Is there anything wrong with aerating cool season lawns right now before the first application of dimension? I have always read that you should do it during the growing seasons spring/fall here, but the lawns are still dormant where i am. the roots are not growing right now, but if the soil is thawed enough to pull plugs the aeration will still help once the lawn starts growing again in a couple weeks right? still helping relieve compaction and eventually the roots will grow toward the opening correct? what about i have seen lawns with holes in them still from a late fall aeration? that can't be good or does it matter that much?