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Sunflower Seeds - Mammoth Grey-Stripe Helianthus annuus

Buy by the Packet or in Bulk

Unit Size Unit Price Savings Qty
Packet $2.95
1 Ounce Package $7.50
1/4 Pound Package $15.95 47%
1 Pound Sack $31.95 73% Notify Me
5 Pound Sack $121.95
80% Notify Me
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  • Annual; Grows 9-12 feet tall
  • Giant flowers can reach 10-13 inches in diameter
  • Prefers full sun exposure

Product Description

Heirloom Mammoth Grey-Stripe Sunflower Seeds -Helianthus annuus

The most familiar and iconic of all the classic sunflowers, our Mammoth Grey Stripe Sunflower seeds may look like the kind you can eat, but we think you'll find them much more rewarding when planted in a sunny location. These beautiful flowers live up to their name and can grow up to a towering 12 feet high with 10+ inch blooms!!

  • Fast Facts

    Name:Sunflower Seeds - Mammoth Grey-Stripe
    Botanical Name:Helianthus annuus
    Life Cycle:Annual
    Light Requirement:Full Sun
    Planting Season:Spring
    Plant Type:Tall green stalks with large yellow blossoms and dark center.
    Features:Open Pollinated, Cut Flower Garden, Easy to Grow & Maintain, Edible, Attracts Pollinators, Deer Resistant, Drought Tolerant
    Blooms:Summer, Late Summer, Early Fall, Fall
    Plant Height:Up to 144 inches
    Plant Spacing:12-18 inches
    Planting Depth:1/2 inch
    Sowing Method:Direct Sow
    Cold Stratification:No
    Seeds per Packet:3 g
    Hardiness Zones:1, 2, 3, 4, 5, 6, 7, 8, 9, 10
    Ships:Year Round
  • Planting Video

  • Seed Coverage

    AmountRecommended Coverage
    PacketUp to 10 Sq. Ft
    Ounce PackageUp to 30 Sq. Ft
    1/4 Pound PackageUp to 125 Sq. Ft
    1 Pound SackUp to 500 Sq. Ft
    5 Pound SackUp to 2,500 Sq. Ft

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Product Reviews

Global Rating: 5.00 from 4 reviews

Review By

Mammoth is right!

Our sunflower was 12 feet tall. It was a huge tree! Beautiful! I’d post a pic if I could!


Review By


I had never planted sunflowers before June 2017. They averaged a foot of growth per WEEK finally reaching a height of 6 feet ABOVE my 6-foot white fence! Strangers stopped by to take photos. The heads measured up to 18 inches across! After losing one stalk on a windy day we tied the rest to our fence with twine. This year I couldn't find Mammoth Grey so tried another kind. It's so slow growing I've decided to order Mammoth Grey and start over, even though it's mid-June. These were beyond my wildest dreams!


Review By

Very pleased!

we ordered a one ob package of sunflower seeds for wedding favor packets and were very pleased!!


Review By

Mammoth GreyStripe Seeds

I'm very pleased with my recent purchase of Mammoth Greystripe Sunflower Seeds. Customer service was great when I had to make a change on my order and the seeds arrived in a timely manner. The seeds themselves look beautiful and healthy and I'm very excited about getting them in the ground soon.

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