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Talk about making a statement in the garden! Mammoth Grey Stripe has huge blooms, growing up to 12" across. Each bloom sits atop stems that grow to be 8-12 ft tall. Extremely fun to watch grow, Mammoth Grey Stripe is a great choice for scattering throughout the meadow, using as a background or privacy screen, or creating a child's first garden. Massive seed heads are good for harvesting and roasting or leaving in place to feed birds. An heirloom, open-pollinated Sunflower, Mammoth Grey Stripe is loved by a variety of bees, butterflies, and hummingbirds, too. All of the seed we carry at American Meadows is non-GMO, neonicotinoid-free and guaranteed to grow. Annual.
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).
With huge flowers (often 10 or 12" inches across) these garden giants are hybrids developed for seed production (Sunflower oil, bird seed, etc.) But we've had so many requests for them, we now have them available for meadow planting. Remember, these are the ones that grow from 8 to a whopping 12 ft. tall, so unless you're planting them alone, scatter them throughout your meadow, or use them as a background screen. Kids love watching them grow so fast and so tall, and of course, they're magnets for songbirds. Enjoy!
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 Charges
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 Charges
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.
![](https://www.pinterest.com/pin/create/button/?url=https://www.americanmeadows.com/wildflower-seeds/sunflower-seeds/sunflower-seeds-mammoth-grey-stripe&media=https://www.americanmeadows.com/media/catalog/product/s/u/sunflower-mammoth-gray-stripe-flower.jpg&description=Talk about making a statement in the garden! Mammoth Grey Stripe has huge blooms, growing up to 12" across. Each bloom sits atop stems that grow to be 8-12 ft tall. Extremely fun to watch grow, Mammoth Grey Stripe is a great choice for scattering throughout the meadow, using as a background or privacy screen, or creating a child's first garden. Massive seed heads are good for harvesting and roasting or leaving in place to feed birds. An heirloom, open-pollinated Sunflower, Mammoth Grey Stripe is loved by a variety of bees, butterflies, and hummingbirds, too. All of the seed we carry at American Meadows is non-GMO, neonicotinoid-free and guaranteed to grow. Annual.)
