Brown spots during the summer can stem from a number of different culprits and are very common. Is it a disease? Is it bluegrass or perennial ryegrass going dormant? Or is it something else? Usually it’s a mix not being formulated for the region or inferior genetics.
Be sure to choose a product developed for your specific climatic region and look for newer and improved varieties.
Mountain View Seeds Grass Seed gives you thicker, greener grass with less inputs and less water.