I started the aeration season right after the Labor Day weekend and ran multiple passes over areas that needed complete renovation while other small patches were just part of the aeration process... The large areas with multiple passes were leveled with a weasel and seeded, sometimes with compost. Some small patches were not roughed up with the weasel due to time constraints, but seed was sprinkled there to see if the plugs would support any seed growth... Well they did not... but I do have many lawns with these bald spots now filled in with doll hair type plugs. The Question is: Do these plugs ever survive through one year's growth? and beyond that, do they ever spread lik ryegrass and KGB normally would?