- You will get 101+ Seeds of Downy Sunflower Flower Seeds. - Seller Notes: “Helianthus mollis. U.S. Grown seed. Tested 1/23-Germination 94%. Packed 1/23.”. - Soil Type: Clay, Loam, Peat, Sand. - Life Cycle: Perennial. - USDA Hardiness Zone (°F): 11 (40 to 50 °F). - Soil pH: Neutral. - Watering: Medium. - Sunlight: Partial Shade, Full Sun. - Downy Sunflower. Aka, Hairy or Ashy sunflower. American native wildflower from the plains. Easy to grow from seed. Drought tolerant. These get 3 ft to 5 ft tall. Fine hairs cover the stems and leaves, giving this native wildflower a gray-green color. A classic sunflower that blooms from summer thru fall. Thrives in poor, dry soils with gravel, rock or clay where it will form a dense colony. Birds and squirrels love the seeds. Very easy to grow. 100+ Seeds per order. Thank You!. - Some American Native Wildflower seeds need to go through a cold winter to germinate. This plant is one of them. They do this so the seed won’t sprout in fall, only to have the seedling not make it through a cold winter. I have stratified these seeds to simulate a cold winter(stratification) This raises the germination rate considerably. Thanks for looking!!. - Helianthus mollis. - Perennial. - Full sun. - Spring, soil temp 70F+. - Sow 3 seeds per plant, press into soil 1"deep, about 24" apart. Keep moist. - Germination 7-14 days. - Medium / Light water. Light organic fertilizer if needed. - Flowers are Yellow. Blooms late summer through fall.