Zoysia grass is a warm-season grass native to China, but commonly used as turf grass in home landscapes. But before you plant zoysia seeds in your lawn, be aware that some consider this tenacious perennial grass to be an invasive weed. Because it spreads by both seed and underground root systems, it often creeps its way into gardens and neighbors' yards. And once established, it can take years to get rid of a well-rooted stand.
Contact your county extension office to arrange to have a soil test conducted on the planting area for a nominal fee. Zoysia grass will grow on most types of soil. However, if you have never grown grass in the area before, a soil test can inform you of any major nutritional deficiencies that your soil might have.
Clear any plants, weeds, rocks and other debris from the planting area.
Use a rototiller to till the soil to a depth of 3 to 4 inches. Make one pass over the soil to loosen it. Remove any rocks, roots or other debris that you encounter along the way.
Spread any soil amendments recommended by your soil test over the soil.
Till the soil again at a 90-degree angle to the first pass, to a depth of 4 inches until the soil is an even, fine texture.
Rake the soil smooth.
Fill a lawn roller with water and then go over the soil with it. Make two passes over the lawn. The second pass should be at a 90-degree angle to the first.
Broadcast the zoysia grass at a rate of 1 to 2 pounds per 1,000 square feet. The best way to broadcast seed (by hand or with a seed spreader) is to calculate and set aside the amount of seed you will need for the entire lawn. Then broadcast half of the seed with the first pass over the lawn. Then make the second pass at a 90-degree angle to the first to broadcast the second half of the seed.
Rake the broadcast seed very lightly to mix it into the very top layer of the soil. Then empty the water out of the lawn roller and go over the lawn once to ensure that the seed has good contact with the soil.
Water the soil lightly with 1 inch of water so that the top 2 to 3 inches of the soil are moist. The soil should be kept moist at all times for three to five weeks or until the grass is firmly established.