Sunflower Seeds - Mammoth Grey Stripe
Giant heirloom sunflower towering up to 12 feet with huge seed-filled heads perfect for birds or roasting.
Description
The giant sunflower of classic Americana. ‘Mammoth Grey Stripe’ towers 8–12 feet tall, producing enormous, golden blooms with broad grey-striped seed heads that can reach up to a foot across. The seeds are plump, flavorful, and perfect for roasting or feeding wildlife.
Plants are hardy and drought-tolerant, thriving in full sun and rich soil. Excellent for children’s gardens, privacy screens, or backyard seed harvests.
An heirloom known since the 1880s, this variety embodies the grandeur of the old homestead garden—tall, strong, and abundantly generous.
Your payment is processed securely via trusted gateways. We do not store credit card details and we do not have access to your card information.
Pickup currently unavailable at Bertie County Seeds
Plant identity
Timing and climate
Site, soil, and space
Sunflower-specific planning
Check mature height, wind exposure, shade, and intended use
Sunflower height and placement systemSunflowers range from compact container plants to giant living screens. Mature height is the first decision because it changes staking, wind exposure, spacing, and the shade cast on nearby crops.
Variety planning profile
- Mature height
- 97–120 in
- Plant spacing
- 12+ in
Sunflower placement checker
Place tall varieties where they will not shade shorter sun-loving crops. Local wind, soil depth, watering, and flower-head weight can change whether staking is necessary.
Shipped from U.S.A.
Our seeds are grown and sourced from the US. They're then packed and shipped from Colerain NC.
Triple tested
We regularly test the quality and germination rate of our seeds. We're so confident that our seeds are backed by a 1 year warranty!
Use a current laboratory soil test
Soil-test interpreter
Compare your report with this product's listed pH target: 6.0–6.5.
This tool interprets values you enter; it does not replace laboratory or Cooperative Extension amendment rates. Soil test methods and nutrient recommendations vary by region.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Keep planning
Build the rest of your garden.
Compare related varieties, add practical supplies, or browse dependable value picks.
