How to Choose a Lawn Mower – UK Buyer’s Guide

The lawn mower market in the UK has changed significantly in the last five years. The rise of powerful cordless battery platforms has made corded electric mowers almost redundant for most gardens, robotic mowers have come down in price to a point where they are a genuine option for many homeowners, and petrol mowers remain the benchmark for large lawn performance. With four distinct power sources and three core cutting types to choose from – plus self-propelled drive, mulching functions, collection or no collection, and cutting widths from 28cm to over 50cm – the choices are more numerous than ever.

The good news is that the right answer for any given garden is almost always obvious once you know the key criteria: lawn size, lawn type, terrain and how much you are willing to spend. This guide works through each decision point in order and gives a clear recommendation at each stage, so you can arrive at the right mower without having to cross-reference dozens of specifications.

Rotary vs cylinder vs hover

Before choosing a power source or brand, the most fundamental decision is the cutting mechanism. The three main types cut grass in entirely different ways and produce different results, which means the right choice depends heavily on what kind of lawn you have and the finish you want.

Rotary mowers use a horizontally spinning blade that cuts grass by impact – essentially chopping it off rather than cutting it cleanly. They handle long, rough or uneven grass well, cope with weeds and damp conditions better than cylinders, and are the dominant type in UK gardens for good reason. The cut finish is good but not fine – for a standard family lawn it is entirely sufficient, but for a formal or ornamental lawn where stripe definition and cutting precision matter, a rotary is not the best tool.

Cylinder mowers use a rotating helical reel of blades that cuts grass between the reel and a fixed bottom blade, like a pair of scissors. This produces a very clean, precise cut that leaves a fine finish and excellent stripe definition. However, cylinders require the grass to be in good condition and reasonably short – they struggle with long or rough grass, choke on weeds, and do not cope well with damp conditions. They are the right choice for a well-maintained ornamental lawn where a fine finish is the priority, but not for a family garden with mixed grass and regular heavy use.

Hover mowers float on a cushion of air above the grass and can be moved in any direction – including sideways – which makes them useful for awkward shapes, steep slopes and grass around obstacles. They are always rotary in their cutting mechanism. Their main limitation is the absence of a rear roller, which means they cannot produce the light-and-dark stripes that many gardeners value, and they are not practical for very large lawns as they must be manually pushed without self-propulsion.

Power source compared

Once the cutting type is decided, the power source determines practicality, runtime, running cost and maintenance burden. The four options each suit different situations and budgets.

Cordless battery mowers are now the right choice for most UK gardens up to around 400-500m². The best models from Greenworks, EGO, Makita and Husqvarna on their 40V-82V platforms deliver power that matches mid-range petrol mowers, with zero maintenance overhead and far lower running costs. Battery runtime is the key consideration – a single 4Ah battery on a 40cm mower will typically cover 200-300m² per charge. For larger lawns, dual battery systems or a second battery eliminate the runtime limitation entirely.

Petrol remains the benchmark for large lawns over 500m², particularly where the terrain is uneven or the grass is allowed to grow long between cuts. The unlimited runtime and raw power of a petrol engine handles conditions that stretch or exceed the limits of battery mowers. The trade-off is higher maintenance – annual servicing, spark plug changes, oil changes and carburettor cleaning – and the running cost of fuel. For most suburban gardens, this overhead is unnecessary.

Corded electric mowers have been largely superseded by cordless for new purchases. The only remaining advantage of a cord is unlimited runtime with no battery cost, but the practicality limitations of managing a cable around a garden outweigh this in most situations. Robotic mowers are a genuine and increasingly affordable option for lawns under 500m² that are relatively simple in shape. They cut little and often, which produces a healthy, even sward without collection, but they require a wire boundary installation and do not cope well with complex shapes, steep slopes or frequent obstacles.

Cutting width and lawn size

Cutting width is the single specification most directly linked to how long a mowing session takes. A wider deck covers more ground per pass and finishes faster, but a wider mower is harder to manoeuvre around obstacles, may not fit through a narrow garden gate, and is heavier. The relationship between cutting width and lawn size is not a hard formula, but general guidance is useful: a 30-33cm deck suits lawns up to 100m², 38-42cm up to 300m², 44-50cm up to 500m², and anything above 50cm for large open lawns over 500m² where a self-propelled model with a wide deck saves significant mowing time.

Self-propulsion is worth considering seriously for any lawn over 200m² or on any site with even moderate gradient. A self-propelled mower drives its rear wheels from the engine or motor, taking the effort of pushing out of the equation and making mowing much less tiring over larger areas. Most self-propelled models offer variable speed control – matching your walking pace to the drive speed makes a significant practical difference on a large lawn. On a small flat garden, self-propulsion adds cost and weight without benefit.

Key features to look for

Beyond the core decisions of type, power and width, several secondary features are worth comparing between specific models. Grass collection versus mulching is the most common trade-off. Collection produces a tidier result and removes clippings that would otherwise compact into thatch over time, but requires regular emptying of the collector box and disposal of the clippings. Mulching mowers finely chop clippings and return them to the lawn as a natural fertiliser – beneficial for soil health but less effective on long or wet grass where clipping buildup can smother the lawn surface.

Height adjustment range determines how versatile the mower is across the seasons. A good range for a UK lawn is 20-80mm, with at least five or six distinct settings. Mowing at 25-30mm in summer and raising to 50-60mm in autumn and winter reduces stress on the grass significantly. Single-lever centralised height adjustment is far more convenient than adjusting each wheel individually – worth specifying on any new purchase.

Matching the mower to your lawn type

The character of your lawn affects which mower type will give the best results as much as the size does. A formal ornamental lawn with fine fescue grass that is mown twice weekly in summer and kept at 20-25mm calls for a cylinder mower with a rear roller – nothing else produces the same quality of cut or stripe at that height. A family lawn with ryegrass that gets heavy use, grows fast in spring and is mown weekly or fortnightly at 35-50mm is perfectly served by a rotary and does not benefit from a cylinder.

A lawn with irregular contours, slopes, long narrow strips or complex shapes around flower beds calls for a mower that is easy to manoeuvre – a hover or a compact rotary rather than a wide-deck self-propelled model that struggles to turn in tight spaces. If the lawn has a significant slope of more than 25 degrees, some cordless rotary mowers become unsafe and a hover mower is the practical choice. Check the manufacturer’s maximum slope specification before purchasing.

Common mistakes to avoid