TomorrowSeeds - Mammoth Grey Stripe Sunflower Seeds - 50+ Count - For 2026 Planting Helianthus

Mammoth Grey Stripe Sunflower is a true giant among sunflowers, reaching heights of up to 12 feet and boasting enormous, golden-yellow blooms with dark centers that can span up to 14 inches across. This iconic sunflower variety is a favorite for its towering presence, classic beauty, and dual-purpose appeal. Its impressive size makes it a standout addition to any garden, creating a vibrant and cheerful focal point that also provides shade and visual interest. Mammoth Grey Stripe's seeds, marked by their distinctive grey and white stripes, are highly prized for their delicious flavor and nutritional value, making them perfect for snacking, baking, or feeding backyard birds. It’s an excellent choice for gardeners looking to attract pollinators, as its large blooms are a magnet for bees, butterflies, and other beneficial insects. Though this plant’s sturdy stems and hearty nature make it easy to grow in a variety of conditions, ensuring this sunflower's growth to towering giant requires loose soil to a depth of at least 2 feet to encourage deep root growth. Mammoth Grey Stripe Sunflower seeds are not only delicious but also easy to harvest, providing a fun and rewarding activity for gardeners of all ages.


Also Known As: Mammoth Sunflower, Gray Stripe Sunflower, Mammoth Grey Stripe, Grey Stripe Giant Sunflower, Giant Sunflower, Tall Sunflower, Mammoth Seed Sunflower, Jumbo Sunflower, American Giant Sunflower, Large Sunflower.

Plant Name: Sunflower, Mammoth Grey Stripe
Latin Name: Helianthus annuus
Days to Germinate: 7-14
Days to Bloom: 100-120
Plant Height: 8 - 12 Feet
Spread: 2 - 3 Feet
Bloom Diameter: 12 - 14 Inches
Growth Habit: Upright
USDA Zones: 2-11
Lifespan: Annual
Brand: TomorrowSeeds
Sunlight: Full Sun, Partial Shade
Pollination: Heirloom, Open-Pollinated
GMO: No
Fungicide-Treated Seeds*: No
Seeds Packed For**: 2026
*Fungicide-treated seeds protect the seedlings from diseases until they are up and growing. Do not eat treated seeds.
**Seeds are freshly packed for the growing season of the year listed. Seeds are still viable beyond pack date. Store in a cool and dry location such as the refrigerator or basement to best preserve germination rates.