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You can use your hand, but an actual seed spreader is best, because it gives you more even coverage. You should spread the seeds so that you have approximately one seed per 1 square inch (2.5 square centimeters) of space. The package of seeds should tell you how many pounds of seed you should use per 1,000 square feet of planting area, to give you a better idea of how much seed you need for large areas.
Spread your seeds.