Aerate lawn

Aerate your lawn to relieve soil compaction and promote healthy grass growth.

Why it matters#

Compacted soil prevents water, air, and nutrients from reaching grass roots. Aeration creates channels for these essentials, resulting in a healthier, greener lawn.

What you'll need#

Tools#

• Core aerator (rent from hardware store)
• Garden rake
• Lawn mower
• Sprinkler or irrigation

Materials#

• Lawn flags (to mark sprinkler heads, shallow utilities)

Steps#

1. Choose the right time#

Aerate cool-season grasses (Kentucky bluegrass, fescue) in fall. Aerate warm-season grasses (Bermuda, zoysia) in late spring. Avoid summer heat and winter dormancy.

2. Water the lawn#

Water deeply 1-2 days before aerating. Soil should be moist but not soggy—this allows the aerator to penetrate properly.

3. Mark obstacles#

Flag sprinkler heads, shallow irrigation lines, invisible fence wires, and other buried objects.

4. Mow the lawn#

Cut grass slightly shorter than usual so the aerator can penetrate easily.

5. Make first pass#

Push or drive the aerator across the lawn in parallel rows, similar to mowing. Overlap slightly.

6. Make a second pass (for compacted lawns)#

For heavily compacted soil, make a second pass perpendicular to the first.

7. Leave the cores#

Don't remove the soil plugs—they'll break down and return nutrients to the lawn within a few weeks.

8. Water after aerating#

Water lightly after aeration to start the recovery process.

9. Overseed and fertilize (optional)#

Aeration is an ideal time to overseed bare spots and fertilize. Seeds and nutrients reach the soil through the holes.

10. Resume normal watering#

Return to your regular watering schedule, keeping the lawn consistently moist.

Pro tips#

• Rent a core aerator—manual tools are exhausting and less effective for large areas
• Aerate annually for high-traffic lawns or heavy clay soil; every 2-3 years for other lawns
• Schedule aeration before overseeding for best seed-to-soil contact
• The cores will disappear in 2-3 weeks as they break down

Warnings#

• Don't aerate during drought or heat stress—it damages the lawn
• Avoid aerating newly seeded or sodded lawns less than 1 year old
• Mark sprinkler heads to avoid damage from the aerator
• Skip aeration if soil is too wet or too dry

When to call a pro#

Lawn care companies offer aeration services ($75-200 for average lawns) if: you don't want to rent equipment, have a very large lawn, or want to combine with overseeding and fertilization.