As a rule, landscapes need an average of an inch of moisture a week, extension agent Rebecca McMahon said. The average is over the course of the year; in winter, you won’t water as much, and in the hot parts of summer you may water more.
The 1-inch rule applies to grass, too, especially fescue.
The 1 inch of water should be applied at one time, as long as the water does not run off. (If it does, stop the water, wait an hour or so, and start watering again, repeating until the inch has been applied and goes into the soil instead of down the street.) This deep, infrequent watering causes roots to reach deep and produces healthier grass that doesn’t need as much water.
Rainfall should be subtracted from the amount of water you put on the landscape.
To save on water, all Wichita lawns can be allowed to go dormant in the summer, at no detriment to their health.
Here’s how much water your grass needs, based on type and weather. Pair the guidelines with getting to know your grass and digging into the soil a couple inches to check the moisture level before watering.
For warm-season grasses Bermuda, zoysia and buffalo: