Organic black 'Mammoth' sunflower
Organic black 'Mammoth' sunflower (Helianthus annuus) from McKenzie Seeds, a spectacular and nutritious giant variety for the garden
The black 'Mammoth' sunflower is an impressive and iconic variety, renowned for its vigorous growth , giant flowers , and high ecological value. Easy to grow, it develops majestic, sturdy stems that can reach 2.5 to 3 meters in height , topped with bright yellow flowers up to 30 cm in diameter . These spectacular flower heads make a true focal point in the garden.
This variety is particularly prized for its abundant production of delicious and nutritious black seeds , enjoyed by both gardeners and birds. 'Mammoth' is also an excellent choice for pollinator-friendly gardens , providing a generous source of pollen and nectar for bees, butterflies, and other beneficial insects throughout its flowering period.
Hardy and undemanding, this sunflower tolerates heat, drought and poor soils well, making it an ideal plant for natural gardens, borders, backgrounds and educational projects with children.
Companion plants: Corn, Squash, Beans, Zinnias
Plant enemies: None notable
Spread/Carry: Straight stem, vertical carry
Plant height: 2.5 to 3 m
Flower diameter: Up to 30 cm
Seed producer: McKenzie
Seed type: Open pollination
Physical type of seed: Seeds
Quantity per packet: Approximately 30 to 35 seeds
Special features: Giant flowers, edible seeds, attracts pollinators and birds, very easy to grow
Flower color: Bright yellow with a brown center
Texture/Use: Rich and flavorful seeds
Tolerance: Drought, heat, poor soils, deer
Farming method
Sunflowers do not transplant well and must be sown directly in the ground once all risk of frost has passed and the soil has warmed up. Choose a location in full sun (level 3) receiving at least 6 hours of sunlight per day.
Sow the seeds 1.3 cm (½ in) deep , then gently press down the soil to ensure good seed-to-soil contact. Water gently with a fine mist and maintain consistent moisture during germination, which usually occurs in 7 to 14 days .
Thin the young plants to maintain a spacing of approximately 45 cm between each sunflower, allowing good air circulation and optimal stem development.
Moderate watering, equivalent to 2.5 to 5 cm of water per week , is sufficient once the plant is well established.
Flowering, harvesting and maintenance
Flowering occurs approximately 80 to 90 days after sowing , generally between August and September . The flowers can be left in place to feed pollinators or cut as ornamental flowers .
To harvest the seeds, wait until the back of the flower turns yellow and the seeds are well formed. If the harvest is intended for human consumption, protect the flower heads with netting.
Usage ideas
• Edible seeds, roasted or raw
• Natural food for birds
• Giant decorative flowers
• Educational and family garden
• Improvement of biodiversity
The organic black 'Mammoth' sunflower from McKenzie Seeds is a spectacular and generous plant, combining beauty, usefulness, and resilience . A must-have variety for gardeners wishing to cultivate an impressive flower that is both nourishing and beneficial to the garden ecosystem.
