When it comes to taking care of your lawn, watering is one aspect that is not understood.
You will need to water your lawn twice a week if it's first installed.
On the other hand an established lawn requires water whenever it dries up.
Naturally this would depend on several factors which include the amount of sunlight exposure, humidity, the temperature the type of soil and other factors.
It is best to water your lawn in the morning as it will allow your lawn to absorb as much water as possible during the day.
It is not a good idea to soak your lawn during the night as it invites disease.
Over watering your lawn is also quite dangerous as it can create a wasteful runoff which inturn will take away some of that good soil and nutrition.
Additionally over watering can limit the oxygen supply to the roots.
The correct amount of water to supply to your lawn varies depending on the environment your lawn is in and so there is no exact answer.
Only you will be able to best judge this as you have more experience of how your lawn behaves each day.
A general rule of thumb however is 1 to 1.
5 inches every week.
It is important to understand that you need to just wet the whole root area but not completely make it saturated.
Once you've wetted this area, you need to keep a close eye on how fast the lawn absorbs the water so that you can then understand how often you need to water.
Also let the soil dry between waterings and also note that if you cut your lawn frequently, then it will tend to dry out faster.