What is core aeration?

Core aeration pulls small plugs or cores of soil from a lawn using a machine with hollow tines or spoons. These plugs, typically one-half to three-quarters of an inch in diameter and two to three inches deep, are left on the surface to break down naturally. The process relieves soil compaction that builds up from foot traffic, equipment use, and weather over time.

Compacted soil restricts root growth and limits water and nutrient movement through the lawn. By creating channels and fracturing the compacted layers, core aeration allows better infiltration and creates space for roots to spread. This is especially important in high-traffic areas and on clay-heavy soils common in Connecticut.

In New England, core aeration is typically performed in fall (September through November) when grass is actively growing and soil moisture is steady. Fall work allows roots time to establish before winter. Spring aeration is possible but generally less effective in the Northeast.

Core aeration differs from spike aeration, which uses solid tines to puncture the soil without removing material. Spike aeration can actually increase compaction by pushing soil inward, whereas core aeration physically removes compacted material. For lawns showing poor drainage or thin growth, core aeration delivers more meaningful results.

Landscapers offering lawn care and maintenance services typically recommend aeration every one to three years depending on lawn condition and usage patterns.