Mammoth sunflower
Helianthus annuus
HOW TO GROW SUNFLOWER
Start indoors 4 weeks before last frost for the earliest sunflowers in your garden and to market. Direct sow 1 to 2 weeks after last frost. We let the birds take the first seeds before we harvest our sunflower seeds. This will also help volunteer them around your garden over the years. Tall plants may need support. Plant out directly after last frost. Growing repeatedly in the same location, sunflowers have an allopathic affect deterring the growth of several mustards and other weeds with a herbicide from their roots. Soil pH 4.5-8.7. Hardiness zones 7. Annual.
Days from maturity calculated from the date of seeding. Average between 560-1,120 seeds per ounce. Federal germination standard: 75%. Usual seed life 7 years. Isolation distance for seed saving: 1/2 mile.
Planting Depth 1”
Soil Temp. Germ. 60-70˚F
Days to Germ. 5-10
Plant Spacing 1-2’
Row Spacing 24-36”
Days To Maturity 110
Full Sun, Moist Well Drained
Days from maturity calculated from the date of seeding. Average between 560-1,120 seeds per ounce. Federal germination standard: 75%. Usual seed life 7 years. Isolation distance for seed saving: 1/2 mile.
Planting Depth 1”
Soil Temp. Germ. 60-70˚F
Days to Germ. 5-10
Plant Spacing 1-2’
Row Spacing 24-36”
Days To Maturity 110
Full Sun, Moist Well Drained
- 30 Seeds$4.10
Kids will love this giant sunflower. 8’ plus tall in good soil, large 10-12” plus heads. This classic sunflower was first offered in the 1880's. Still widely prized for its gigantic flowers and abundant, nutritious white and gray striped seeds. Number of seed heads is variable. Tags: Color: Yellow, Certification: Or...
Kids will love this giant sunflower. 8’ plus tall in good soil, large 10-12” plus heads. This classic sunflower was first offered in the 1880's. Still widely prized for its gigantic flowers and abundant, nutritious white and gray striped seeds. Number of seed heads is variable. Tags: Color: Yellow, Certification: Organic.
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We promote fair trade, organic practices and environmental responsibility throughout the Restoration Seeds supply chain. Below are the family farmers and seed suppliers who bring our open pollinated seeds to you.
Restoration Seeds
Certified Organic by OR Dept. of Ag.
Seed grower since 2009
Restoration Seeds is a farm-based seed company committed to selling seeds growers can save. We guarantee high quality seeds through our extensive variety trialing and plant breeding programs. We empower family farmers and home gardeners by offering 100% Open Pollinated seeds.
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