Holes in the Lawn, Aeration.
There is no ‘perfect time’ to aerate a lawn. In spring the optimal window for aeration is March through April. We do not recommend to aerate in fall as holes left by aerator may not fill in prior to winter freeze and dryness. Aeration done in fall can potentially cause winter kill in lawns. The deeper the aeration tine or spike the better especially on heavy clay. Aeration can open up spaces in soil for water and nutrients to get closer to the root system of grass plants. Ae