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Sunflower, Russian Mammoth
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Helianthus annuus

Our tallest sunflower, this heirloom variety was first offered in the 1880s and is still prized for its gigantic flowers and abundant, nutritious seed. As they mature, the heavily laden seed heads bend forward like a giant outdoor shower. Allow to dry on the stalk to harvest seeds.

Calendar Days to Harvest: 105

ITEM # ORDER PRICE QUANTITY
01332 Pack, Sunflower, Russian Mammoth
25 seeds $ 3.49
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  • Heirloom
  • Size: 9 -12 feet tall, 10 -24 inch flowers
  • Hardiness: Tender Annual
  • Easy to Grow: Yes
  • Sun: Full/Partial
  • Water: Moderate
  • Seed Planting Depth: 1.00"
  • Days to Germination: 10-14 days
  • Plant spacing within a row: 18"-24"
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Start From Seed: Detailed instructions for direct seeding, or starting seeds indoors and transplanting.
Growing Conditions: Growing seasons, soil types, water and fertility requirements.
Pest Prevention: Organic solutions to common problems.
Harvest: Is it ready yet? When to harvest and how to store your garden produce.
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