Transform your landscape with the staggering size and beauty of giant Mammoth Russian Sunflowers! Famous for incredibly sturdy, towering stalks that can easily reach 10 to 12 feet tall, these massive heirloom flowers develop huge classic yellow blooms with impressive brown centers reaching over a foot across. They are spectacular garden border plants and produce a staggering amount of heavy, edible striped seeds.
These untreated seeds ensure a robust germination rate, making them a perfectly easy project for enthusiastic gardeners of all skill levels. Mammoth Sunflowers are robust enough to create quick summer privacy screens due to their amazing height.
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PURE & UNTREATED
Sourced securely to ensure completely natural growing conditions; untreated and reliable for family gardening.
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MASSIVE BLOOMS
Develops enormous classic bright yellow blooms that track the summer sun and create staggering visual impact.
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TOWERING HEIGHT
Unbelievably fast growers reaching 10 to 12 feet tall, creating spectacular and impressive summer screens.
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EDIBLE & BIRD FRIENDLY
Produces heavy crops of large striped seeds perfect for roasting or feeding local songbirds.
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GENEROUS SEED COUNT
Includes exactly 100 fresh, large seeds per packet, ensuring a majestic high-yielding harvest.
1. Starting Indoors
Sunflowers possess a highly sensitive taproot. Better to direct sow, but you can start indoors in biodegradable peat pots 3-4 weeks before your last frost.
2. Germination
Maintain consistent moisture and a warm temperature of 70-80°F. Seeds usually germinate rapidly in 7-10 days.
3. Hardening Off
Gradually introduce seedlings to outdoor conditions over 7 days after the danger of frost has entirely passed.
4. Transplanting
Direct sow or plant outdoors in full sun, spacing them 24-36 inches apart to allow room for enormous growth. Bury the seedling correctly to avoid root disturbance.
5. Care
Water deeply at the base. Though incredibly sturdy, their towering height may require support or staking in areas prone to very high winds.
