Russian Mammoth Sunflower Seeds (Organic)
Best giant sunflower seeds for home gardeners seeking dramatic, edible blooms.
Cultivate impressive giant sunflowers with Organic Russian Mammoth Sunflower seeds. This classic, open-pollinated variety is organically grown and known for producing massive flower heads up to 10 inches in diameter. The golden petals surround edible, white and grey striped seeds. These sunflowers bloom from late summer to fall, attracting bees and butterflies. They thrive in full sun and can reach heights of 10 to 15 feet, requiring staking as they mature. Each pack contains approximately 25 seeds, perfect for adding dramatic height and edible treats to your garden.
$3.49
Owner Satisfaction
4.7
/ 5
Category Rank
190
/ 5876
#190 in Seeds & Seed Tape
Price vs Category Average
-67%
Below average
Scientific Name
_Helianthus annuus_
/ _Helianthus annuus_
Who it's for
- Gardeners seeking a dramatic vertical focal point
- Homesteaders interested in harvesting homegrown snacks and bird feed
- Eco-conscious growers prioritizing non-GMO and sustainable gardening practices
Who should skip it
- Beginners wanting low-maintenance plants resistant to pests and disease
- Gardeners in regions with short, cool growing seasons
- Urban gardeners with limited space or windy growing conditions
Performance breakdown
Growth Potential
Reaches staggering heights that create an instant, dramatic garden focal point.
Pollinator Impact
Large blooms act as a magnet for local bees and butterflies.
Edible Yield
Produces a generous harvest of classic striped seeds perfect for snacking.
Ease of Cultivation
Straightforward planting requirements make these ideal for novice green thumbs.
Structural Integrity
Significant height necessitates proactive staking to prevent wind damage.
Organic Purity
Certified organic seeds ensure a clean, chemical-free start for your garden.
Key Specs
Scientific Name
_Helianthus annuus_
Life Cycle
Tender Annual
Organic Status
Organically Grown
Height At Maturity
10'-15'
Sun Requirement
Full Sun
Planting Depth
1/2"
Days to Germinate
7-14 Days
Approx. Seeds Per Pack
25
Features
- Produces giant flower heads up to 10 inches.
- Edible, striped seeds for snacking.
- Organically grown and open-pollinated.
- Attracts beneficial pollinators.
- Ideal for beginner gardeners.
- Blooms late summer to fall.
- Reaches impressive heights of 10-15 feet.
What customers say
Customers express overwhelming satisfaction with these organic Mammoth Sunflower Seeds, primarily praising their exceptional quality and reliable performance. The germination rate is consistently reported as near perfect, leading to quick and robust sprouting. Gardeners value the organic certification and the seeds' ability to deliver on the 'Mammoth' promise, producing impressively tall stalks and large flower heads. While the initial cost is higher than standard options, reviewers agree the superior viability and successful yield fully justify the investment. This product is viewed as a highly trusted choice for achieving dramatic visual impact and a successful harvest.
Know before you buy
Yes, because these sunflowers can reach heights of 10 to 15 feet, they are prone to tipping over in high winds. It is recommended to stake them as they mature to ensure they remain upright.
Absolutely. The Russian Mammoth variety produces large, striped seeds that are edible and excellent for snacking once harvested and dried.
Given their massive size and height, you should space these plants at least 2 to 3 feet apart to ensure they have enough room for their root systems and foliage to thrive in full sun.
Yes, these are open-pollinated seeds, meaning you can harvest the seeds from your mature flowers at the end of the season and replant them the following spring with consistent results.
These sunflowers typically bloom from late summer into the fall. They are a tender annual, meaning they complete their life cycle in one growing season.
Due to their extreme height and deep root requirements, these are best suited for direct planting in the ground. They are generally too large and top-heavy for standard garden containers.
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