How to Use a Spike Aerator: When It Helps and How to Do It Right

Last updated: October 2026 · Written by the LawnVibe editorial team.

Spike aerators are cheap, simple and easy to store, which makes them popular. They are also widely misunderstood. A spike aerator pokes holes with solid tines instead of pulling out plugs, so it works very differently from a core aerator. This guide explains how to use a spike aerator properly, when spiking actually helps, when it does not, and how to get the most out of one if that is what you have.

For the full aeration method with a core machine, see our main guide on how to aerate a lawn.

How spike aeration differs from core aeration

A core aerator removes small plugs of soil, leaving open holes and relieving pressure in the surrounding soil. A spike aerator pushes solid tines into the ground, which opens a hole by moving soil sideways and downward. On loose soil that is fine; on compacted soil, the pressure can pack soil even tighter around each hole. For a deeper comparison, see our guide on core vs spike aeration.

The upside of spike aerators is that they are inexpensive, light, easy to store and quick to use. They also leave no plugs on the lawn, which some homeowners prefer. The downside is that their benefits are smaller and shorter-lived than core aeration, especially on heavy or compacted soil.

Types of spike aerators

When a spike aerator makes sense

In short, spike aerators are best for light, short-term surface opening on soils that are not seriously compacted. If your lawn shows clear compaction signs, such as puddling, hard soil and thin traffic areas, use a core aerator instead. Our guide to the signs your lawn needs aeration explains the tests.

How to use a spike aerator step by step

Step 1: Choose the right time

Spike when the grass is actively growing: early fall or spring for cool-season grass, late spring to early summer for warm-season grass. Avoid heat waves and drought.

Step 2: Moisten the soil

Water about an inch a day or two before, or work after a soaking rain. Spikes need moist soil to penetrate. Avoid soggy conditions, which smear and compact soil around each spike.

Step 3: Mow and clear the lawn

Mow at your normal height and remove sticks, stones, toys and hoses. Flag sprinkler heads, which spikes can crack.

A quick moisture check: push a screwdriver into the soil. If it slides in a few inches with moderate effort, the soil is ready for spiking.

Step 4: Add weight if possible

Rolling and tow-behind spike aerators often have a weight tray. Adding sandbags, concrete blocks or other approved weights helps spikes sink deeper. Follow the manufacturer's weight limits.

Remove the weights before loading the aerator into a vehicle or moving it across hard surfaces.

Step 5: Make multiple passes

Work in straight rows, overlapping slightly. Then make a second pass at an angle, and a third on areas that need it. Multiple passes increase hole density, which is the main way to get more benefit from spiking.

Keep a steady walking pace throughout.

Step 6: Use a hand spike fork for spots

For small compacted spots, push a spike fork in by foot every few inches, rock it gently to widen the hole, and pull it out. This is more effective than a rolling spiker in tight areas.

Step 7: Follow up

Spike aeration is most useful as a preparation step:

• Overseed right after spiking so seed falls into the holes.
• Topdress with a thin layer of screened compost to fill holes and improve soil over time.
• Fertilize so nutrients move into the opened surface.
• Water lightly to settle everything in.

How far apart should the holes be?

Hole density matters more for spike aeration than for core aeration, because each spike hole does less. Aim for holes a few inches apart across the lawn. A single pass with most rolling spikers leaves holes several inches apart, so two or three passes in different directions bring spacing closer. With a hand spike fork, step forward only three or four inches between pushes.

Spike aerators vs aerator shoes

Aerator shoes, sometimes called spike sandals, strap metal spikes to the bottom of your footwear. Walking the lawn makes shallow holes. They are inexpensive, but the holes are short and widely spaced, the spikes press soil together and walking in them is awkward and tiring. Even a basic rolling spike aerator or hand spike fork does more, and a manual core aerator does far more.

Using a tow-behind spike aerator

1. Attach the aerator to the hitch on your riding mower or lawn tractor, following the manual.
2. Load the weight tray within the specified limit.
3. Drive at a slow, steady speed in straight lines.
4. Raise the spikes or take wide turns to avoid tearing turf.
5. Work across slopes and avoid steep banks.

