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
Availability & Turnaround Time
All seeds are shipped year-round, while flower bulbs are shipped on a seasonal basis. Typical turnaround times for in-stock items is between 2 – 5 business days.
| Category | Shipping Period |
|---|---|
| All Seeds: | |
| Zones 2 – 10 | Year-Round |
| Spring Planted Bulbs & Perennials (March - June): | |
| Zones 8 – 10 Pre-Orders | Mid March |
| Zones 7 Pre-Orders | Late March-Early April |
| Zones 6 Pre-Orders | Early-Mid April |
| Zones 5 Pre-Orders | Mid-Late April |
| Zones 2 – 4 Pre-Orders | Late April-Early May |
| All Zones Ship Until Inventory is Sold Out | May - June |
| Saffron Crocus & Bearded Iris (Late August - November): | |
| All Zones | Start Shipping late August |
| Fall Planted Bulbs & Perennials (September - January): | |
| Zones 2-4 Pre-Orders | Mid September |
| Zones 5 Pre-Orders | Mid-Late September |
| Zones 6 Pre-Orders | Late September |
| Zones 7 Pre-Orders | Late September - Early October |
| Zones 8-10 Pre-Orders | Early October |
| All Zones Ship Until Inventory is Sold Out | Mid October - January |
| Fall Perennial Roots/Bulbs* & Amaryllis Bulbs (October - January) | |
*Fall Perennial Roots/Bulbs include: Hosta Roots, Siberian Iris Roots, Lily Bulbs, Papaver Roots and Peony Roots.
We try our utmost to maintain reliable inventory of all products, and are very proud of our record in doing so. However, as we are a company engaged in what Mother Nature provides, we do sometimes experience shortages and crop failures beyond our control. If, for any reason, we are required to backorder any portion of your order, rest assured we will keep you apprised of updated shipping information and/or any other options that may satisfy your needs and wishes.
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 - Mammoth Grey Stripe Botanical Name: Helianthus annuus Life Cycle: Annual Color: Yellow Bloom Season: Summer/Fall Height: 9-12 Feet, Flower Heads up to 13 Inches Diameter Light Requirement: Sun Sowing Method: Direct Sow Seeds per Pound: Approx 4,500 Hardiness Zones: All Ships: Year Around -
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!!
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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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