A thin patch in a Montrose lawn usually has a reason, and the reason is usually water, soil, or the way the sun hits that one corner from June onward. Fermin's LawnDoc of Montrose works from that reading, shaping mowing, trimming, edging and cleanup around what a particular yard is actually doing. Ground here is heavy and alkaline and it does not forgive guesswork. Attention pays it back though: grass that thickens, color that holds through the hottest stretch of the summer, edges that stay where you put them. Watching a struggling yard come back is the best part of the job.