About Summer Lawns
After the spring growing season, summer brings quite a bit of stress to lawn grasses. Not only are the heat and drought damaging, but we aren’t as forgiving in the summer as we are in the winter...Most people want their lawns green & lush for outdoor fun an activities and we try to fight nature by continuing to fertilize, water, and coax new growth out of our lawns no matter what the weather!
Here is some helpful information about seasonal changes of turf grasses:
Cool-season grasses (such as fescue, bluegrass, and rye) grow best when temperatures are in the 60s F.
Warm-season grasses (including Zoysia, St. Augustine, Centipede, and Bermuda) like temperatures in the 70s.
Once temperatures get into the 80s and above, lawns will begin to struggle a little, with cool-season grasses having the hardest time. Growth will slow, color may fade, and lawns will show signs of wear and tear as they are less able to recover from stress, traffic, and pet abuse.

Some cool-season lawns will even go dormant in the summer, looking brown and brittle until early fall.