In one of the most horrific incidents of violence against civilians during the Vietnam War, a company of American soldiers brutally killed the majority of the population of the South Vietnamese hamlet of My Lai in March 1968.
Water the grass seed for 5 to 10 minutes immediately after seeding. Set the sprinkler timer to water the grass seed 5 to 10 minutes three times a day, beginning before sunrise and ending in midafternoon.
After you seed, wait until you've mowed the new grass at least four times, which could be six to eight weeks after seeding, before adding herbicides.f you used a crabgrass preventer, that time frame might extend to four months. Check the herbicide manufacturer's label to confirm how long you must wait, as it can differ between herbicide products. The pre-emergent herbicides stop weed seeds from germinating, but they can stop grass seeds as well.