Zoysia grass is a warm-season grass, preferring temperatures in the 70's and 80's. There are several species of zoysia, some slightly more cold tolerant than others. Zoysia has a deeper root system then most grasses, giving it a more drought-tolerant feature. This is a low-maintenance grass that spreads almost invasively, choking out weeds and providing a dense wear-resistant turf. Zoysia will turn brown during the cold dormant season, but greens up well in warm, wetter weather.
Begin watering the zoysia lawn in the spring when temperatures have reached 65 to 70 degrees. This will bring the grass out of the dormant state and help it turn green. Once the lawn is green, water for two hours when you start to see the leaves start to wilt. This will develop a deeper root system.
Apply a slow-release, high-nitrogen fertilizer when the lawn is about 50 percent green. Follow manufacturer's directions on the amount to apply per square footage of the lawn. Repeat the application two months later.
Mow the zoysia grass when it reaches 4 inches in height. Take off only 1/3 of the blade height at a time. Zoysia is very slow growing, so you need to mow often.
Use an aerator to remove thatch in the spring and fall. This is crucial to a healthy lawn. After the spring aeration, mix one part sand to three parts compost and top dress the lawn, providing essential nutrients and better drainage to the soil.