Sunflower Russian Mammoth Seeds – Heirloom Giant Towering Classic
- Ontario Grown
$1.95
SKU: GS-5394-SUN-DT
- Free shipping on orders over $50 (in Canada)
- Organicly grown
- Non GMO
Description
Sunflower 'Russian Mammoth' (Helianthus annuus), also known as Mammoth Russian, is the legendary 19th-century open-pollinated heirloom giant that sets the standard for giant sunflowers. Growing into massive, tree-like single stalks reaching 10 to 14 feet (or more) in height with thick, heavy-duty trunks, it produces huge single flower heads measuring 12 to 20 inches across. The enormous golden-yellow blossoms feature a thick ring of vibrant ray petals surrounding a dense central disk packed with hundreds of plump, striped gray-and-white seeds. Beyond its impressive garden scale, Russian Mammoth is grown for edible seed production, wild bird feeding, living garden architecture, and children's garden projects.
Specifications
- Plant Name: Sunflower 'Russian Mammoth' / 'Mammoth Russian' (Helianthus annuus)
- Cultivar Type: Heirloom, Open-Pollinated (19th-Century Russian Classic)
- Plant Class: Warm-Season Annual Flower & Seed Crop
- Color: Classic golden-yellow petals surrounding a massive dark yellow-green to brown seed disk
- Plant Characteristics: Giant single-stem growth habit (120–168+ inches tall / 3–4.2+ m), extra-thick woody stalk, broad rough foliage, single massive flower head (12–20 inches wide), heavy seed yield
- Suitable Space: Garden backdrops, property borders, living privacy fences, bird-seed gardens, children's garden plots, competition gardens
- Season: Midsummer through Autumn (Warm-Season Annual, ~80–100 Days to Seed Maturity)
- Best Time for Sowing (Zone 6b): Direct sow outdoors late May once soil temperatures reach at least 18°C (65°F)
- all frost danger has passed. Sow seeds 1 inch deep, spaced 12 inches apart,: all frost danger has passed. Sow seeds 1 inch deep, spaced 12 inches apart,
- thin to 18–24 inches apart to allow proper root anchorage. Avoid indoor starting unless using deep biodegradable pots, as taproot restriction stunts plant height.: thin to 18–24 inches apart to allow proper root anchorage. Avoid indoor starting unless using deep biodegradable pots, as taproot restriction stunts plant height.
- Sunlight: Full Sun (6+ hours direct sunlight daily; maximum light required to support heavy stalks)
- Watering Needs: Moderate (requires consistent moisture
- heavy feeding during rapid vegetative growth; moderately drought-tolerant once mature): heavy feeding during rapid vegetative growth; moderately drought-tolerant once mature)
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