Years ago I had Mother of Thyme and Yarrow escape from flower beds and spread through the lawn. I love the Thyme and encourage its growth throughout the lawn and hope it takes over more and more in the future. I'm not as crazy about the Yarrow, but it has spread through some areas and replaced the turf and I mow it along with the turf grass.

When the Mother of Thyme that is in a big patch of my front lawn blooms, I'll try to remember to take a pic and link to it.

A.