Mammoth Grey Stripe Sunflower

Type: Heirloom
Packet Size: 10 seeds

Helianthus annuus. Mammoth Grey Stripe Sunflower is a classic heirloom variety known for its towering height, enormous golden-yellow flower heads, and large, striped edible seeds. These impressive sunflowers can grow 8–12 feet tall, creating a stunning display in gardens, along fences, and as natural privacy screens. A favorite among gardeners, Mammoth Grey Stripe produces large seed heads that are excellent for roasting, saving seeds, and feeding wild birds. Its bright yellow blooms attract bees, butterflies, and other beneficial pollinators, making it a wonderful addition to vegetable gardens, flower beds, and wildlife-friendly landscapes.

🌱 Growing Information

How to Grow Mammoth Grey Stripe Sunflower from Seed

Planting Depth: 1 inch
Seed Spacing: 12–18 inches
Row Spacing: 24–36 inches
Germination Time: 7–10 days
Days to Bloom: 80–90 days
Sun Requirements: Full Sun

Planting Tips:
Mammoth Grey Stripe Sunflowers grow best in full sun and fertile, well-drained soil. Sow seeds directly outdoors after the danger of frost has passed and soil temperatures have warmed. Plant in a location protected from strong winds, as these giant sunflowers can reach impressive heights and develop heavy flower heads. Water regularly during early growth and flowering. Allow seed heads to mature on the plants, then harvest when the backs turn yellow to brown and the seeds are fully developed. Dry harvested seeds thoroughly before storing or roasting.