Sunflower Mammoth Seed

Sunflower Mammoth Seed
Sunflower Mammoth Seed
Sunflower Mammoth Seed
Sunflower Mammoth Seed

Sunflower Mammoth Seed

form: RAW
size: 50 seeds
These plants are 8' and more in height when well grown and make an effective screen or background. The impressive flower heads have brown centers surrounded by yellow petals and are often 12" across. When dry, the seed heads can be cut and sold as is for wild bird food. Or spread them out under cover until seeds loosen and shatter out of the head, then package them as snack food and for baking.

Color: Brown centers surrounded by yellow petals

Growing Tips

To ensure your Mammoth Sunflower seeds grow to be tall plants, remove weeds with the help of a natural mulch. Using mulch also helps retain soil moisture and heat. Use shredded leaves as an organic mulch for your Giant Mammoth Sunflower seeds to improve soil quality. Always keep mulch away from the flowers' stems to prevent possible deterioration.

To harvest your Mammoth Sunflower seeds for sale or eating, cut the head off after the stalk dries but before fall or winter rain arrives. The flower is ready for harvest when the florets in the center wilt and the back of the flower head is turning yellow or starting to droop.

Buy more, save more! All eligible quantity discounts will be automatically applied in your Cart.

SizeQuantityPrice Each
RAW / 10,000 seeds / UNTREATED2+$34.68

We offer free standard shipping on orders above $250!

For orders below $250, shipping and handling charges will include outbound freight and packaging materials. Charges apply to all orders, and are based on the total order value before tax. Expedited services are also available at Checkout, and additional charges apply.

We are currently processing and shipping most orders within 1-3 business days of receipt (backorders not included), via USPS or UPS. Due to high demand during the peak months of January to May, orders may require additional time for packaging /shipment. Live plants are only shipped at certain times of the year and may be delayed due to poor weather conditions. Plugs & liners ship directly from our plug & liner grower specialists.

We do not ship on Saturday or Sunday. Orders placed Saturday to Sunday are considered received on Monday. We also do not ship during company-recognized holidays.

Currently, Harris Seeds only ships within the continental United States.

See our full shipping policy

  • Soil temperature: 70-75°F
  • Germination Lighting: Cover Seed
  • Germination Days: 4-8 Days
  • Grow on temperature day: 55-60°F
  • Plant spread: 30-36"
  • Plant height: 8-10"
  • Plant type: Annual
  • Seeding depth: 0.75-1.0"
  • Maturation days: 75 Days
  • Planting method: Direct Sow