In everyday language, “what mower” usually means which home lawn mower type fits your yard—not a farm machine or one winning brand. Common types are reel (cylinder) mowers, walk-behind rotary mowers (push or self-propelled), hover mowers, riding mowers or lawn tractors including zero-turn layouts, and robotic mowers. Match type to lawn size and shape, slope, obstacles, grass, storage, power preference, and the time or effort you will accept.

What people usually mean by “what mower”

A consumer lawn mower is a machine that shortens turf grass on a home lawn, shared garden, or similar patch to a chosen height. It is not a combine, a brush cutter for scrub, or a tractor-mounted field implement. When someone types a bare question such as “what mower,” they are almost always trying to name a category that will work on ordinary turf, not to crown a single product.

That reading is the usual one because most people who ask the question have a house lawn, a small enclosed garden, or a suburban plot. They want to know whether they need a walk-behind mower, a riding machine, a hover mower, a reel mower, or a robotic mower—and which power source belongs with that body style. Commercial turf machines and farm cutters exist, and they matter if you manage sports pitches, estates, or agricultural grass. They sit outside this article. So do brand lists, model names, and any claim that one machine is the winner.

What this article will decide is the match: which type tends to suit which lawn and which user. What it will not name is a recommended product, a price band, or a “best overall” label. If two types both fit, the tie-breakers are storage, noise, physical effort, collection, and how you like to work—not a ranking.

The main types of lawn mowers

Home machines share a job—cut grass to a set height—but they differ in cutting action, how you move them, and how much of the work is left unattended. Recognising the layout is more useful than memorising marketing names.

Reel or cylinder mowers

A reel mower, also called a cylinder mower, cuts with a spinning reel of helical blades that shear grass against a fixed bedknife. The action is scissor-like. When the reel is sharp, correctly set to the bedknife, and used on grass that is already in a sensible height range, many gardeners associate it with a clean leaf tip and, on some lawns, a formal striped look. It is not a speed tool for neglected, long, or very coarse utility grass. Manual reel mowers have no engine; powered cylinder machines exist for people who want the same cut with less physical push.

Rotary walk-behind mowers: push and self-propelled

A rotary mower cuts with a horizontally spinning blade under a mower deck. Most household walk-behind mowers are this type. A push mower asks you to supply most of the forward force while the engine or motor only spins the blade. A self-propelled mower drives the wheels so you mainly guide, turn, and control speed. Both still require you to walk the lawn, manage edges, empty a collector if you use one, and watch for obstacles. The same deck may offer mulching, grass collection, side discharge, or a combination, depending on the design—not on the brand name.

Hover mowers

A hover mower is typically a walk-behind rotary cutter that rides on a cushion of air instead of rolling on a conventional wheeled chassis. The layout is common on compact or awkwardly shaped gardens, including banks that are awkward for a wheeled deck, because the machine can be swung or slid rather than steered like a cart. The trade-off is usually weaker collection, less stability of cut height on very uneven ground, and more struggle in long, wet, or thick grass. Hovering does not make the blade safer; the cutter is still a spinning rotary blade.

Riding mowers, lawn tractors, and zero-turn layouts

A riding mower or lawn tractor carries the operator. You sit, steer, and cover open ground faster than you would on foot, provided the lawn is large enough and open enough for the machine to turn and for you to store it. A lawn tractor is often thought of as a rider that can also pull simple garden attachments; in practice, both names describe sit-on rotary mowers for larger home lawns. A zero-turn mower is still a riding layout. It steers through independently driven drive wheels and typically turns in a very tight pattern, which helps around trees and island beds on a big open plot. Tight gates, steep banks, and tiny sheds still rule many riders out, including zero-turn machines.

Robotic mowers

A robotic mower works unattended or with light supervision inside a bounded lawn, then returns to a charging base when the design includes one. The boundary may be a physical wire, a mapped wireless system, or another method depending on the design; no single boundary technology is universal. Robots usually take frequent light cuts rather than one heavy weekly pass. They still need a reasonably tidy, reasonably short starting lawn, a plan for edges and obstacles, and a clear working area. They are a time trade—setup and layout work in exchange for fewer walking sessions—not a complete substitute for every other type.

