Sunflower Seeds - Mammoth Grey-Stripe Helianthus annuus
- Annual; Grows 9-12 feet tall
- Giant flowers can reach 10-13 inches in diameter
- Prefers full sun exposure
Shipping Schedule
Seeds are shipped year-round, while perennials & bulbs are shipped seasonally. Pre-ordered bulbs ship at the proper planting time for your zone. Spring pre-orders are placed any time before March 1. Fall pre-orders are placed any time before September 1. These items will not ship immediately, but will be delivered at the ideal time for planting. Orders containing both seeds and bulbs may be split into multiple shipments. Click here for more shipping information.
| Pre-Ordered Spring Bulbs & Perennials | Shipping Begins |
|---|---|
| Zones 9 - 12 | Late February to Early March |
| Zone 8 | Early to Mid March |
| Zone 7 | Mid to Late March |
| Zone 6 | Early April |
| Zone 5 | Late April |
| Zones 2 - 4 | Late April to Early Mayl |
| In-season orders ship immediately at the time of purchase to all zones until inventory is depleted. | |
| Saffron Crocus & Bearded Iris | Shipping Begins |
| All Zones | Late August |
| Pre-Ordered Fall Bulbs | Shipping Begins |
| Zones 2 - 4 | Mid September |
| Zone 5 | Mid to Late Septemberl |
| Zone 6 | Late September |
| Zone 7 | Late September to Early October |
| Zones 8 - 12 | Early to Mid October |
| In-season orders ship immediately at the time of purchase to all zones until inventory is depleted. | |
| Pre-Ordered Fall Perennials* | Shipping Begins |
| All Zones | Mid October |
| *Amaryllis Bulbs, Hosta Roots, Lily Bulbs, Papaver Roots, Paperwhite Bulbs, Peony Roots & Siberian Iris Roots | |
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!!
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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 Color: Yellow 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
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Seed Coverage
Amount Recommended Coverage Packet Up to 10 Sq. Ft Ounce Package Up to 30 Sq. Ft 1/4 Pound Package Up to 125 Sq. Ft 1 Pound Sack Up to 500 Sq. Ft 5 Pound Sack Up to 2,500 Sq. Ft
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Product Reviews
Review
Mammoth is right!
Our sunflower was 12 feet tall. It was a huge tree! Beautiful! I’d post a pic if I could!
Review
MAMMOTH GREY STRIPE ARE AWESOME!
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
Very pleased!
we ordered a one ob package of sunflower seeds for wedding favor packets and were very pleased!!
Review
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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Sunflower Seeds - Mammoth Grey-Stripe Helianthus annuus
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