Your garden is small. Your grass still grows. And now you are standing in the garden centre staring at a wall of mowers — petrol, electric, cordless, manual, robotic — wondering whether a tiny lawn justifies any of this, and whether you should buy now or wait. It is a more consequential decision than it looks: the wrong mower for a small garden is either expensive overkill or a weekly exercise in frustration.
This guide answers the timing question and the buying question together: when to buy, which type suits small gardens, what to spend, and the mistakes London gardeners in particular should avoid.
Now or later? The timing answer
Buy in late winter or very early spring — February to March — for the best combination of price and readiness. Retailers discount previous-year models to clear stock before the new season, and you will have the mower serviced, charged and ready for the first cut (usually late March in London). Buying at the peak of summer means paying full price for a machine you needed two months ago.
The one exception: if your lawn is currently a meadow and it is already June, buy now anyway. A season of struggling with shears or borrowing a neighbour’s mower costs more in frustration than any discount saves. And if you are only planning a lawn from scratch — seed or turf not yet down — wait until the project starts; buy the mower when the grass arrives, not before.
Which type suits a small garden?
Cordless electric: the default choice
For most small London gardens, a cordless (battery) mower is the sweet spot. No cable to mangle, no petrol to store, quiet enough not to annoy neighbours, and modern 36V systems cut surprisingly well. A 33–38cm cutting width suits lawns up to about 200 square metres. One battery usually covers a small lawn per charge; buy a model whose batteries fit the brand’s other garden tools and you have started a very economical ecosystem.
Manual reel mowers: the quiet purist’s option
For truly tiny lawns (under 50 square metres), a push reel mower is brilliant: silent, £60–£100, no charging, no fuel, and it gives the cleanest cut of all — reel blades scissor grass like scissors rather than tearing it. The catch: it struggles with long or damp grass, so you must mow little and often. If you will genuinely mow weekly, it is the most satisfying option.
Corded electric: cheap but annoying
The cheapest powered option (£80–£130), but the cable is a genuine nuisance in small gardens full of beds, pots and furniture to navigate around. Fine if your lawn is one simple rectangle near a socket; maddening otherwise.
Petrol: overkill for small gardens
Do not buy petrol for a small urban lawn. Heavier, noisier, smellier, needs servicing and fuel storage — every disadvantage and no advantage at this scale. Petrol makes sense from about 500 square metres upward.
Robot mowers: the luxury option
Robot mowers now start around £400 and are genuinely excellent for small, simple lawns — they mow a little every day, which is actually the ideal cutting regime. The catch is complexity: intricate beds, narrow passages and steep slopes confuse them. For a straightforward rectangle of lawn, they are wonderful; for a cottage-garden maze, they are not.
What to spend
Realistic budgets: £60–£100 for a reel mower; £150–£250 for a good cordless mower with battery and charger included; £400+ for a robot. Below £150 in cordless, you get small batteries and flimsy build — the false economy zone where the mower dies just as you depend on it. Which? lawn mower reviews test cutting performance independently rather than trusting marketing claims; the RHS lawn advice pages cover mowing technique for healthier grass.
Key specs that actually matter: cutting width (match to lawn size — wider is faster but heavier), cutting height range (look for 20–60mm+ adjustment), battery amp-hours (4Ah minimum for real lawns), and weight (you will be lifting it over steps and into sheds).
London-specific considerations
Storage is the capital’s great mower challenge — measure your shed, balcony box or under-stairs space before buying, and favour models with folding handles and vertical storage. Noise matters more with close neighbours: cordless and reel mowers keep the peace in a way petrol never will. And check your tenancy agreement if you rent — some London landlords prohibit petrol storage but are fine with battery tools. If you are investing more broadly in the garden, our breakdown of what small garden landscaping costs helps budget the whole project, while making a garden more private without high fences solves the overlooked-neighbours problem many London gardeners face.
Mowing technique: it matters more than the mower
An expensive mower used badly gives worse results than a cheap one used well. The fundamentals: mow little and often rather than scalping occasionally — removing more than a third of the blade shocks the grass. Vary your direction each cut to prevent the grass developing a grain. Keep blades sharp — a blunt blade tears grass, leaving brown tips vulnerable to disease; sharpen or replace rotary blades annually. Do not mow wet grass if you can avoid it: it clumps, clogs the deck and tears rather than cuts. And in heatwaves, raise the cutting height — longer grass shades its own roots and survives drought far better than a scalped lawn.
Conclusion
For a small garden, buy a cordless mower (or a reel mower for tiny lawns), buy it in late winter for the best price, and do not overthink it — the mid-range of a reputable brand will serve you for a decade. Learn the one-third rule, keep the blade sharp, and mow little and often rather than in occasional heroic sessions. The best mower is the one that makes mowing feel like ten easy minutes rather than a dreaded chore, because a mower you enjoy using is a lawn that actually gets cut.
Frequently Asked Questions
What size mower do I need for a small garden?
A 32–38cm cutting width handles lawns up to about 200 square metres comfortably. Wider decks cut faster but are heavier and harder to manoeuvre around beds — for intricate small gardens, narrower is often better.
Are cordless mowers powerful enough?
Modern 36V+ cordless mowers cut normal grass as well as corded equivalents. They struggle only with very long, wet grass — the solution is mowing regularly rather than buying more power. Keep the blade sharp and the difference vanishes.
How often should I mow a small lawn?
Weekly in the growing season (April–October), less often in spring and autumn. The one-third rule: never cut more than a third of the grass height at once — it stresses the lawn and invites weeds.
Is a robot mower worth it for a small garden?
For a simple, open lawn — yes, they are excellent and getting cheaper. For gardens with complex beds, narrow gaps, or lots of obstacles, the setup fiddling outweighs the convenience. Map your garden honestly before buying.
Should I mulch or collect clippings?
For small lawns, mulching (leaving fine clippings) returns nutrients and moisture to the soil and saves emptying the box every ten minutes. It works well if you mow regularly; collect clippings when the grass is long or damp to avoid thatch.