Jobs overlap. A self-propelled walk-behind and a small rider can both finish a medium suburban lawn. A hover mower and a compact rotary can both handle a small enclosed garden. A reel mower and a well-set rotary can both produce an acceptable utility finish if you mow often. Overlap is normal; it is why criteria matter more than a league table.

Power sources: manual, petrol, corded electric, and battery

Body style is the first axis. Power is the second. The same walk-behind rotary deck can be petrol, corded electric, or battery-powered. Reel mowers can be manual or powered. Riders and many robots have their own power constraints. Compare them qualitatively, not as a spec sheet.

Manual reel mowers

A manual reel mower asks for user strength, a fairly short grass length, and frequent mowing. There is no engine noise, no fuel, and no charge cycle. There is also no spare power when the lawn has grown long, the ground is soft, or the reel is dull or poorly adjusted. It suits people who already keep a compact lawn short and who want a fine shearing cut more than they want speed.

Petrol mowers

A petrol mower is not limited by a cord or by a charge cycle in the same way as an electric machine. That independence is why petrol remains common on larger walk-behinds and on most sit-on machines. The cost of that independence is mechanical upkeep: fuel, oil where the engine design requires it, spark, air filtration, and careful storage. Petrol machines are typically noisier and produce exhaust. Local noise, emissions, or equipment rules can make a petrol choice impractical even when the lawn size would suit it. Those rules are not the same everywhere, so check what applies where you live rather than assuming a global ban or a global free pass.

Corded electric mowers

A corded electric mower needs a suitable outdoor power setup and a lead long enough to cover the lawn without being cut, snagged, or stretched across wet hazards. The cord becomes a problem as soon as the plot has many beds, trees, tight corners, or a layout that forces you to keep swapping sockets. Wet-use caution matters: follow the machine’s instructions and do not treat an outdoor socket as a reason to ignore water, damaged cables, or worn connectors. Corded machines avoid fuel and charging downtime, but they trade that for a physical tether.

Battery-powered mowers

A battery-powered mower is limited by charge and by workload. Thick, wet, or overgrown grass draws more from the pack than a dry, regularly cut lawn. Runtime is not a fixed number you can treat as a universal rating, because grass, height of cut, collection, and walking speed all change the demand. In ordinary use these machines are typically quieter and need less day-to-day engine maintenance than comparable petrol mowers. You still need a charging routine, spare capacity if the lawn is large, and safe storage for the pack. Damaged batteries and wet electrical connections are hazards, not minor inconveniences.

Neighbours, shared walls, and evening mowing habits can matter as much as the lawn. A quieter electric or a robot on a daytime schedule may be easier to live with than a petrol machine even when petrol would finish the job faster. That is a household and local-rules decision, not a performance trophy.

Lawn and user factors that actually decide the type

Type choice depends on the plot and on the person, not on a single “correct” class. Use qualitative size language—compact enclosed garden, medium suburban lawn, large open expanse—rather than a hard area cutoff. Access, shape, and obstacles often matter more than the total patch of green.

Size, shape, and obstacles

A compact enclosed garden with furniture, borders, and a narrow gate favours a walk-behind rotary, a hover mower, or a manual reel if the grass is kept short. A medium suburban lawn with a few trees can still be a walk-behind job, especially if the mower is self-propelled. A large open expanse starts to reward a riding mower or zero-turn layout because walking time, not cutting theory, becomes the burden. Obstacles change the picture: island beds, play equipment, tight paths, and frequent furniture force more reversing and lifting than a simple rectangle of the same area.

Slope, roughness, and wet or uneven ground

Steep slopes are a safety and traction limit for riders and for many robots. Sudden turns, wet turf, and side-on travel raise the chance of a tip or a slide. Walk-behind machines still need secure footing; a hover mower can be easier to move on some banks and harder to control if the cushion of air lets the deck drift. There is no single maximum angle that applies to every machine. Follow the manufacturer’s slope guidance for the type you use, and treat wet grass, gravel, and hidden objects as reasons to change method or delay the job rather than as a test of the machine.

Rough, rutted, or thatchy ground is harder for hover mowers, many robots, and underpowered electrics. That is a tendency, not a laboratory ranking. Long wet grass packs a deck, smears rather than cuts, and can stall a reel. If the lawn is often left until it is shaggy, choose a type with enough power and a deck that can handle a heavier first pass—or change the mowing habit before you change the machine class.

