Bumbleseeds

Sunflower Mammoth (Helianthus annuus 'Mammoth') Open Pollinated Non GMO Organic - Flower

1 g
$3.50
Frais d'expédition calculés lors du passage à la caisse.
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Sunflower Mammoth (Helianthus annuus 'Mammoth') Open Pollinated Non GMO Organic - Flower


The Sunflower Mammoth, scientifically known as Helianthus annuus 'Mammoth,' is an impressive and iconic sunflower variety that lives up to its name. Known for its colossal size and radiant beauty, this sunflower variety stands tall and proud in gardens, attracting both gardeners and onlookers alike. With its large, golden-yellow blossoms and bold, robust stems, the Sunflower Mammoth not only adds a touch of sunlit brilliance but also serves as a valuable source of food for pollinators and birds.

Sunflower Mammoth is not only a beautiful addition to your garden but can also provide nutritious seeds for you and a valuable food source for birds. By following these growing instructions, you can cultivate these magnificent sunflowers and enjoy their vibrant presence.

Growing Instructions:

  • 1. **Choose the Right Location:** Sunflowers thrive in full sun. Select a sunny spot in your garden or yard with at least 6-8 hours of direct sunlight per day.

  • While soaking sunflower seeds before planting isn't strictly necessary, it can enhance germination rates. Soaking seeds for 4-12 hours in water can soften the seed coat, making it easier for the emerging sprout to break through. This process can potentially speed up germination and promote uniform growth.

    If you choose to soak sunflower seeds:
    1. **Use room temperature water:** Avoid hot or cold water; lukewarm water is suitable.
    2. **Limit soaking time:** 4-12 hours is generally sufficient; excessively long soaking may lead to waterlogged seeds.

    After soaking, plant the seeds in well-draining soil at the recommended depth. Keep the soil consistently moist until seedlings emerge. Monitoring environmental conditions, such as temperature and moisture, is crucial for successful germination.

  • 2. **Prepare the Soil:** Sunflowers are adaptable, but they prefer well-drained soil. Loosen the soil to a depth of about 2 feet and amend it with organic matter like compost for improved fertility.
  • 3. **Planting Seeds:** Plant sunflower seeds directly into the soil when all danger of frost has passed, typically in late spring. Sow the seeds about 1 inch deep and space them 6-12 inches apart, depending on the size of the mature sunflower.
  • 4. **Watering:** Keep the soil consistently moist, especially during the seedling stage. Sunflowers have deep roots, and consistent moisture is essential for robust growth. Once established, they become more drought-tolerant.
  • 5. **Support:** Mammoth sunflowers can grow very tall and might benefit from staking or support to prevent bending or falling over in windy conditions.
  • 6. **Fertilization:** Sunflowers typically do well without excessive fertilization. If your soil lacks nutrients, you can apply a balanced, all-purpose fertilizer sparingly at planting.
  • 7. **Thinning:** If you've sown multiple seeds in one spot, thin the seedlings to the desired spacing when they are a few inches tall.
  • 8. **Pest and Bird Protection:** Sunflowers are attractive to birds, particularly as they start to mature and form seeds. If you want to harvest seeds for yourself, consider using netting or other means to protect the ripening heads.
  • 9. **Harvesting Seeds:** Allow the sunflower heads to fully mature on the plant. You can harvest the seeds once the flower head has dried and the seeds are plump and firm. Simply cut the head and remove the seeds.
  • Seed count: 15