Here's why: Given the volatile nature of the weather through the summer (July/ August) it is better to do less than more when it comes to your grass.
Spraying weed controls like Fiesta can burn the grass when temperatures tip 30 C (including humidity.)
Unchecked fertilization may cause more harm than good and potentially burn the grass.
Cutting weekly is not advised, especially if the lawn has not been regularly watered. If the turf is dry, foot traffic will only make it worse. It is wise to keep the mower on the highest setting anyway, to protect the soil from burning. Subsequently, heavy equipment on grass and excessive lawn activity should be minimized.
A short cropped lawn during the summer will lead to excess crabgrass and insect problems. Insects can be addressed, but the damage caused will have to wait until fall to recover, since seeding or sodding in the heat is a waste of money and resources..
Crabgrass is an annual weed and will also die when the weather cools off. But bare patches will have to be addressed by fall seeding (after Labour Day.)
Generally, lawns with major issues in July and August are the ones that have seen neglect, or have been improperly treated at some point in the spring.
Having a healthy lawn takes patience and persistence, and you don't get there by applying everything in your arsenal all at once
.