Mowing tips
The easy answer would be once per week in the growing season. A good rule-of-thumb is to remove no more than one-third of the grass height at any one mowing. For example, if you are maintaining your lawn at 2 inches, mow the lawn when it is about 3 inches high. Cutting off more than one-third at one time can stop the roots from growing and will require more frequent watering during the heat of summer to keep the grass alive and healthy.
Following the one-third rule will produce smaller clippings that will disappear quickly by filtering down to the soil surface. If the grass becomes too tall between mowings, raise the mowing height and then gradually reduce it until the recommended height is reached. For the best appearance, mow and maintain your lawn at the best height for growth as determined by the type of grass you have.
You can usually mow a grass that spreads horizontally shorter than an upright-growing bunch-type grass. Grasses with narrow blades can generally be mowed closer than grasses with wide blades. If your lawn is under stress-such as heat, drought or shade-mow at a higher level of cut. Proper mowing is important in maintaining a healthy lawn because it encourages a dense stand of grass plants. A dense turf keeps out weeds through competition for sunlight and nutrients. A weak, thin turf allows weed seeds to germinate and grow.
Mowing practices can also affect the occurrence of disease. Many times an increase in disease can occur when turf is cut too low or is mowed when the foliage is wet.
One final tip: Don’t mow in the same direction each time. Alternate your mowing direction and you’ll have more upright grass growth and a smoother-looking lawn.