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Non-GMO
Mammoth Russian Sunflower
$4.50
Packet - 1 oz.
Flat $7.99 shipping
Germination guaranteed
Non-GMO
Not sure when to plant in your area?
Planting dates depend on your local frost dates and growing zone.
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Quick Facts
Days to Maturity75 days
Spacing18–24 in.
Germination7–10 days
Growing Information
Growing Mammoth Russian Sunflower
‘Mammoth Russian’ is an heirloom, open-pollinated sunflower prized for its towering height, enormous flower heads, and useful edible seeds. Impressive plants can reach 7 to 10 feet tall, producing huge, disk-shaped flower heads that create a commanding garden display while developing an abundant crop of seeds.
Plant ‘Mammoth Russian’ seeds about 1 inch deep and space plants 18 to 24 inches apart. Sow after the soil reaches about 65 to 70°F, as this variety is very sensitive to frost. Germination typically takes 7 to 10 days. Established plants offer excellent heat and drought tolerance.
Ready to bloom in about 75 days, enjoy the enormous flowers as they open and mature. Allow the heads to continue developing if growing the plants for their useful seed crop.
Tall, productive, and versatile, ‘Mammoth Russian’ is an excellent choice for ornamental plantings, edible seed production, drying, bird gardens, and dramatic back-of-border displays.
One oz. contains about 275 seeds.
Sowing depth
1 in.
Plant height
8–12 ft.
Botanical name
Helianthus annuus
Questions
FAQ
How deep should I sow the seeds?
Sow at a depth of 1 in.
How long until they germinate?
Typical germination: 7–10 days.
How far apart should I space them?
Recommended spacing: 18–24 in..
What’s your germination guarantee?
We stand behind the germination quality of our seed. If you have a germination issue, contact our team and we'll help make it right.
Mammoth Russian Sunflower$4.50 · Packet - 1 oz.
REAL GARDENERS, REAL RESULTS