Originally Posted by phasthound
Here is some good info from UMass:https://extension.umass.edu/turf/man...hoots-vs-roots
As for irrigation; it's best to water deeply and infrequently. The idea is to get the soil wet down to the root system and then allow it time to dry out before watering again. Usually an inch of water is recommended for each watering. Every irrigation system is different. Measure yours by putting empty tuna cans on you lawn and time how long it takes to fill it up. How often you irrigate depends on soil type, sandy soil requires more frequent than clay soils. And my pet peeve is seeing irrigation during rainy days.
This type of watering only works if one's lawn has the ability to hold the water. Without knowing the gentlemans soil structure you are doing him a disservice telling him to water that way.