Do Tow Behind Plug Aerators Work? | What 6,000 Lawns Taught Us

Towing a plug aerator behind a riding mower can relieve soil compaction on large lawns, but only when used on moist soil with 100–200 pounds of added ballast and multiple overlapping passes.

A single pass with a dry, lightweight aerator on hard soil does almost nothing. The difference between success and a wasted afternoon comes down to three factors: soil moisture, machine weight, and operator patience. For homeowners who already own a riding mower or lawn tractor, a tow-behind plug aerator is the most cost-effective way to handle a 1–3 acre lawn without renting a machine. Here is what determines whether it works on yours.

How Tow-Behind Plug Aerators Pull Actual Cores

The critical difference is whether the tines are hollow. A plug aerator’s hollow spoons cut into the soil and lift out a 2- to 3-inch core, leaving a hole that relieves compaction and lets air, water, and fertilizer reach grassroots. Spike aerators, by contrast, simply punch holes and can actually compact the surrounding soil further. Tow-behind units attach to a standard hitch on a riding mower, garden tractor, or ATV. Most models weigh 80–150 pounds empty, which is rarely enough—effective operation usually requires adding 100–200 pounds of ballast in the form of weight plates, sandbags, or water-filled drums. On clay-heavy lawns or dry ground, more ballast and slower towing are needed.

Hole spacing on most residential models falls between 2 and 4 inches apart. The shallower the core, the closer the manufacturer recommends spacing, so follow the model-specific guide.

The Three Conditions That Must Be Right

Soil moisture comes first. Water the lawn thoroughly the day before. The soil should hold together in a crumbly ball when squeezed—dry ground shatters cores, and muddy ground clogs the tines. Ballast is non-negotiable. Without 100–200 extra pounds, the tines bounce across the surface rather than cutting in; users who skip this step consistently report poor results. Slow, overlapping passes make the difference. Drive at the mower’s lowest ground speed, and make at least two passes in perpendicular directions on heavily compacted areas. The plugs themselves can stay on the lawn—they break down naturally in one to two weeks, returning organic matter and nutrients to the soil.

When It Falls Short—and What to Do Instead

Tow-behind plug aerators hit a clear limit on dense clay or severely compacted ground. The tow vehicle’s weight simply cannot generate the downward force that a powered walk-behind or ride-on aerator provides. For lawns with heavy clay soil or compaction that has built up over years, a rental core aerator or professional service may be the better choice. Another weakness: turning too tightly on a large lawn strains the mower’s drivetrain and can destabilize the combined weight of the aerator plus ballast. Always check the mower’s towing capacity in the owner’s manual before adding a full 200 pounds of ballast on sloped terrain.

Timing also matters. Aerate when the grass is actively growing—cool-season grasses in early spring or fall, warm-season varieties from mid-spring to early summer—and when the soil is naturally moist from recent rain. Aerating during drought or dormancy stresses the lawn and produces shallow, broken cores.

Setting Up and Running It Right

Before the first pass, mark every sprinkler head, valve box, and buried utility line. The tines are sharp and can cause significant damage. Assemble the unit on a flat surface; the tine spoons are sharp during installation. Attach to the mower’s hitch pin, lift the aerator’s transport wheels (if equipped), and lower the tines into the soil at the start of the run. Drive straight at the lowest gear, let the machine pull the aerator rather than forcing it, and end each row with a wide gradual turn.

If you’re ready to buy, our tested roundup of the best tow-behind lawn aerators breaks down weight capacity, tine depth, and ballast options for each model. Success comes from choosing the right unit for your soil type and towing capacity—and then adding enough weight to make it cut.