- You will get 50+ Seeds of Black Eyed Susan Vine Flower Seeds. - Seller Notes: ?Thunbergia alata. U.S. Grown seed. Tested 1/23-Germination-93%.Packed 1/23.?. - Planting Time: 12 Weeks. - Soil Type: Clay, Loam, Peat, Sand. - Life Cycle: Annual. - USDA Hardiness Zone (F): 10 (30 to 40 F). - Soil pH: Neutral. - Watering: Medium. - Sunlight: Partial Shade, Full Sun. - Black Eyed Susan Vine. A really nice vine with dark green 2" leaves and 1 1/2" yellow flowers with a black center resembling a Black-Eyed Susan. Easy to grow and will tolerate some shade. Needs something to climb at least 8ft. Poles, Trellis, fences even does well on twine. Needs at least 6 hrs. of sun. Does great in containers or flower beds. Blooms all summer into fall, goes strong until first frost. Reseeds if left alone after growing season. 50+ Quality seeds per order. Thank You!. - Thunbergia alata. - Annual. - Full Sun / P. sun. - Spring, soil temp 75F+. - SOW 1/8" deep, 3" apart. Keep moist. - Germinates in 14 - 28 days. - Medium water. Light fertilizer in early summer if needed. - Flowers are orange. Blooms from mid-summer through fall.