Giant Sunflower - Mongolian Giant Seeds
Price for Package of 10 or 100 seeds.
A true giant reaching up to 420cm (14ft) tall with one of the largest flowering sunflower seed heads available which can achieve up to 45cm (18in) across. The seeds are one of the largest available for Helianthus (Sunflower) and ideal for birds over-winter. Not suitable for exposed sites and will need support.
Days To Germination: 14-21 days
Optimum Soil Temp. for Germination: 68F-86F
Planting Depth: 1/4 inch
Spacing, Seed: 4-6 inch
Spacing, Plant: 24-36 inches
Plant Height: 10-14 ft
Light: Full Sun
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