Overwatering or underwatering can be detrimental to your lawn, and while it isn’t necessary to water every day, it is crucial to water long enough to soak the ground adequately.

You should run your sprinklers about once a week to provide your lawn with 1 to 1.5 inches of water. As it turns out, tuna cans can help you determine how long that will take.

Spread four to six empty tuna cans onto the lawn, each near a sprinkler head. If you're using a garden hose, space them out where they will each catch a decent amount of water.

Check the time before you start watering, and when about 1 inch of water accumulates in the cans (which is usually almost to the top of the can), stop and check the time again.

This is how long you should be watering the lawn each time every week to ensure the ground gets a good soaking. It will typically be somewhere between 15 and 30 minutes.