Flower: Mammoth Sunflower Seeds

★★★★★ 4.7 90 reviews

US$1.60
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US$1.60
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Free shipping Free 30-day returns

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Management number 250588452 Release Date 2026/09/17 List Price US$1.60 Model Number 250588452
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Contents: Approximately 70 seeds, 7 g.  
Days to Maturity:
 71 days

Stalks average 9 ft. tall and may reach a height of 10 ft. or more. Heads average 11 in. across, with some reaching 14 in. or more when plants are well grown. Gray and black seeds. Space 18 in. apart. How to grow: Annual. Germination: 14 days, 70 degrees F. Full sun. Direct sow in May or June. Space 12-18” apart. Taller varieties may need staking. Early in the growth stage, place a pole at the base of the stalk. As the stem grows, use twine or soft ties to secure it to the stake every 6’ or so. History: Some archaeologists believe that Native Americans may have cultivated sunflowers as early as 3000 B.C. Uses: You can leave any remaining seed-heads in the garden for fall and winter visitors. Or you can cut and dry the seed-heads indoors. Throughout the winter months, tie dried heads to trees or to your deck to create feeding stations. Uses: You can leave any remaining seed-heads in the garden for fall and winter visitors. Or you can cut and dry the seed-heads indoors. Throughout the winter months, tie dried heads to fences or to your deck or suspend in trees to feed birds.

Southern Exposure focuses on offering heirloom varieties that are particularly well suited to growing in the Southeast. They work with a number of small farms in order to provide only Certified Organic and Non-GMO seeds.


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4.7 out of 5
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90 ratings | 37 reviews
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