Sunflower, Mongolian Giant
- Annual flowers with edible seeds
- Plants grow to 12-14 feet tall
- Flower heads grow to 16-18 inches across
- Seeds grow to 1.5 inches long
- 90 days
(H. annuus) One of the largest-seeded varieties available to gardeners, seeds up to 1½" long. Great for eating. Plants can grow 12-14' tall with gigantic yellow heads reaching 16-18" across! Annual, 90 days.
Learn to Grow it
This crop can be direct seeded into warm soil after the last spring frost. If you sow a section or row every two or three weeks, you can get a continuous crop.
Space your plants or seeds 6-8 inches apart in well fertilized soil. Plant your seeds 1/4-3/4 in. deep.
Make sure that your soil is well fertilized as this crop is a heavy feeder and takes a lot of nutrients from the soil. Consider adding compost to the soil the year before you plant.
These plants prefer warm weather and soil so they should be grown when temperatures are over 68 degrees F.