Water in the early morning hours. We recommend planting grass seed in mid-August through September. We suggest that you wait until the new sprouts are of mowing height before an herbicide is applied. You should allow for your application of fertilizer to dry before allowing pets onto the lawn. Mushrooms are a fungi that may be considered a nuisance but do not cause damage to a lawn. If you do not want mushrooms in your lawn, they can be hand-harvested with rubber gloves into a sealable bag and thrown away. Mushrooms are found in cool, moist, areas and will go away as conditions get warmer and more dry. You should expect to see results from our weed control within two (during warmer weather) to three (during cooler weather) weeks. You should expect to see results from fertilizer being put on the lawn within 14 days.