Mammoth Grey Stripe Sunflower Seeds

  • Mammoth Grey Stripe Sunflower flower seeds for giant, towering plants and large, bird-friendly edible seeds.
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Mammoth Grey Stripe Sunflower Seeds

Mammoth Grey Stripe Sunflower Seeds

$4.45 USD
$4.45 USD
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Packet Size: 205 Seeds

Mammoth Grey Stripe sunflowers deliver towering, iconic garden drama with massive 12-inch golden blooms that rise on sturdy stalks reaching up to 9–12 feet tall. These fast-growing annuals are known for exceptional vigor, impressive resilience, and abundant seed production that attracts birds and pollinators throughout the season. Their large grey-striped seeds can be enjoyed roasted or left in the heads to support backyard wildlife well into fall.

We ship to the Continental U.S. and Alaska only. We cannot ship to Hawaii, overseas U.S. military bases, or U.S. territories.

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Growing Information

Planting

  • Plant Mammoth Grey Stripe sunflower seeds directly outdoors after frost when soil temperatures are consistently warm.
  • Choose a site with full sun exposure to ensure rapid, vigorous growth and large 12-inch flower heads.
  • Space seeds 12–18 inches apart to allow the plants’ broad foliage and tall stalks ample room to develop.
  • Expect germination within 7–10 days and a growing period of 90–110 days to maturity.
  • Provide loose, well-drained soil so the roots can anchor the tall plants securely as they reach mature height.

Maintenance

  • Support may be needed for plants grown in windy areas due to their mature height of 9–12 feet.
  • Water deeply but infrequently to encourage strong root development and sturdy stalks.
  • Remove spent blooms only if you do not wish for birds to forage on developing seeds.
  • Mulch around the base to help conserve moisture and limit weed competition.