Lawn and Landscape Checklist - July Keep an eye out for fungal diseases on turf and ornamentals. Do what you can to avoid situations favoring their spread and treat with Lebanon Eagle 0.62G Specialty Fungicide if necessary. Continue to mow lawn at 3 inches to shade the plant crown and roots. Keep faded flowers picked off annuals to encourage continued flowering. Pull any weeds that show up in the yard. If summer heat and lack of moisture is the reason the lawn is starting to turn a little brown, don’t panic. Cool season grasses like bluegrass, fescues and ryegrasses naturally do best in cooler weather. They’ll turn brown for a while but green up again as the weather cools and rains return.