Refill the container as needed. Leave the container in place until the plant puts on several inches of new growth. Mowing Mow the lawn often, at least once a week. Try to cut no more than one third of the grass blade, removing about one half to three quarters of an inch at a time. If you mow the grass shorter than this, excessive shock occurs that causes grass to turn yellow despite your best sprinkling efforts.
Longer grass means less evaporation.
Adjust your lawn mower to a higher setting. The grass blades grow longer and shade one another, as well as the ground, helping to fight off heat and hold moisture longer. Please don't let the hose run. Instead, wet the car thoroughly, then turn off the hose while you swab the car with soapy water from a bucket. Use the hose again for a final rinse.