Sunflower Seeds Russian Mammoth

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Who doesn’t love the huge, grand statement that Sunflowers bring to the late season garden? Organic Russian Mammoth grows to be up to 14’ feet, towering over much of the garden and delighting with huge, classic yellow blooms that can grow to be 12-14” across. This giant beauty makes for a spectacular growing screen or background for any garden or meadow. Like all Sunflowers, Russian Mammoth is native, easy to grow and its large seeds will attract a variety of pollinators to the garden. All of the seed we handle at American Meadows is non-GMO, neonicotinoid-free and guaranteed to grow. Certified organic. Annual.
Zones 1 - 10
Bee Friendly
Attract Butterflies
Attract Hummingbirds
Deer Resistant
Great For Mass Plantings
Easy To Grow
Low Maintenance
Good For Cut Flowers
Light Requirements
Full Sun
Half Sun / Half Shade
Mature Height 144-180" tall (12-15 feet)
Bloom TimeSummer

USDA Hardiness Planting Zones

To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.

  • If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
  • If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).

Find Your Planting Zone:


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Plant Information
Organic Certification "Russian Mammoth" is one of the true garden giants, growing up to 14 ft. But the flowers, which range from 12 to 14" across are still lovely, with lush golden petals and centers that are not so filled with seeds that they topple over. This one is a giant beauty, and makes a spectacular, fast-growing screen or background for your garden.
More Information
Associated SKUsAM015946
AM013346 (1 Pound) - Out of stock.
AM013347 (10 Pounds) - Out of stock.
AM013348 (5 Pounds) - Out of stock.
AM013349 (1/4 Pound) - Out of stock.
Common Name
Sunflower Russian Mammoth
Botanical Name
Helianthus annuus Russian Mammoth
Seed Life Cycle
Light Requirements
Full Sun, Half Sun / Half Shade
Bloom Time
Mature Height
144-180" tall (12-15 feet)
Wildflower Mix or Specie
Ships As
Ideal Region
Northeast, Southeast, Midwest, West, Southwest, Pacific Northwest
1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Neonicotinoid Free
Native To
North America
Soil Type
Loamy Soil, Sandy Soil, Clay Soil, Well-Drained Soil
Soil Moisture
Dry, Average, Moist / Wet
Bee Friendly, Attract Butterflies, Attract Hummingbirds, Deer Resistant, Native, Great For Mass Plantings, Easy To Grow, Low Maintenance, Good For Cut Flowers
Ships to Hawaii, Alaska & Canada
Planting & Care

No longer available this season.

As soon as your order is placed you will receive a confirmation email. You will receive a second email the day your order ships telling you how it has been sent. Depending upon your order date, we may hold your shipment to combine it with other products on your order, if applicable. See our shipping information page for approximate ship dates and more detailed information. If you have any questions, please call Customer Service toll-free at (877) 309-7333 or contact us by email.

Shipping Rates

Our shipping rates are calculated based on our actual average shipping costs. We do not seek to profit from shipping fees, so rest assured that our shipping rates reflect an average of what it costs to get our guaranteed products safely to your door.

US Shipping Charges

Merchandise Total Shipping
Up to $19.99$6.99
$20 to $34.99$8.99
$35 to $49.99$10.99
$50 to $74.99$12.99
$75 to $99.99$14.99
$100 and Over$16.99

Canadian Shipping Charges

Merchandise Shipping
Up to $24.99$14.95
$25 to $49.99$19.95
$50 to $74.99$24.95
$75 to $99.99$29.95
$100 and Over$39.95

If your order requires more than one shipment and all items are shipping to the same address, there is no additional shipping charge. If you have any questions, please call us at (877) 309-7333.

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