Lawn aeration: what to know

What the job involves, what changes the price, and what to ask a pro.

What lawn aeration is

Lawn aeration pulls small plugs of soil from the turf so air, water and nutrients can reach the roots. People book it when a lawn is compacted, drains poorly or has been worn down by heavy use, and it often comes before overseeding.

Signs you need it

  • Water pools on the lawn or runs off instead of soaking in after rain or sprinkling
  • The soil is hard a few inches down, and a screwdriver is difficult to push in
  • Grass is thin along a path, around a play area or at the edge of a driveway where people walk and park
  • Roots are short and shallow, and the lawn browns out quickly in summer heat
  • You plan to overseed and want the seed to reach the soil instead of sitting on top of the thatch

What the pro does

  • The pro marks sprinkler heads, buried lines and other utilities, then checks the soil moisture to decide when to aerate
  • The lawn is mowed short and watered lightly so the machine can pull clean plugs
  • A core aerator with hollow tines makes passes in two directions to cover the lawn evenly
  • Plugs are left on the surface to break down, or raked up if they are heavy or cover paths
  • The pro checks the result, goes back over compacted spots if needed, and recommends overseeding or fertilizing if the plan calls for it

What changes the price

Every job is different, so we do not publish prices. These are the things that move the quote up or down.

  • Lawn size and how much of it is open turf the machine can cover
  • Soil type and how compacted the lawn is, which decides whether one pass or several are needed
  • Slopes, tight corners and obstacles that slow the machine
  • Whether sprinkler heads and buried lines have to be marked before the work starts
  • Whether the plugs need raking or hauling away, or can be left to break down
  • Whether overseeding, topdressing or starter fertilizer is added to the same visit
  • Access to the yard for a machine that is heavy and wide

What a written quote should spell out

  • Which areas will be aerated and how many passes are planned
  • Whether sprinkler heads and buried lines will be marked, and who is responsible if one is hit
  • How the plugs will be handled, whether left in place, raked up or removed
  • Whether seed, starter fertilizer or topdressing is included
  • The timing, and whether the lawn needs watering before and after the visit

Questions to ask before you hire

  • Do you use a core aerator with hollow tines, or a spike aerator that only pokes holes?
  • How do you check soil moisture, and when would you decide not to aerate?
  • How do you locate sprinkler heads and buried lines before the machine runs?
  • Will you go over compacted spots more than once, and is that included in the quote?
  • What do you do with the plugs, and how long before they break down?
  • Do you recommend overseeding afterward, and if so, which seed mix suits my lawn?
  • If the machine damages a head or a line, how do you handle the repair?

Red flags

  • They propose a spike aerator for a heavily compacted lawn and describe it as the same thing as core aeration
  • They want to aerate a lawn that is bone dry or soaked, without changing the plan to suit the soil
  • They do not mention marking sprinkler heads or buried lines before the machine starts
  • They cannot explain what they will do with the plugs or how much mess to expect
  • They skip the soil and seed questions entirely and move straight to a quote

What you can do yourself

A homeowner can rent a core aerator and run it over a lawn after watering the soil lightly, as long as the sprinkler lines and buried utilities are marked first. Call a pro if the lawn is on a steep slope, if the machine is hard to control, or if you are not sure where buried lines run. Keep hands and feet clear of the tines while the machine is running.

Licenses and permits

Lawn aeration is not commonly licensed work; if the company also works on sprinkler lines or applies fertilizer or treatments for pay, those services are often licensed separately. Check with your state or local licensing agency.

Lawn aeration questions

Is core aeration better than spike aeration?

Core aeration removes plugs of soil and usually does more for compacted lawns than spiking, which only pushes holes into the soil. Ask the pro which one they use and why it fits your soil.

When is the right time to aerate?

Timing depends on the grass type and your local climate, so the pro should set it. Aerating when the soil is too dry or too wet makes the work less effective, and a good pro will reschedule instead of pushing through.

Do I need to seed right after aeration?

Not always. Overseeding works best soon after aeration, because the holes give seed good contact with the soil. Ask the pro whether your lawn needs seed and what kind.

About this guide

This national guide is written and checked by infinibell. Rules and conditions differ by place, so local pros are credited on guides for the cities they serve, not on national ones.

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