Greens aerification is just around the corner as we are scheduled to aerify as part of our overseeding process Oct 27th through Oct 30th. At WR we supplement our 2x/year hollow tine aerification of our greens with aggressive verticutting and topdressing, as well as a "venting" in August using 1/8" solid tines (no cores)Here is a brief video which explains this most important cultural practice.