We have planted some creeping thyme in various places around our yard, with mostly good results. However the total area was limited, not nearly as large as what you have pictured here. It does not have a particularly flat growth habit, and dies back more than I expected in the cold of winter (zone 7), which makes it a bit woody and unattractive. It has, however, come back every year since we planted it about 3 years ago. In addition, I have read that it does not grow reliably from cast seeds, and potted plants would be rather expensive for a larger area. I suspect you may not be happy with it as a lawn substitute per se.

That said, it is something I have considered using myself, and would love hear from anyone who has used it with success over a lawn.

As a sort of rebuttal to my own argument, gardengal48 has offered creeping thyme as a lawn substitute for my own troubled yard: [https://www.houzz.com/discussions/starting-over-with-a-yard-ground-cover-dsvw-vd~5254152?n=16[(https://www.houzz.com/discussions/starting-over-with-a-yard-ground-cover-dsvw-vd~5254152?n=16) Using plugs, rather than potted plants or seed.

I think I will give it a try, since all else has pretty much failed! There are many kinds of thyme, so I suppose your milage will vary depending on variey and location. We have planted creeping thyme and lemon thyme. Lemon thyme is the nicer of the two in our yard, and has a fantastic citrus smell, which supposedly will help ward-away mosquitoes. I am skeptical of that claim (but hope to be pleasantly surprised!). It spreads mostly from a central "clump," and kind of died back to that central clump in this year's harsh-ish winter, but has definitely grown from when we planted it last year. None of our thyme has ever bloomed, but that doesn't particularly bother me. I wish I had a greener thumb to make better recommendations, but I am still trying to learn more myself.

Adding any kind of thyme to hardscaping seems like a natural fit.

Nobody cool, I have a question about the creeping thyme that I grew from seed 2 years ago. It was fine and had flower until this month that the center turned brown. But the tip still had some green. If I use it for groundcover, it means I have to replace it when it turns brown? I wonder other people has the same issue. My thyme is called magic carpet.

Thanks