Grass, finish, and how often you will mow

A utility lawn that is allowed to grow between weekend sessions behaves differently from ornamental turf that is cut little and often. Reel and cylinder machines reward the second habit. Rotary walk-behinds and riders tolerate a wider range of lengths, but they still tear if the blade is dull or the grass is far too long. Desired finish matters: a formal front garden may justify a reel; a back lawn used for play may justify a rotary that collects or mulches quickly. Grass thickness and seasonal flush also matter. Spring growth can overwhelm a machine that felt adequate in midsummer.

Storage, access, and transport

A riding machine that cannot pass the side gate or sit in the shed is the wrong type, however open the lawn looks from the kitchen window. Stairs, shared hallways, and the need to lift a deck into a car constrain walk-behinds as well. Compact hover and some folding-handle walk-behinds exist because storage is part of the job. If you cannot store fuel, a charging base, or a large deck securely, that constraint should knock types off the list before you think about cut quality.

Time, physical ability, household safety, and budget

Time and physical effort are valid selection factors. Pushing a heavy rotary on a large lawn is exhausting. Balancing on a slope with a hover mower is tiring in a different way. Hearing, grip, and the ability to handle fuel or batteries all belong in the decision. Children, pets, and neighbours belong in it too: a robotic mower still needs a clear working area; a rider still throws debris; any spinning blade is a reason to keep bystanders away.

Budget is a constraint on features and power, not a reason to name a winning model. Money may decide whether you can have self-propel, a larger battery, or a sit-on machine at all. It does not create a universal “best buy.” If two types both fit the lawn, spend the budget conversation on storage, noise, collection, and how much work you want to do—not on an invented value band.

How to match a mower type to typical conditions

Use overlapping “usually suits / usually struggles” guidance. No type is required by a magic lawn size, and none is forbidden by a single tree in the middle of the grass.

  • Small, fairly flat garden, tight storage: A walk-behind rotary or a hover mower usually fits. A manual reel mower can fit if you will keep the grass short and want a fine shearing cut. Riders usually struggle with gates, turning, and the shed.
  • Medium lawn, some slopes or longer sessions: A self-propelled walk-behind is often a better fit than a basic push mower because the machine supplies forward force and you mainly guide. Push still works if the plot is compact, the mower is light enough, and you want the exercise.
  • Awkward banks, light unevenness, little interest in collecting: A hover mower can help you move the cutter without wrestling wheels. It usually frustrates people who want tidy bagging, a very even height on ruts, or a first cut after a long holiday.
  • Large open expanse, storage and access available, moderate slope: A riding mower, lawn tractor, or zero-turn layout starts to make sense as a time-saver. The lawn is too tight or too steep when you cannot turn without damaging beds, cannot store the machine, or the slope exceeds what the manufacturer treats as safe for a sit-on deck.
  • Hands-off preference on a bounded, regularly cut lawn: A robotic mower is a time trade. You invest in layout, boundary work, and obstacle management, then accept frequent light cuts. It is not a complete substitute after the grass has grown long, on very steep ground, or where edges and wild corners still need a walk-behind or trimmer.
  • Formal or frequently cut fine turf: A reel or cylinder mower can be chosen for finish rather than speed, provided you will mow often and keep height in range. Rough utility grass usually struggles with a reel.

If two types both fit, break the tie with storage, noise, physical effort, and collection needs. Do not invent a “best overall” label. A self-propelled rotary and a robot can both serve the same suburban rectangle; one asks you to walk and empty a box, the other asks you to set a boundary and still tidy the edges. Choose the work you would rather do.

Cut quality, collection, and how you manage clippings

How the machine handles clippings is part of choosing a type, not a feature scorecard. The three common paths are mulching, collecting, and side-discharging. None of them is automatically healthier for every lawn.

  • Mulching finely recuts clippings and drops them back into the sward. It avoids emptying a bag, but it works better when you cut often and the grass is not soaked or overgrown.
  • Grass collection lifts clippings into a bag or box. It leaves a tidier surface and removes material you do not want on paths or in play areas. It also means stopping to empty the collector, and a full box changes how the mower behaves.
  • Side discharge ejects clippings in a stream. It is quick on open ground and can leave clumps or windrows in thick grass. It is a poor neighbour to flower beds if the stream is aimed at them.

