Mammoth Grey Stripe Sunflower Seed

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A giant in the garden! One of the best cut flowers ever, this sunflower has blooms that are a full 12” across, and a single stalk can reach 12’ in height! ‘Mammoth Grey Stripe’ is not particular about its soil and is even drought-tolerant. Grow in a closely-spaced row for a privacy screen, and sow monthly for a continuous show. Attracts a wide variety of pollinating creatures. Bird’s favorite fall food since its introduction in 1880.

  • Type: Annual
  • Days to germinate: 10-15
  • Days to maturity: 100
  • Sun/shade: Full sun
  • Start indoors: Not recommended
  • Direct-sow outdoors: 1-2 weeks after last frost
  • Planting depth: 1/4” to 1/2” deep
  • Spacing: 3 seeds every 24”; when plants reach 2”, thin to one plant every 24”
  • Mature plant height: Up to 60”
  • Suitable for container growing: No
  • Year of discovery: 1880

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