Sunflower Seeds - Mongolian Giant, ORGANIC
$3.25
Helianthus annuus
Mongolian Giant flower stalks can reach a whopping 14 feet tall in four 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 or transplant into the garden after all danger of frost has passed. Sunflowers will need full sun and well-draining soil. Water well to ensure good germination. Once germinated, sunflowers will need at least an inch of water per week. Typically grown for flowers. Annual.
- Planting Information
- Growing Information
Min. Seeds per Packet | Average packet weight | Seeds / gram | Average seed / oz |
| 12 | 1.75 grams | 8 | 240 |
| Planting Season | Ideal Soil Temp | Sun | Frost Tolerance |
| After Last Frost | 65-85°F | Full Sun | Frost Sensitive |
| Sowing Method | Seed Depth | Direct Seed Spacing | Days to Harvest |
| Transplant or Direct Seed | 1" | 4-16" | 90-100 |
| Mature Spacing | Days to Sprout | Production Cycle | Seed Viability |
| 8-12" | 5-12 | Annual | 4-6 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.
Planting
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.