Why Your Lawn Matters More Than You Think

A lawn is not just a green carpet. To a bumblebee, a hoverfly, a hedgehog or a bat, it can be a larder, a highway and a nursery rolled into one. Even a modest patch of grass in a suburban back garden contributes to a network of habitats that runs along hedgerows, railway cuttings and churchyards. The trouble is that the traditional British lawn — closely mown, weed-free and uniformly green — offers very little to wildlife. It is essentially a desert with a nice stripe pattern.

The good news is that you do not need to surrender your lawn to brambles or let it grow into a meadow the size of a small field. A few deliberate choices, made with a bit of patience, will turn your grass into a genuinely useful habitat while still leaving space for a deckchair and a game of badminton.

Start by Letting Some Grass Grow Longer

The single most effective change you can make is to stop cutting every part of the lawn to the same short height. Longer grass — roughly 10 to 15 centimetres — shelters insects, holds moisture at the soil surface, and provides cover for small mammals such as shrews and voles. It also allows wildflowers to flower and set seed.

You do not have to sacrifice the whole lawn. Try one of these approaches:

• Leave a strip about a metre wide along the base of a hedge or fence, and mow the rest as usual.
• Choose a circular or rectangular patch in a corner, perhaps around a tree or shrub, and mark it out with a few stones or a light edging.
• If you have a small garden, simply raise the cutting height on your mower by one or two settings and mow less often.

Aim to cut the long areas just once or twice a year, in late summer or early autumn, and remove the clippings so the grass does not become smothered. If you can, mow in a mosaic pattern — leaving some areas long each year and rotating which ones — because this creates a mix of heights and structures that suits many more species.

Let the Daisies Flower — and Welcome the Clover

Daisies, dandelions, buttercups, selfheal and white clover are not weeds. They are some of the best-value plants in a British garden, and they cost nothing. A patch of flowering daisies will draw in solitary bees, hoverflies and beetles through spring and early summer, while dandelions are among the first nectar sources available to queen bumblebees emerging from hibernation in March.

White clover deserves a special mention. Its flowers feed bees and butterflies, and its roots fix nitrogen, which gradually improves the soil beneath your lawn. If you can tolerate a lawn that looks a little more flower-rich, you will be rewarded with far more insect activity — and, in turn, more birds. Sparrows, starlings and goldfinches will happily pick over a seed-rich lawn.

If you want to give wildflowers a helping hand, scatter a little yellow rattle seed into longer grass in autumn. It is a semi-parasitic plant that weakens vigorous grasses, opening up space for other flowers without any chemical intervention.

Avoid Pesticides and Weedkillers Entirely

This is the most important rule. Weed-and-feed products, moss killers and insecticides do not discriminate between the species you dislike and the species you want. A single application of lawn insecticide can wipe out the leatherjackets, worms and beetles that feed blackbirds, hedgehogs and bats for months afterwards. Slug pellets based on metaldehyde are particularly damaging, as they are lethal to hedgehogs and birds that eat the poisoned slugs.

Instead of reaching for chemicals, deal with problems by changing conditions:

• Moss usually means shade, compaction or poor drainage. Spike the lawn in autumn, brush in some sharp sand and thin out overhanging branches.
• Dandelions and plantain can be lifted with a hand fork after rain, when the soil is soft. Leave a few behind for the bees.
• Leatherjackets and chafer grubs can be managed by encouraging natural predators — birds, hedgehogs and ground beetles — rather than treating the soil.
• Fertiliser is rarely necessary. A light top-dressing of homemade compost in spring is gentler and supports soil life.

Keep the Edges Wild and the Mower Quiet

Wildlife-friendly mowing is as much about timing as height. Try not to cut everything on the same day, as this removes all cover at once and leaves insects and small mammals exposed. Leaving a fringe of longer grass around the edge of the lawn, beneath shrubs and along walls, gives amphibians, beetles and voles a safe corridor to move along.

Consider mowing in the late afternoon or evening, when bees and butterflies have finished foraging, and check the grass for hedgehogs and frogs before you start. If you can, use a push mower or a battery-powered machine; the noise and fumes of a petrol mower disturb far more than just your neighbours. Raking up clippings by hand is slower, but it gives you a chance to spot the small creatures living in your grass.

Small Changes, Real Results

You do not need a wildflower meadow or a field to make a difference. A slightly shaggier lawn, a patch of daisies left to flower, and a firm decision to put the weedkiller back on the shelf will between them support more insects, birds and mammals than a perfectly striped green sward ever could. Start with one corner this spring, watch what arrives, and let the garden tell you what it wants to become. British wildlife is remarkably quick to respond when we simply stop getting in its way.