A reel mower often leaves a different finish from a rotary mower because the cut is a shear against a bedknife rather than an impact from a horizontal blade. When the reel is sharp and adjusted, many gardeners see a cleaner leaf tip. A rotary can tear if the blade is dull, the deck is packed, or the grass is far too long. That is typical mechanics, not a lab contest. Either type can look poor if you skip maintenance.

Cutting height and mowing frequency interact with type. A common rule of thumb is to take a little at a time rather than scalping a tall lawn in one pass; treat that as practice, not a measured law. Robots are built around frequent light cuts. Reel mowers also prefer grass that never gets far out of range. Rotary walk-behinds and riders can take a heavier session, but the finish and the health of the leaf usually suffer when you wait too long. Dull blades and a packed deck change results more than any brochure claim about a type. Sharpen or replace rotary blades as the manufacturer directs, keep the underside of the deck clear, and set reel-to-bedknife clearance with care rather than forcing a blunt cylinder through the lawn.

Spinning blades throw stones, wire, and toys. Feet and hands belong away from the deck, including when you clear a clog. Never reach under a running machine, and do not bypass blade-stop, seat, or lift interlocks. Riding machines can tip on slopes or with sudden turns. Walk-behinds and hover mowers can pull you off balance on wet banks. Robotic mowers still have a cutter and still need a clear area; they are not toys, and children and pets should stay out of the working zone while they run.

Slopes, wet grass, gravel, and hidden objects are type-selection issues as well as day-of-use issues. If the plot is steep, a sit-on machine may be the wrong class even if the area is large. If the lawn is full of decorative stone, any rotary deck becomes a debris thrower. If you cannot see the whole robot path from the house, you still need a plan so people do not walk into it.

Think about fuel, exhaust, and batteries at a high level. Petrol is flammable and should be stored and handled as the fuel container and the mower manual describe. Exhaust belongs outdoors, away from windows and enclosed spaces. Batteries should be charged and stored as the manufacturer directs; damaged packs and wet connections are hazards. Do not invent slope-degree limits, injury statistics, or city-by-city petrol bans from this article. Follow the machine’s slope, charging, and maintenance guidance, and check local noise, emissions, and waste-fuel rules before you buy or use a type.

Store the machine so blades cannot be reached casually and so fuel or batteries stay secure. Keep the user manual with the machine. If a repair involves the fuel system, high-voltage battery pack, or a damaged safety interlock, use a qualified technician rather than improvising. The goal is a type you can use as designed, not a type you have to defeat.

If the current mower is a poor match

Sometimes the question “what mower” is really “why is this one so miserable?” Mismatches show up as symptoms, not as a failed brand.

  • Exhausting walk-behind sessions on a large open lawn suggest the plot may have outgrown a pedestrian machine, or that self-propel would remove the worst of the push.
  • A rider that cannot turn in a small garden, scrape through the gate, or fit in the shed is the wrong body style, not a machine that needs more accessories.
  • A hover mower or robot that smears and stalls after a holiday usually met grass that was too long or too wet for that layout.
  • A reel mower that stalls or tears in rough utility grass is being asked for a rotary job.
  • A corded mower that spends half the session untangling the lead is fighting the layout, not the grass species.

Try habits before you change category. Raise the cutting height for a recovery cut, mow more often so you never face a hayfield, clear sticks and toys, sharpen or replace the blade, and clean a packed deck. Many “the mower is useless” complaints are dull steel and delayed mowing. If the lawn is simply too large, too tight, too steep, or too broken up for the current type, step up or down a class using the matching criteria above. Adding a bigger bag or a striping roller will not fix a rider in a courtyard or a manual reel in knee-high grass.

What you should still avoid deciding from this article alone is a brand, a promised time saving, or a claim that one type will never scalp, clog, or fail. Read the manual for any machine you already own. Measure gates and shed openings before you move to a rider. Walk the slopes and note wet spots. If the lawn is a shared space or sits under local equipment rules, check those rules. The useful answer to “what mower” is a category that fits the ground you have and the work you will actually do.