There is an old saying that what is done cheap and quick is not done well, what is done quick and well is not done cheap, and what is done cheap and well is not done quick. Lawn care and propagation is no exception. If you want to seed your lawn so that it will grow in well without paying a fortune, it will take you some time and physical labor.
Using Plain Seed
One of the biggest reasons a seeded lawn fails to germinate is soil impaction. If the soil is too hard, the seed cannot take root. To remedy this, the lawn must first be tilled and aerated. Add a natural fertilizer such as peat moss or compost into the soil and till it again. Rake the soil flat, with a small amount being kept aside for later. Sprinkle seeds by hand across the soil to a consistency of roughly one seed for every square centimeter. The seed should be lightly covered with the last of the soil and saturated once every other day so that the ground stays moist but does not squelch if walked upon. The first sprouts will appear in two weeks.
Plugs take even longer to grow than seeding the ground directly, but they take far less seed to produce. The soil must be raked flat and a grid marked out into one foot square squares. Plant seeds in pot containers and keep them moistened to produce plugs within a month of seeding. Holes must be dug at every junction of the grid and the plugs planted there and watered. It may take several months for the grass to spread into a comprehensive groundcover, but the danger of the grass seed not sprouting is circumvented this way.
Sprigs are used in conjunction with seed when mature grass sod is already available. Cut parallel furrows into the soil every 6 inches and place a thin trail of seed in them. Then, cut sod into thin strips, fit them into the furrows, press down, and water. This works on a concept known as companion planting. When grass grows, the root systems connect with one another to form a support system. This helps the grass as a whole in fighting infection, absorbing nutrients and disseminating moisture where it's needed. When the grass seeds sprout in several weeks, they quickly connect with the matured grass's root system and grow at an accelerated rate as a result.