Should you aerate sandy soil?
Consequently, how do you aerate your soil?
Soil aeration is usually done either with a plug aerator or a spike aerator. A plug aerator removes actually cylindrical plugs from the soil. A spike aerator pokes holes in the soil with a spike. Most lawn professionals recommend using plug aeration because piercing the soil with spikes may cause more soil compaction.
In this regard, when should you not aerate your lawn?
Never aerate dormant lawns. For cool-season grasses common in northern lawns, early fall or early spring are the best times for aerating. For warm-season grasses common to southern lawns, the best time for aerating is late spring or very early summer.
M.B.: Always aerate first. You want to make holes in the turf so your lime, fertilizer or grass seed has a place to fall and make good soil contact. Lime and fertilizer can wiggle down into the soil eventually even if you don't aerate, but you should always aerate before you reseed.