The tallest sunflower variety, American Giant can grow to up to 16 ft. tall, with stronger stalks than other tall types, and enormous leaves. Plants are topped by 10 in. golden-yellow sunflowers. American Giant makes an excellent background plant or tall screen. To produce the tallest plants and largest flower heads, plant in fertile soil and provide plenty of sun and water.
Growing American Giant Hybrid Sunflower Seeds
Plant Sunflower Seeds: Direct sow into prepared seed beds after all danger of frost. Plant seeds 6 in. apart, ½ in. deep. Thin to 1-1½ ft. apart. Can start plants early indoors in 2 in. pots or cell packs. Transplant into the garden well before seedlings become root bound.
Grow Sunflowers: Sunflowers require full sun. Soil which is moist and moderately fertile will produce the best flower heads. Blooms attract bees, birds and butterflies.
U.S. Shipping Rates
Free shipping on U.S. orders over $45.00.
Free priority shipping on U.S. orders over $125.00.
Standard U.S. shipping is $5.95.
Priority U.S. shipping is $9.95.
International Shipping Rates
Shipping to Canada is $9.95.
International shipping to all other countries is $14.95.
We guarantee all the seeds we sell for one full year from the date of purchase. If you are unsatisfied with any seeds purchased from Swallowtail Garden Seeds, we will issue a refund. For customers in the U.S., we can send one-time replacement packets or issue a refund.