KBG. Eastern Iowa. 1.Aerate 2.Halts 3.Grubex 4.Milorganite. Would that be overkill to do all at once? Thanks.
It would be a waste of time and money all at once.
All you might need is Milorganite. You might want Halts but if you're watering deeply and infrequently and mowing at 3-4 inches high, then you should not have any weeds.
Is your soil hard? Is that why you want to aerate? Search this forum for "shampoo hard soil" to find my previous discussions about softening soil with baby shampoo instead of aeration. It really works.