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Sunflower Mammoth
Sunflower Mammoth

Description

This giant among sunflowers is a fast grower whose single stalk can reach 12' tall and produces one 10"-12" flower! Not fussy about soil, it's very easy to grow and drought tolerant. Grow in a tight row to make an attractive screen. Sow monthly for continual bloom.

Variety Info

  • Family: Asteraceae
  • Type: Sunflower
  • Native: North America
  • Hardiness: Annual
  • Exposure: Full sun
  • Bloom Period: Summer to frost
  • Plant Dimensions: 6'–12' tall
  • Variety Info: Up to 12"-wide flowers with yellow petals and a brown center. Single type.
  • Attributes: Attracts Pollinators, Cut Flower, Drought Tolerant, Heat Tolerant, Edible Flower

Sowing Info

  • When to Sow Outside: RECOMMENDED. 1 to 2 weeks after your average last frost date.
  • When to Start Inside: 2 to 4 weeks before your average last frost date. Sunflowers are senstive to root disturbance; sow in biodegradable pots that can be planted directly in the ground.
  • Days to Emerge: 10–15 days
  • Seed Depth: ¼"–½"
  • Seed Spacing: A group of 3 seeds every 24"
  • Thinning: When 3" tall, thin to 1 every 24"

Growing Info

  • Harvesting: Seeds are ready to harvest when the back of the head has dried and turned brown, about 4 weeks after the flowers have been pollinated. Petals will have wilted and fallen off, and the seeds will be plump, and colored white with gray/black stripes. Seeds ripen around the outside of the flower first; the ones in the center will ripen last. Average yield is approximately 1 pound per head.

Sunflower Mammoth

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Description

This giant among sunflowers is a fast grower whose single stalk can reach 12' tall and produces one 10"-12" flower! Not fussy about soil, it's very easy to grow and drought tolerant. Grow in a tight row to make an attractive screen. Sow monthly for continual bloom.

Variety Info

  • Family: Asteraceae
  • Type: Sunflower
  • Native: North America
  • Hardiness: Annual
  • Exposure: Full sun
  • Bloom Period: Summer to frost
  • Plant Dimensions: 6'–12' tall
  • Variety Info: Up to 12"-wide flowers with yellow petals and a brown center. Single type.
  • Attributes: Attracts Pollinators, Cut Flower, Drought Tolerant, Heat Tolerant, Edible Flower

Sowing Info

  • When to Sow Outside: RECOMMENDED. 1 to 2 weeks after your average last frost date.
  • When to Start Inside: 2 to 4 weeks before your average last frost date. Sunflowers are senstive to root disturbance; sow in biodegradable pots that can be planted directly in the ground.
  • Days to Emerge: 10–15 days
  • Seed Depth: ¼"–½"
  • Seed Spacing: A group of 3 seeds every 24"
  • Thinning: When 3" tall, thin to 1 every 24"

Growing Info

  • Harvesting: Seeds are ready to harvest when the back of the head has dried and turned brown, about 4 weeks after the flowers have been pollinated. Petals will have wilted and fallen off, and the seeds will be plump, and colored white with gray/black stripes. Seeds ripen around the outside of the flower first; the ones in the center will ripen last. Average yield is approximately 1 pound per head.