← All guides · Wildlife & the law · Updated October 2026

What your hedge does for the environment in CT3.

A well-managed hedge in CT3 does far more than mark a boundary. It slows floodwater draining toward the Nailbourne, feeds and shelters the wildlife corridor running through Wickhambreaux, and pulls traffic particles out of the air along the A257 before they reach your windows.

Each of these functions is already operating in CT3 hedgerows, but how well it operates depends on what species you have, how the hedge is managed and where your garden sits between the chalk and the sand. This guide works through each benefit with the local detail that determines whether your hedge is delivering it or missing it.

Wildlife corridors: the Little Stour and your garden boundary

The Little Stour runs from Littlebourne through Ickham, Wickhambreaux and Elmstone before joining the Stour north of Ash. The hedgerow field boundaries running across the valley floor act as wildlife corridors connecting patches of woodland, orchard, river margin and garden. A garden hedge in Ickham or Wickhambreaux that links to a field-boundary hawthorn line is a direct extension of that corridor network.

Small mammals, hedgehogs, slow worms, woodland birds and bats all use garden hedges as stepping stones through what would otherwise be a broken landscape. The corridor only works if the base of the hedge is dense enough to be usable. A hedge with bare legs at ground level is a gap in the network. That is one practical reason why the A-profile taper (wide at the base, narrower at the top) matters beyond just appearance: it preserves the lower growth where most of the corridor function is.

Species-rich hedges near woodland edge in this valley carry an additional obligation. Kent is a stronghold county for hazel dormice, which are protected under the Wildlife and Countryside Act 1981 alongside wild birds. Hazel dormice use hedges as commuting routes between tree patches. If your hedge is on the valley floor near Wickhambreaux and backs onto old orchards or coppice, see the dormice and hedgerows guide before deciding on a cut schedule or renovation.

Flood attenuation: slowing runoff toward the Nailbourne

The Nailbourne is a winterbourne stream. It only flows after wet winters, running from the chalk above Adisham and Barham down through Bekesbourne toward the Stour. In wet winters it floods the valley floor at Bekesbourne and Littlebourne with sometimes significant effect on roads and gardens nearby.

Hedgerows on the sloping chalk ground above the valley intercept rainfall before it reaches the stream. The root system of an established hawthorn or mixed native hedge penetrates the chalk and holds a considerable volume of water in the soil that would otherwise run off the surface. On a 1-in-20 slope above Bekesbourne, the difference between a bare grass strip and a hedge-and-margin combination can change the peak flow into the valley significantly in a heavy November rain event.

This is why the Hedgerow Management Regulations 2024 include a 2-metre buffer strip requirement alongside qualifying agricultural hedgerows: the buffer keeps vegetation rooted alongside the hedge, and that vegetation is a key part of how overland flow is managed. If you have agricultural boundary hedges between Adisham, Littlebourne and Bekesbourne, see the Hedgerow Management Regulations 2024 guide for what the buffer strip requirement means in practice.

On Thanet Sand toward Ash and Staple, drainage works differently. Sand drains fast, which reduces overland flow risk but means water moves rapidly into the groundwater rather than being held at the surface. Hedges there still slow wind erosion and hold the soil structure, which matters for the field-boundary hedges on the larger rural plots around Preston and Elmstone.

Air quality and noise: the A257 corridor

The A257 carries commercial traffic between Canterbury and Sandwich year-round. Gardens backing onto the road through Wingham village, Ash and Littlebourne get elevated particulate levels in dry summer spells when wind patterns move road dust and exhaust particles into residential areas.

A dense hedge traps particulates on leaf surfaces. Rough-textured and complex leaves trap more than smooth ones: hawthorn and field maple outperform hornbeam or beech at particulate capture, which is one genuine reason to include them in a mixed hedge along road boundaries rather than planting a single formal species. An RHS research programme into urban and suburban hedge function found measurable reductions in particulate levels inside the garden behind a well-grown hedge compared with fence-bounded or open plots.

The noise benefit is also real. The same RHS research found reductions of up to 8 decibels in perceived road noise behind a mature hedge compared with an equivalent fence. Eight decibels is not the difference between quiet and loud, but it is the difference between a noise that is intrusive and one that sits in the background. A hedge needs to be at least 1.5 metres high and around 0.6 metres deep to give a consistent acoustic effect: a thin, spindly hedge gives little benefit. This is another practical reason why letting a hedge run slightly wider than strictly necessary pays off over time on a road boundary.

