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Mckenzie Seed – Sunflower Black Mammoth Organic

Gravel/Soil/Mulch Estimator

Mckenzie Seed – Sunflower Black Mammoth Organic


Black Mammoth is a fast and easy growing sunflower that is sure to be a favorite. Prized for its bright yellow flowers, it produces an abundance of delicious seeds to be enjoyed. Its giant flowers are a marvelous sight as they grow up to 30 cm (12”) across on plants that reach up to 2.5-3 m (8-10’) in height!

Helianthus annuus



Plant Type: Annual

Color: Bright yellow with brown centers

Grows Best In: Full Sun

Days to Germination: 7 to 14 days

Bloom Season: August to September

Planting Depth: 1.3 cm (1/2″)

Growing Height: 2.5-3 m (8-10′)

Instructions: After all danger of frost, sow seeds in open ground well exposed. Cover with 1 inch of soil. When plants are 4 inches tall, thin. Needs lots of water.

Suggestions: A very sturdy plant to use as a windbreak.

Product Weight: 4.5 grams