Why Is My Lawn Growing Clumps

Question

My lawn was re-turfed last summer with new topsoil that all looked good. This summer is is growing rather extreme clumps. They seem very healthy and have kept going well through the dry weather but the rest of the lawn is nowhere near and barely growing at all now. They look rather odd. This photo is from spring, before the dry spell. They are still prominent now in mid-summer. We have a dog but I’d have expected patches of poor growing grass rather than patches of good growing grass if that as the cause. I put lawn feed on a couple of months ago but hasn’t seemed to have made much difference.

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Answer 1

If it is invasive, it should spread, naturally. You can experiment with taking a patch, digging it up, and spreading pieces of it around your yard. Sometimes, this works.

Answer 2

It appears that a different grass may have invaded those spots. You may need to kill off these spots of grass.

https://www.gardeningknowhow.com/plant-problems/weeds/how-to-kill-grass-naturally-kill-unwanted-grass-in-your-yard.htm

https://www.gardeningknowhow.com/plant-problems/weeds/using-herbicide-in-gardens.htm

Answer 3

The "invasive" patches of grass seems to be much better than the grass covering the majority of the area! I was wondering if (and if so, then how) I should encourage this to spread).