Mammoth Gray Stripe Sunflower Seeds – Tall Giant Blooming Garden Variety

Mammoth Gray Stripe Sunflower Seeds produce towering plants that reach up to 10 feet tall, topped with huge golden-yellow blooms and a large central head filled with striped seeds. These classic sunflowers are perfect for home gardens, backdrops, and pollinator habitats.

Their bright, cheerful flowers attract bees and butterflies, while the mature seeds provide a natural food source for birds. Easy to grow and heat-tolerant, Mammoth Sunflowers are a favorite among gardeners, kids, and wildlife enthusiasts alike.

Features

• Premium quality non-GMO Mammoth Gray Stripe Sunflower seeds
• Produces giant, bright yellow blooms with striped seed heads
• Excellent for garden backdrops and pollinator habitats
• Attracts bees, butterflies, and birds
• Drought and heat-tolerant once established
• Easy to grow and low-maintenance

Specifications

• Common Name (US): Sunflower (Helianthus annuus)
• Variety: Mammoth Gray Stripe
• Seed Type: Annual flowering plant, open-pollinated, non-GMO
• Planting Season: Spring after the last frost
• USDA Hardiness Zones: 2–11 (annual everywhere)
• Sunlight Requirements: Full sun (6–8 hours daily)
• Soil Type: Well-drained, moderately rich soil; pH 6.0–7.5
• Sowing Method: Direct sow 1 inch deep; thin after germination
• Germination Time: 7–10 days at 70–75°F
• Days to Maturity: 90–110 days from sowing
• Spacing: 18–24 inches apart
• Plant Height: 8–12 feet tall
• Watering Needs: Moderate; prefers consistent moisture
• Bloom Season: Summer through early fall
• Yield: Large blooms (10–12 inches wide) and striped edible seeds
• Storage: Seeds remain viable for 1–2 years if kept cool and dry