Certified GKH Gardening Expert
There are a few causes for this. In most cases, this is from patches of cool season grasses growing faster than other grasses in the area when the weather becomes just right for it.
You are in the "transition zone" for grasses. This means that it is necessary to seed your lawn with a mix of warm and cool season grasses. When it isn't mixed, thoroughly, it can cause patches of quick growing grasses during this time.
Sometimes, reseeding with cool season grasses can help the patchiness, but it may take until next year to see results from this.
These articles will help you to choose cool and warm season grasses:
Hey thanks! I had no idea that it could be related to the season. The grasses do look different, yet healthy, so this makes good sense to me. Much appreciated!