Just wondering if you can (or should?) aerate, dethatch, slice seed and fertilize a lawn all at once or wait and do each one at different times (spring and fall) of the season. I live in Mass and am just a homeowner, also if you do all at once what order should I do them in? My lawn is in pretty good shape, but I want it to look perfect this year. I have irrigation as well if that plays any role as in what to do do get it GREEN! Thanks in advance.