Spike aeration before overseeding

On loose soil, a spike aerator can be a quick way to prepare for overseeding when you do not have access to a core machine or slit seeder. The holes and loosened surface give seed somewhere to settle.

1. Mow short and bag clippings.
2. Rake out dead grass and debris.
3. Make two or three spike passes in different directions.
4. Spread seed at the rate on the bag.
5. Rake lightly or drag a mat to work seed into the holes.
6. Topdress thinly with compost if you like.
7. Keep the surface moist until germination.

On compacted soil, results will be better with core aeration or a slit seeder. For other ways to get seed into soil, see our guide to overseeding without aerating.

Spike aeration for watering problems

Sometimes the surface of a lawn becomes crusted or water-repellent, especially in hot, dry weather or on sandy soil. Water beads up and runs off instead of soaking in. A pass with a spike aerator can break that crust and help water enter the soil, giving short-term relief. For lasting improvement, combine spiking with compost topdressing, deep watering and, where soil is compacted, core aeration.

How long spike aeration lasts

Spike holes in loose soil close within days to a few weeks as soil settles and grass grows. That is why spike aeration works best as a quick preparation for seeding, feeding or watering rather than as a long-term fix. Core aeration holes, by contrast, leave open channels that let roots and organic matter move deeper, which is why their effects last longer.

Getting better results from a spike aerator

• Spike only moist soil.
• Make several passes to increase hole density.
• Combine with compost topdressing to build soil structure over time.
• Use it for light maintenance between core aerations rather than as a replacement.
• Keep spikes clean and straight; bent spikes tear turf.

Spike aerators on uneven lawns

Bumpy, uneven lawns cause problems for rolling and tow-behind spike aerators. On high spots, the drum rides up and spikes go deep; in dips, the drum may barely touch the soil. A few adjustments help:

• Go slowly so the drum stays in contact with the ground.
• Add weight so spikes reach into low areas.
• Make passes in several directions to catch spots missed on the first pass.
• Use a hand spike fork in dips and hollows the drum skips.
• Level the lawn gradually with thin topdressing after spiking. Spread a sand and compost or soil mix over low spots in layers no more than about half an inch thick, so grass can grow through.

Over a season or two, repeated light topdressing after spiking can smooth minor bumps while improving the soil. Larger dips may need soil added in several stages, and big ruts or mounds may need regrading.

Choosing a spike aerator

If a spike aerator suits your lawn, look for:

• Steel spikes that resist bending.
• A weight tray on rolling and tow-behind models.
• Spike length of a few inches for useful depth.
• A sturdy frame and good wheels for rolling models.
• A transport position that lifts spikes off hard surfaces.
• A universal hitch on tow-behind models that fits your mower or tractor.

Our roundup of the best spike aerator compares push and tow-behind models for homeowners.

Common mistakes with spike aerators

• Using spikes on compacted clay and expecting core aeration results.
• Spiking dry, hard soil, where spikes barely penetrate.
• Spiking soggy soil, which smears and seals holes.
• Making only one quick pass.
• Wearing aerator shoes and expecting meaningful results.
• Turning sharply with spikes engaged and tearing turf.
• Ignoring sprinkler heads hidden in the grass.

Maintaining a spike aerator

After each use, scrape soil off the spikes and drum, rinse and let the tool dry. Check for bent or loose spikes and straighten or replace them. Lightly oil metal parts before storing to prevent rust, and store the aerator indoors or under cover. On tow-behind models, check the hitch pin, wheels and weight tray each season.

When to switch to a core aerator

Switch to core aeration if:

• Water puddles or runs off the lawn.
• A screwdriver is hard to push into moist soil.
• The soil is heavy clay.
• Traffic areas stay thin despite care.
• Thatch is thicker than about half an inch.

You can rent a core aerator for a day or use a manual core tool on small areas. See how to aerate a lawn by hand for manual core options.

University extension services, such as Purdue Extension Turfgrass Science, explain the differences between solid-tine and hollow-tine cultivation.

The bottom line

To use a spike aerator well, spike only moist soil during active growth, add weight to rolling and tow-behind models, make several passes for more holes and follow up with seed, compost or fertilizer. Spike aerators are best for loose soils and light surface opening, while compacted clay, thick thatch and heavy traffic areas need a core aerator.

Frequently Asked Questions