Planting grass seed is more economical than planting sod—and it's a great solution for growing a beautiful new lawn or filling in bare spots in an existing lawn. When selecting the best grass seed to buy, the two most important considerations are your grow zone and the amount of sunlight the lawn receives. Grass seed mixes for shade are available for lawns that receive less than six hours of direct sunlight daily. Before sowing grass seed, prepare the planting area by tilling or spading the soil so that it's a fine, granular texture. After sowing, make sure the grass seed bed receives regular watering until it germinates and becomes established.