Mammoth Sunflower Seeds – Heirloom Non-GMO Giant Variety for Roasting Seeds, Bird Feed & Dramatic Garden Displays

Grow towering, show-stopping blooms with Mammoth Sunflower Seeds, a classic heirloom non-GMO variety that combines ornamental beauty with practical harvest value. These single-stem giants reach 10–12 feet tall, producing massive golden-yellow flower heads up to 12 inches wide—a true centerpiece in any garden.

Beautiful and Productive Giants:

• Grows 10–12 ft tall with strong, sturdy stalks.
• Produces large flower heads packed with hundreds of oil-rich, edible seeds.
• Ideal for roasting, snacking, bird feed, or seed saving for next season.
• Excellent for pollinator support, wildlife feeding, or use as a natural privacy screen.

Why Gardeners Love Mammoth Sunflowers:

• Classic Giant Variety – A traditional favorite for its height, size, and yield.
• High-Yield Seed Harvest – Produces plump, nutritious seeds for humans and wildlife alike.
• Bold Garden Focal Point – Bright golden blooms command attention in borders or homestead gardens.
• Easy & Reliable Growth – Thrives in full sun and well-drained soil across USDA Zones 3–11.
• Drought Tolerant – Strong, deep roots make it a resilient choice for summer heat.

How to Grow Mammoth Sunflowers:

• When to Plant: Sow seeds directly outdoors after the last frost when soil has warmed to 60°F (16°C) or higher.
• Soil & Sun: Prefers well-drained soil and full sun; amend with compost for best growth.
• Spacing: Allow 18–24 inches between plants to give stalks room to grow tall and strong.
• Watering: Water deeply once or twice a week to promote deep root systems.
• Bloom & Harvest: Expect blooms mid-summer, with seed heads maturing late summer through early fall.

Harvest & Use:
After petals fade, let heads dry naturally on the stalk until seeds loosen easily. Harvest and roast seeds for snacking, save for next year’s planting, or leave them out for birds and pollinators to enjoy. With its towering presence and generous yield, Mammoth Sunflower is a must-have for gardeners seeking both impact and sustainability.

Net Wt. 5G