Redwood Seeds Russian Mammoth Sunflower
Best towering floral display for gardeners seeking high germination reliability.
These towering giants reach up to 12 feet, creating a dramatic focal point in any garden. They are highly heat- and drought-tolerant, making them a reliable choice for a bountiful harvest of protein-rich seeds that birds and pollinators will love.
$3.75
at
Redwoodseeds
Who it's for
- Gardeners seeking a dramatic vertical statement in their landscape
- Home growers interested in harvesting their own snacks or birdseed
- Eco-conscious gardeners looking to support local pollinator populations
Who should skip it
- Urban gardeners with limited square footage or small raised beds
- Low-maintenance growers who prefer plants that don't require manual bracing
- Flower enthusiasts wanting continuous blooms throughout the entire growing season
Performance breakdown
Growth Potential
Reaches towering heights that dominate the garden landscape with ease.
Pollinator Attraction
Massive blooms act as a high-traffic hub for local beneficial insects.
Environmental Resilience
Stands up to harsh heat and drought without sacrificing structural integrity.
Harvest Yield
Produces a substantial volume of protein-rich seeds per flower head.
Seed Integrity
Certified organic and open-pollinated status ensures reliable, clean genetic quality.
Ease of Cultivation
Straightforward planting requirements make this accessible for gardeners of all levels.
Key Specs
Botanical Name
Helianthus annus
Plant Type
Flower
Seed Type
Heirloom
Sunlight Exposure
Full Sun
Days to Maturity
80 days
Mature Height
144 inches
Mature Spread
24 inches
Pollinator Friendly
Yes
Edible
Yes
Seed Count
50
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