Answer: You may discover that the dry patches are cool season grasses that are dormant because of hot summer weather. They may green up when the weather cools. Digging out the worst of the weeds is the best approach, followed by using a corn-gluten based pre-emergent herbicide. It's high in nitrogen, which will help feed your lawn. Next spring you can reassess the lawn and reseed if necessary.
You can purchase WOW, a corn-gluten herbicide, from
5100 Schenley Place
Lawrenceburg, IN 47025
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