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Russian Mammoth Sunflower
Helianthus annuus
Heirloom
9-12 ft. Tender Annual/Reseeding
This classic sunflower was first offered in the 1880's. Still widley prized for its gigantic flowers and abundant, nutritious seed.
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Planting Depth: 1"
Soil Temp. for Germ.: 60-70°F
Days to Germ.: 6-12
Plant Spacing: 1-2'
Days to Maturity: 110
Full Sun
Water Less, Drought Tolerant
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