Planting a Native Hedge for Small Garden Birds

Why a Native Hedge Beats a Fence

A panel fence gives you privacy and very little else. A hedge of hawthorn, blackthorn and holly gives you privacy plus a larder, a nursery and a windbreak. Small garden birds need three things that native hedging supplies better than almost anything else you can plant: dense thorny cover for nesting, a steady supply of insects through spring and summer for hungry chicks, and berries and haws to see them through the coldest weeks of the year.

A mixed native hedge in a garden only six or seven metres long can comfortably hold two or three nesting pairs and feed a dozen or more birds through January. It is also, once established, cheaper than fencing, needs no painting, and asks for perhaps two afternoons of trimming a year.

Choosing Your Species

Three shrubs do the heavy lifting, and the rest are supporting players. Aim for a mix, because different species ripen at different times and different birds prefer different cover.

• Hawthorn — the backbone of any British hedgerow. Dense, thorny, quick to establish, with creamy May blossom for insects and red haws in autumn that blackbirds, redwings and fieldfares strip in weeks. It responds well to hard cutting, which makes it ideal for a garden boundary.
• Blackthorn — the sloe. Earlier blossom than hawthorn, often in February, and a magnet for early bees. Its habit of suckering makes it superb low, impenetrable cover, which is exactly what dunnocks, robins and wrens want for nesting. Be aware that those suckers will creep into a lawn, so site it accordingly or mow round it firmly.
• Holly — evergreen, slow-growing and the single best winter shelter you can offer. Only female plants carry berries, and they need a male nearby for pollination, so plant at least two or three hollies if berries matter to you. Those berries hold on well into late winter when almost everything else has gone.

Fill the gaps with hazel, field maple, guelder rose, dog rose and crab apple. A hedge with six or seven species will support far more wildlife than a single-species run, and it looks better too.

Spacing and Planting

Plant bare-root stock between November and March, while the plants are dormant. Bare-root whips are cheaper, establish faster and come in a wider range of species than container-grown plants.

For a garden boundary, a single row at 30–40cm apart is plenty. If you have space to be generous, a double staggered row — 45cm between the rows and 60cm between plants within each row — knits together into a thicker, more bird-friendly barrier. That works out at roughly three plants per metre for a single row and five per metre for a double row.

Plant each whip to the same depth it sat in the nursery (look for the soil mark on the stem), firm the soil properly around the roots, mulch with well-rotted compost, and fit a spiral guard against rabbits. Water generously through the first two summers — a hedge that dries out in its first July will sit still for a year.

The First Three Years: Shaping, Not Shearing

This is where most new hedges go wrong. Resist the urge to clip it into a neat box in year one. After planting, cut the whips back hard: hawthorn and blackthorn to about 15–20cm above ground, hazel and field maple to 30cm, and holly by no more than a third, as it resents severe pruning. This feels brutal. It prompts the plant to throw up several stems from the base instead of one leggy trunk, which is what gives you a dense, nest-worthy hedge.

For the next two or three years, simply let it grow upwards and lightly tip the sides to encourage bushiness. When the hedge reaches the height you want, cut the top — then keep the sides trimmed so the hedge is wider at the base than at the top. That taper lets light reach the bottom, keeps growth dense to the ground, and stops the bare, leggy bottom that plagues badly shaped hedges.

Timing matters. Trim hawthorn and blackthorn in late winter while dormant, but finish before March. Holly is best cut in late summer. Between March and August, check any clump carefully before cutting — it is an offence to damage a nest in use, and hawthorn is prime nesting real estate.

Berries, Blossom and the Wildlife Year

A native hedge works hard right through the calendar. Blackthorn blossom in February gives early bees something to eat. Hawthorn flowers in May, feeding hoverflies and moths. Caterpillars of dozens of species — including the brimstone and the hawthorn shieldbug — graze the leaves through summer, and those caterpillars are what blue tits and great tits feed their broods on.

From September the haws and sloes ripen, and by November holly berries are ready to hold on through the lean months. If you can bear it, leave one side of the hedge untrimmed for a season so it flowers and fruits more heavily the following year — berry crops are carried on older wood, and a hedge clipped every year will berry less.

Walking a Hedge for Ideas

The best classroom for this is a country footpath. Look at an old field hedge in late winter and you will see the structure that works: a wide, tangled base, a dense middle, and a slightly ragged top. You will also see that the finest wildlife hedges are rarely trimmed flat on both sides every year.

Take a notebook rather than secateurs — wild plants are protected, and good hedgerow plants are worth seeking out from a nursery that specialises in British native stock. Choose your species, plant them close, cut them hard in the first winter, and let the birds do the rest.