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- 'Mongolian Giant' - (Non-GMO) - Sunflower Seeds - 2 Grams
'Mongolian Giant' - (Non-GMO) - Sunflower Seeds - 2 Grams
These enormous sunflowers grow to 4.5 Metres - 14 Feet Tall. Direct sow into warm soil after last frost. Space plants 3 feet apart. Staking plants or arranging against a fence is beneficial. Organic fertilizer will produce largest plants. When the back of the flower head turns yellow it is ready to cut from the plant. 2 cm (1") Long Edible Seeds. Optimal soil temperature for germination: 21-30°C (70-85°F). Seeds sprout in 10 to 14 days.