Best lawn roller

A lawn roller is the simplest machine in the catalog: a drum you fill with water and drag. The only real decision is how much weight, and it matters more than the simplicity suggests — too little does nothing, and too much compacts the soil you were trying to improve.

The short answer

Load per inch of drum is the comparable figure

Total weight is the headline; what the turf feels is weight spread across the drum. Both of these are 48 in wide, which makes the comparison clean.

The contact patch is narrower than the drum, so the actual pressure at the turf is higher than these figures — but as a like-for-like comparison between two 48 in drums it is exact, and the 1.65x ratio is the number to decide on.

The two, on published figures

1. Agri-Fab 18 in x 48 in poly (45-0604) — the seeding roller

Fifty-six pounds empty, 550 filled, and a drain-and-fill plug that takes a garden hose. That last detail is the one that decides how often the roller actually gets used: a roller you can empty in the spot where you finished and stand on end in the garage is a roller that comes out again next year.

At 11.5 lb per linear inch it presses seed into soil without driving the air out of the top few inches. That is exactly the job after overseeding — see how to overseed.

Poly will not rust if it is stored with water left in it by accident, which is the most common way a steel drum dies. Against it: poly scuffs, and it can crack on a hard stone edge where steel would dent. And Agri-Fab publishes no gallon capacity, so there is no way to estimate fill time.

#ad Check the Agri-Fab 18" x 48" Poly Tow-Behind Lawn Roller (45-0604) price on Amazon — how we're funded.

2. Agri-Fab 24 in x 48 in steel (45-0216) — the levelling roller

Nine hundred and ten pounds filled is the heaviest in our registry, and 360 lb more than the poly drum. That is what levelling frost heave on an established lawn actually needs.

The scraper detail is genuinely good engineering: the hitch tubes are positioned to scrape the drum, so wet soil does not build up and get carried round. A drum caked in clay stops rolling flat and starts printing a pattern into the lawn.

The 24 in drum also bridges small stones rather than pressing them into the turf, which the smaller 18 in drum is more likely to do.

Against it: 114 lb empty is a two-person lift, steel rusts if it is stored wet, and at 19.0 lb per linear inch this is the wrong tool on clay soil where compaction is already the problem.

#ad Check the Agri-Fab 24" x 48" Steel Tow-Behind Lawn Roller (45-0216) price on Amazon — how we're funded.

When to roll, and when not to

• Roll after seeding or sodding. Seed needs soil contact, and a light roller gives it.
• Roll in spring after a hard freeze-thaw cycle, once, on a lawn that has visibly heaved.
• Do not roll wet clay. That is compaction, not levelling, and it takes an aerator and a season to undo.
• Do not roll to fix ruts or low spots. Those need topdressing and seed, not pressure.

What we cannot tell you

We have not towed either roller. Agri-Fab publishes no gallon capacity for either drum, so fill time is unknown; no hitch type, so compatibility with a particular tractor is unconfirmed; and no warranty term. Nobody publishes a soil-pressure limit for turf, so the load-per-inch figures above compare these two rollers with each other and nothing more.