Sunflower, RostovHelianthus annuus $2.99 SKU: 0310A P100 OrganicAnnual flowers with edible seedsPlants grow to 6 feet tallFlower heads grow to 12 inches across70 days Select options Back $2.99 SizePacket 100 seeds Quantity -+Please select options before adding to cart Add to Cart Item Details (H. annuus) Classic Russian sunflower. Heads grow up to 12" in diameter on sturdy 6' stalks. Very good variety for edible seed production. Annual, 70 days. Learn to Grow it Direct Seed: 6" ApartDirect Seed: 1/2" DeepGermination: 10-14 DaysRows Apart: 24-36"