Mammoth Grey Stripe Sunflower

seeds

Helianthus annuus
(120 days) Open pollinated.

Annual. A traditional variety of giant (usually 6–12') single-stem sunflower with large seed heads. The one to grow if you want to eat the seeds or plant a maze. Beloved by both birds and kids. About 7 seeds/g. Especially attractive to pollinators.

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ships year-round

5518 Mammoth Grey Stripe

A: 1/2oz

$2.95

B: 2oz

$5.75

C: 8oz

$14.50

D: 16oz

$21.85

Quick Details

Hybrid Status: open pollinated
Days to Maturity: 120 days

Compare

Compare with other Sunflowers

Variety	Product Type	Hybrid Status	Days to Maturity
Autumn Beauty Mix Organic	seeds	open pollinated	70-90 days
Evening Sun Organic	seeds	open pollinated	60-80 days
Fantasia	seeds	F-1 hybrid
Florenza	seeds	open pollinated
Green Heart	seeds	F-1 hybrid
The Joker	seeds	F-1 hybrid	60 days
Lemon Queen	seeds	open pollinated
Lemon Queen Organic	seeds	open pollinated
Mammoth Grey Stripe	seeds	open pollinated	120 days
ProCut Red	seeds	F-1 hybrid	55 days
Moulin Rouge	seeds	F-1 hybrid	65 days
Ruby Eclipse	seeds	F-1 hybrid	55 days
Schnittgold	seeds	open pollinated
Selma Suns Mix Organic	seeds	open pollinated	63 days
Soraya	seeds	open pollinated	80 days
Summer Sensation	seeds	open pollinated	65 days
Vanilla Ice	seeds	open pollinated
Zohar Organic	seeds	F-1 hybrid	55-65 days
Sunflower Sampler	seeds
Hopi Black Dye Sunflower Organic	seeds	open pollinated	90-100 days

Shipping

From early May through October 31, items shipping from our garden seeds warehouse ship twice a week, usually Tuesday and Thursday. For quickest turnaround time order online by noon Monday or Wednesday.

Additional Information

Sunflower

Annual. Sunflower remains have been found in the Tabasco region of Mexico dating back more than 6000 years. Prized for their seeds by humans and birds, and for cutflowers by market growers, sunflowers also add a lighthearted touch to gardens. Sales soared in the spring of 2020. As our facilitator Ann says, “In hard times sunflowers make people happy.”

Culture: Easy to grow. Start indoors 3–4 weeks before last frost at temperatures of 65–75° or direct sow after frost, 3 to a pocket. Thin to best plant, 1' or more apart. Rich friable soil yields tallest plants; drought stunts growth. Will readily self-sow; for some fun leave a few volunteers in strategic locations.

Pollen or pollen-free? Although flower arrangers often eschew sunnies with pollen, Eliza Lindsay of Portland, Ore., speaks for our pollinators: “Sunflowers that produce pollen are my favorite. They feed the bees first and later the birds.” She says to grow sunflowers for cutting and to feed your pollinators, too, you must allow some of the flowers to remain uncut to complete their life cycle. Branching varieties are tops for this purpose since taking cuts encourages branching.

She offers tips for handling harvest and post-harvest for varieties with pollen. “The trick to sell them is to harvest prior to pollination. Once pollinated, flowers begin to senesce. Harvest when the petals are fully colored, clearly visible, but unexpanded and wrapped around the flower head. Harvest with long stems set in clean water in a cool dark place. Change water daily and recut stems as necessary. They will fully open in a few days, produce pollen in the vase, but have a long vase life.”

All varieties have pollen unless noted otherwise.

Germination Testing

For the latest results of our germination tests, please see the germination page.

Our Seeds are Non-GMO

All of our seeds are non-GMO, and free of neonicotinoids and fungicides. Fedco is one of the original companies to sign the Safe Seed Pledge.