Homeowners place a lot of emphasis on the quality of grass on their lawn, be it sod, plugs, sprigs and even tiny seeds. And while some species are better suited to certain climates, the grass itself has little control over how it grows. People forget that grass is reliant on the quality and condition of the soil in which it is seeded. In some cases the soil can be conditioned beforehand, and in others where it cannot certain methods can be used to help get grass growing right.
One of the best ways to plant grass seeds starts with the bare soil. A tiller is used to cut channels into the soil roughly six inches deep and as close together as possible. This is entirely for the purpose of breaking up the soil. A layer of peat moss or organic compost is spread across the soil and then tilled again to mix it thoroughly. The soil is leveled out with a rake, with a few wheelbarrows full set aside.
Grass seeds are sewn evenly across the soil, keeping in mind that each seed will produce just the one blade of grass to begin with, and then covered with the last of the soil. A lawn roller is used to press the soil down evenly and get rid of excess air pockets, and then it's saturated thoroughly. The soil is kept moist and grass will sprout within two weeks.
The lawn starts bare, with furrows three inches deep cut in parallel rows six inches apart. Fully grown sod is cut into long strips. Pour seed liberally into the furrows and the sod strips are placed over it, well tamped down, and watered thoroughly.
In the presence of similar grass roots, seed will grow and connect with the grass's root system. This speeds the overall growth rate of the grass to the degree that the seed will sprout and spread to fill in the bare spots within six months.
Plant grass seeds in small pots with potting soil to produce plugs. Each plug is allowed to grow until the grass is almost root-bound. Prep the lawn by marking out a grid of 1-foot by 1-foot squares with string, tape, or other materials. At each intersection, an augur is used to cut a hole. In each hole a grass plug is placed, tamped down, and then thoroughly watered.
This method conserves seed and decreases the chances of the grass dying, as it's already sprouted. It can take longer to create an even groundcover, though, than sewing seeds directly into the soil.