Why a strip of lawn is worth more than the whole lawn

A closely cropped lawn is, from a bird's point of view, a green desert. There is nothing to hide in, no seed to pick over and very little to eat. When you let a patch of grass grow long through spring and early summer, you are not simply "not mowing" — you are handing over a small strip of your garden to the insects that feed the birds.

The difference is startling. Longer grass, with its shelter and its flowering herbs, supports a far greater weight and variety of invertebrates than a mown sward: beetles, bugs, moths, hoverflies, spiders and the caterpillars that most garden birds need in spring. A pair of blue tits feeding chicks can bring in hundreds of caterpillars a day, and they will not find them on a manicured lawn. Add seed heads in late summer and you have food for finches and sparrows as well.

You do not need a field. A strip one metre wide and five metres long is a genuine improvement, and half a dozen such strips around a street add up to something much bigger.

Pick your strip and put the mower away

Choose ground that is easy to leave alone: along a fence, beside a shed, behind a border, or the awkward corner where the mower never quite fits. A sunny spot will flower best, but even a north-facing strip will be worth doing.

Then stop mowing it from around late March or early April, and let it grow until midsummer. If you are nervous about how it will look, start with a smaller patch than you think you want, and enlarge it next year.

• No feeding. Do not add fertiliser, compost or weedkiller to the strip. Rich soil grows rank grass and few flowers; poor soil is exactly what wildflowers want.
• No cutting back the edges. If you have an edge, keep it crisp — see below — but leave the middle alone.
• Tell the neighbours. A brief note about the birds and the bees saves months of sideways looks, and a tidy mown edge does most of the persuading for you.

Mow paths for structure and access

Long grass does not have to mean an abandoned garden. The trick that makes the whole thing work, both visually and practically, is to mow paths through it. A path tells the eye that the meadow is deliberate, lets you walk to the bird feeder without soaked trousers, and creates the sunny, open edges that butterflies and basking insects love.

Keep the path 60–75cm wide — enough for a wheelbarrow or two people side by side — and cut it every two to three weeks to about 5cm. Run it in a gentle curve rather than a straight line, and consider a small circle of short grass in the middle of the meadow, with a bench or a bird bath on it. This is the part that makes the strip feel designed rather than neglected, and it is also where you will do most of your wildlife watching.

Mow the outer boundary too, as a narrow collar of short grass. That collar is what stops the meadow from looking like a mistake.

Encourage the flowers that feed birds

Have a look at what is already there before you spend anything. Most UK lawns already hide selfheal, yarrow, daisies, buttercups, plantain and speedwell, and these will come up willingly once the mower stops. Give the strip one full season to show you what it can do.

If coarse grasses dominate, sow yellow rattle in autumn. It is a native annual that taps into grass roots and weakens them, which is the single most effective thing you can do to let flowers through. Sow it thinly on ground you have scratched open, and let it set seed before you cut.

If you want to add plants, choose native wildflowers suited to your soil rather than a general-purpose mix. Good, reliable choices include oxeye daisy, common knapweed, bird's-foot trefoil, red clover, field scabious, meadow buttercup and yarrow. Avoid annual cornfield mixes unless you want a brief, expensive show that vanishes after one summer.

Leave the seed heads standing as long as you can. Teasels, knapweed and scabious are goldfinch magnets in late summer and autumn.

The cut that makes the difference

Knowing when and how to cut is what separates a meadow from a scruffy patch. The rule is simple: let the flowers flower and set seed, then cut.

• Main cut, late July to mid-August. Cut the whole strip to about 5cm. Leave the cuttings lying for two or three days so any remaining seed drops, then rake them off and remove them. Taking the hay away is vital — leaving it enriches the soil and the grass will win next year.
• Tidy cut, late September or October. A second cut to 5cm keeps the strip manageable over winter and stops it smothering itself.
• Stagger it. Never cut the entire meadow on the same day. Leave a third of it standing until late April so overwintering insects and seed-eating birds have somewhere to be, then cut and rake that section.

If you have only one strip, cut half in late summer and leave the other half until spring, swapping over each year.

A few finishing touches, and what to expect

Before you start any mower or strimmer, walk the long grass first. Hedgehogs, frogs, slow-worms and ground-nesting birds all use it, and a quick check in the afternoon, when the grass is dry, prevents most accidents. Cut from the middle outwards or from one side, so anything hiding has a route to escape.

• Pile your raked hay, plus a few logs, in a quiet corner as a habitat stack.
• Put out a shallow dish of water with a few stones in it as a landing pad.
• Leave a patch of bare soil or short grass nearby for birds to dust-bathe and hunt.

Give it a season and the change is remarkable. Starlings and blackbirds will work the longer grass for leatherjackets and beetles. Dunnocks, wrens and robins will slip through the stems. Goldfinches and greenfinches will drop in for seeds, and house sparrows will gather in noisy little flocks. Above it, if you are lucky, you may get a passing meadow brown or a ringlet. All from a strip you simply stopped mowing.