how long to water grass by hand
Run your sprinkler and see how long it takes to get a half inch of water in the can â just like a rain gauge. Usually itâs about 30 minutes. So 20 minutes, 3 times per week will get an inch of water on your lawn, and 30 minutes 3 times per week will get 1 Â½â down. Bear in mind that during extreme heat, you will need to water more, due to evaporation and heat stress on the grass.