Mammoth Sunflower Seeds, Giant Heirloom Open Pollinated

ships from Newton, Kansas. ✅ Germination Promise: if your seeds fail to germinate under proper growing conditions, contact us within one year and we will replace them or refund your purchase. See the details . The original giant sunflower. Mammoth grows 9 to 12 feet tall on a single thick stalk, crowned with one enormous golden-yellow flower head that can reach 12 inches or more across. Bees and pollinators swarm it all summer, and the plump gray-striped seeds are prized for roasting, bird feeding, or saving for next year. Type: Annual ( Helianthus annuus ) Height: 9 to 12 ft Bloom: Single large head, up to 12 in diameter Color: Golden yellow Days to bloom: 80 to 90 days Sun: Full sun Seed count: choose 20 seeds or 50 seeds per packet Direct sow after last frost, 1 inch deep, 18 to 24 inches apart. Stake tall stalks in windy Kansas gardens. Open-pollinated, save your own seed for next season. 🌻 See our Kansas growing guide → Growing Guide: How to Grow Sunflowers in Kansas: A Zone 6b Guide - planting dates, spacing, watering, and harvest tips for Zone 6b.