting Time: 10 Weeks. - Soil Type: Poor soils, Chalk, Clay, Loam, Peat, Saline, Sand, Silt. - Life Cycle: Annual. - USDA Hardiness Zone (°F): 10 (30 to 40 °F). - Soil pH: Neutral. - Watering: Medium. - Sunlight: Partial Shade, Full Sun. - Moonflower Morning Glory. Easy to grow vine. Big 4" white flowers with a yellow center. Every flower is little different than the one next it. The flowers open at evening and close mid-morning. The vines can go 12 feet+. There not picky at all about the soil or what they have to climb. They also work as a ground cover on hillsides. They are a Annual that will reseed themselves. Pretty much a carefree plant. They will go strong until the first frost. They don't like a lot of fertilizer, just steady light water about 2 times a week if no rain. Also does well in a med/large container. 20+ seeds per order. Thank you!. - Ipomoea alba moonflower. - Full sun / P. sun. - Spring, soil temp 70F+. - SOW 1/2" deep, 4"apart. Keep moist. - Germ 7-14 Days. - They need something to climb at least 6'. Fence, Trellis, Twine. - Medium water. - Flowers are white. Blooms from Mid-summer through late fall.