Certified GKH Gardening Expert
Well, this would be difficult to do. Either remove the primroses from the lawn and transplant elsewhere so you can keep the yard mowed or allow the primroses to stay and forego on the mowing. Of course, if you leave the primroses, you should know that they will just continue to reseed and eventually cover the area. Mowing them down will help keep them under control before they set seed.