Why a native hedgerow earns its place

A mixed hedge of British natives is the closest thing most gardens have to a woodland edge, and that is precisely why wildlife uses it so heavily. It offers nesting cover, larval food plants, berries, catkins, shelter from wind and a safe corridor for bats and small mammals moving between gardens. In a coastal garden this matters even more. Salt-laden wind, thin sandy soils and exposed positions strip away natural cover, so a well-planted hedge becomes a genuine refuge rather than a decorative boundary.

The four species below — hawthorn, blackthorn, hazel and field maple — are all native, all tough, and together they give you something of interest in every month of the year. Plant them as bare-root whips in winter and you will spend very little for a hedge that will outlive most of what you buy in pots.

The four workhorses, and what each brings

• Hawthorn (Crataegus monogyna) — the backbone of any traditional British hedge. Creamy May blossom feeds early pollinators, and the autumn haws are stripped by blackbirds, redwings and fieldfares. It supports a huge number of insect species and its dense, thorny growth makes it the nest site of choice for dunnocks and finches.
• Blackthorn (Prunus spinosa) — flowers on bare wood in March and April, often the first reliable nectar on a cold coast. Sloes follow in autumn, and the suckering, thicket-forming habit creates the sort of impenetrable base that wrens and robins adore. It is exceptionally wind-hardy.
• Hazel (Corylus avellana) — lamb's-tail catkins in February, soft leaves for moth larvae, and nuts in autumn for nuthatches, jays and small mammals. Hazel responds well to cutting, so it suits a hedge you intend to manage.
• Field maple (Acer campestre) — the only native maple. Butter-yellow autumn colour, winged seeds that finches take, and honeydew from aphids that draws in hoverflies and wasps. It tolerates chalk, clay and wind, and copes better with salt spray than most people expect.

If you have room, add wild privet, guelder rose or dog rose for extra flowers and hips. Keep the four main species dominant, though — a hedge with too many oddments loses its structure.

Planting for an exposed coastal site

Choose your line before you dig. In a windy garden, run the hedge across the prevailing wind rather than along it, and set it back from the very front of the plot where salt blast is fiercest. A double staggered row is worth the extra plants in these conditions: it knits together faster and gives the hedge internal calm that single rows never achieve.

Improve the planting strip generously. Fork over a metre-wide band, working in two or three buckets of garden compost or well-rotted manure per metre. On sandy coastal soils, add extra organic matter and a handful of seaweed meal per plant if you can get it. If your soil is heavy clay, plant on a slight ridge so winter water cannot sit around the roots.

Planting bare-root whips in winter

Bare-root whips are lifted and sold between November and March, and they establish far better than container-grown stock provided they go in while dormant. Aim for November to early December, or late February to March if the ground has been frozen or waterlogged. Never plant into frozen or sodden soil.

• Space plants 30–40cm apart in a single row, or 45cm apart in a double staggered row — roughly five whips per metre for a thick hedge.
• Dig a trench about a spade's depth and wide enough to spread the roots without cramping them.
• Set each whip to the same depth it was growing in the nursery — look for the soil mark on the stem.
• Firm the soil in stages with your heel, then mulch with 5–8cm of bark or compost, keeping it clear of the stems.
• Fit spiral guards against rabbits and stake with a short cane so the whip is not rocked loose by wind.

If you cannot plant immediately, heel the whips into a spare patch of soil in bundles and keep the roots damp.

Watering through the first summer

This is the step most people skip, and it is the one that decides whether your hedge romps away or sulks. A bare-root whip has lost most of its roots in lifting, so it depends entirely on you for its first year. Water each plant with 10 litres a week from April through to September, and double that during hot, windy spells — coastal wind dries foliage and soil faster than still inland air.

Water in the evening so it soaks in rather than evaporating, and direct it at the base rather than over the leaves. A temporary windbreak of woven fabric or brash, set a metre or so to windward, will cut water loss dramatically in an exposed garden. Leave it in place for the first two winters, then remove it as the hedge thickens.

Managing it for birds and insects

Resist the urge to clip your hedge into a tight box. Birds need depth, and insects need flowers and berries, both of which are killed by annual trimming. Cut instead on a two to three year rotation, in late winter before nesting begins, and only ever take one side or one section in a single year. Leave the top alone where you can and aim for a slightly A-shaped profile, wider at the base, so light reaches the bottom and the hedge does not go bare and leggy.

Never cut between March and August — that is peak nesting season, and a hedge full of young birds is exactly what you planted it for. Leave fallen leaves and a little untidiness at the base, and let one or two stems grow up into small trees. Within a few years you will have a hedge that hums in May, rustles with sparrows in June and feeds winter thrushes right through to February.