Sunflower Seeds - Mammoth Grey-Stripe Heirloom Mammoth Grey-Stripe Sunflower Seeds -Helianthus annuus The most familiar and iconic of all the classic sunflowers, our Mammoth Grey Stripe Sunflower seeds may look like the kind you can eat, but we think you'll find them much more rewarding when planted in a sunny location. These beautiful flowers live up to their name and can grow up to a towering 12 feet high with 10+ inch blooms!! Annual; A crowd favorite! Delicious seeds Prefers full sun exposure FAST FACTS LIFE CYCLE: Annual LIGHT REQUIREMENT: Full Sun PLANTING SEASON: Spring COLOR: Yellow PLANT HEIGHT: Up to 144 inches (12 FEET TALL!) make sure you stake or tie to a fence. PLANT SPACING: 12-18 inches PLANTING DEPTH: 1/2 inch SOWING METHOD: Direct Sow WATER NEEDS: Average COLD STRATIFICATION: No HARDINESS ZONES: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 SHIPS: Year Round PLANT TYPE: Tall green stalks with large yellow blossoms and dark center. FEATURES: Open Pollinated, Cut Flower Garden, Easy to Grow Maintain, Edible, Attracts Pollinators, Deer Resistant, Dry Area Tolerant BLOOMS: Summer, Late Summer, Early Fall, Fall