Why a Mixed Native Hedge Beats a Single Species

A hedge is the hardest-working piece of habitat most of us will ever plant. It gives birds somewhere to nest, small mammals a corridor to move along, insects a larder, and you a boundary that softens the wind and frames the garden. Plant it with a single species and you get a wall of green. Plant it with a mix of natives and you get something closer to a woodland edge — layered, varied, and busy with life from February right through to the first frosts.

Hawthorn, blackthorn and hazel are the classic trio for a reason. They are tough, they are British, and between them they cover the whole calendar: blossom in spring, nuts and berries in autumn, dense thorny cover in winter when everything else has gone bare. Add a few extras and you have a hedge that earns its keep.

Choosing Your Shrubs

As a rough rule for a wildlife hedge, think about two-thirds thorn, one-third nuts and flowers. That gives cover where it matters most — small birds need dense, prickly growth to feel safe — while still producing a decent harvest.

• Hawthorn is the backbone. It grows almost anywhere, tolerates heavy clay and exposed sites, and its May blossom feeds early insects before the haws ripen red in autumn for thrushes and fieldfares.
• Blackthorn throws up suckers and makes a near-impenetrable thicket — ideal nesting cover for dunnocks and blackbirds. Its white flowers open on bare stems in March, and the sloes that follow are loved by winter migrants.
• Hazel brings a softer texture and catkins in late winter, plus nuts in good years. It also responds well to cutting, so it can be coppiced in sections to let light down to the hedge bottom.
• Good companions: field maple, dog rose, guelder rose, wild privet, crab apple, spindle and holly. Even three or four of these will widen the range of food and flowering times no end.

Planting: Get It Right Once

Bare-root plants are the way to go — cheaper, lighter, and they establish better than pots, provided you plant between November and March while they are dormant. Order in late autumn for the widest choice of species.

Prepare a strip at least 60cm wide, clear the grass, and fork in a little well-rotted compost if your soil is thin or stony. Plant in a double staggered row, 40–45cm between plants and about 30cm between the rows. That looks alarmingly close, but it is exactly what gives you a dense, stock-proof hedge rather than a row of sad individual bushes. Firm each plant in well, water thoroughly, and mulch with bark or leafmould to keep weeds down and moisture in.

Put a rabbit guard or spiral around each stem if you have rabbits or hares about, and stake a line of string between two canes to keep your rows straight — it makes later trimming far easier.

The First Three Years

New hedges need help before they need cutting. Water deeply in dry spells through the first two summers; a fortnightly soaking is worth more than a daily sprinkle. Keep a metre-wide strip clear of grass and weeds, by hand or with a mulch, because competition at the base is the main reason young hedges fail.

Prune lightly in the first winter, just tipping back any long, whippy growth to encourage bushing from the base. Do not be tempted to cut hard — a hedge that is trimmed too tightly in its youth will always be thin and leggy at the bottom.

Managing a Hedge for Wildlife

The single most important rule is timing. Between March and August, assume something is nesting in there. Under the Wildlife and Countryside Act it is an offence to damage or destroy the nest of a wild bird while it is in use, so leave the hedge alone through the breeding season and cut in late winter instead.

The second rule is to cut in rotation. Rather than running a hedge trimmer over the whole length every year, divide it into three or four sections and tackle one section each winter, on a three-year cycle. This way there is always some older growth with flower buds and berries, and always a supply of dense cover. Where you have room, leave a section to grow taller and only cut it every few years — that is what produces the best nesting sites and the heaviest crops of haws and sloes.

Cut with a slight taper, wider at the base than the top. A hedge shaped like an A frames the light and keeps the bottom leafy instead of bald, which is exactly what ground-feeding birds want.

Small Touches That Make a Big Difference

• Leave the hedge bottom rough — a thatch of dead leaves and tussocky grass is a hunting ground for wrens, hedgehogs and beetles.
• Allow one or two gaps at ground level, or a small tunnel, so hedgehogs can pass through rather than being funnelled onto the road.
• Pile up cuttings and logs nearby instead of burning them; a log pile beside a hedge becomes a dormouse-friendly, beetle-rich annexe.
• Plant a few native climbers — honeysuckle or wild clematis — to scramble through the top and add another layer of flowers and scent.
• Skip the herbicide under the hedge. A strip of rough grass and wildflowers at the base feeds the insects that feed everything else.

Give a mixed native hedge five years and it will start paying you back in ways you did not plan for: a blackcap singing from the top, a family of long-tailed tits working along the line, the first sloes for gin in October. Plant it well, cut it kindly, and it will outlive most of what else you do in the garden.