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Description
planting mammoth sunflower seeds Sunflower Mammoth – Pittsboro FeedThis 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"
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.
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