Sunflower Seeds - Mongolian Giant, ORGANIC


Helianthus annuus

ORGANIC. Flower stalks can reach a whopping 14 feet tall in 4 months! Huge 16-18 inch heads bear some of the finest eating seeds we've tried. This sunflower produces the kind of blossoms that will win you a blue ribbon in the county fair! Direct seed in full sun after danger of frost. Summer-fall blooming. Annual.  

  • Planting Information
  • Growing Information


Approx. Seeds per Packet 
Average packet weight 
Seeds / gram 
Average seed / oz
1.75 grams
Planting SeasonIdeal Soil TempSunFrost Tolerance
After Last Frost65-85°FFull SunFrost Sensitive
Sowing MethodSeed DepthDirect Seed SpacingDays to Harvest 
Transplant or Direct Seed1"4-16"90-100
Mature SpacingDays to SproutProduction CycleSeed Viability
8-12"5-12Annual4-6 years

Site Selection


Sunflower is a frost sensitive annual that prefers full sun and well-drained soil with low to moderate moisture. Drought tolerant once established.




Direct seed outdoors once the danger of frost has passed. Optimum soil temperature for germination is 65-85˚F. Sow 1" deep and 4-6" apart. Seeds will sprout in 5-12 days. Thin so mature plants are 8-10" apart.