Carbon storage: roots in the chalk and on Thanet Sand

Hedgerows store carbon in two ways: in the above-ground woody biomass of the stems and branches, and in the root mass and soil organic matter below ground. For most garden hedges, the below-ground fraction is larger and more stable over time.

On the chalk soils on the Adisham and Bekesbourne side of the round, native mixed hedges with deep tap roots penetrate the chalk face and store significant below-ground carbon. Hawthorn, field maple and spindle all send substantial root systems into the chalk. A Countryside Survey analysis cited by Natural England found that the UK's farm hedgerow network holds more above-ground carbon than all its broadleaved woodland combined, when measured per linear metre. A garden hedge of any meaningful length is a small carbon asset in the same calculation.

Thanet Sand toward Ash is more free-draining than chalk, and organic matter breaks down faster in warm, well-aerated sand. But a well-mulched hedge base on sandy ground still accumulates soil carbon steadily over years, and the root biomass of an established hedge is largely independent of soil type.

The carbon case reinforces one practical point: leaving a hedge in place and managing it, rather than removing it and starting again, is almost always the better carbon choice. A removed hedge loses years of stored root carbon to decomposition over the following decade.

Temperature buffering: chalk downland in summer, valley frost in winter

Garden hedges reduce temperature extremes on both sides of the boundary. On chalk ground near Adisham and Goodnestone, which sits higher and more exposed than the valley, strong easterlies come off the North Sea in winter with little to slow them. A well-placed mixed native hedge or hornbeam screen on the north-east boundary cuts wind chill noticeably for the garden on the sheltered side, and for the plants inside it.

In summer, a south-facing garden hedge provides shade that cools the immediate area. The cooling effect is most useful on the chalk downland sites above the valley, where July temperatures in a dry year can push well above 30C in the open. A hedge does not replace shade trees, but the diffuse shade on the shaded side of a tall hedge is measurably cooler than an equivalent fence shadow on a still afternoon.

The Little Stour valley frost pockets around Wickhambreaux and Ickham are partly created by cold air pooling where there are no hedges or tree lines to break the flow across the valley floor. Cold air is denser than warm air and drains downhill, collecting in hollows. A planted hedge on the boundary of a frost-prone plot at the valley bottom can deflect cold air over the garden rather than into it. This does not eliminate frost risk in January and February, but it changes the severity of a frost event on the most vulnerable nights.

What the RHS research shows

The Royal Horticultural Society has run a research programme into the environmental functions of hedges in UK gardens and urban environments, finding consistent evidence across the five benefit categories described in this guide. Leigh Hunt, Principal Horticultural Advisor at the RHS, summarises the case in a short video:

Video: Hedges to help the environment, presented by Leigh Hunt, Principal Horticultural Advisor, Royal Horticultural Society. Published by the RHS.

Common questions

Do hedges genuinely help with flooding in CT3?

Yes. An established native hedge with deep roots in chalk or clay holds rainfall before it reaches the road or stream. On sloping ground above the Nailbourne valley near Bekesbourne and Littlebourne, a hawthorn or mixed native hedge intercepts overland flow at source. The Hedgerow Management Regulations 2024 include buffer strip requirements specifically to manage runoff from agricultural land, which reflects how seriously land managers now treat this function.

Can a garden hedge reduce road noise from the A257?

Measurably, yes. RHS research found a well-grown boundary hedge can reduce perceived road noise by up to 8 decibels compared with an open or fence-bounded plot. That is the difference between a noise that is intrusive and one that fades into background. A dense evergreen hedge of at least 1.5 metres in height and around 0.6 metres in depth gives the best acoustic result.

What wildlife uses garden hedges in the Wingham round?

Resident birds use hedges for nesting and foraging year-round: blackbird, robin, wren, dunnock, long-tailed tit, bullfinch and song thrush are all regular hedge nesters in CT3. Small mammals including hedgehog, wood mouse, bank vole and hazel dormouse rely on hedge bases as travel corridors. Slow worms, common lizards and grass snakes shelter in the tangle at the base of an uncut or lightly managed native hedge. In species-rich hedges near woodland edge around the Little Stour valley, Kent hazel dormice use the hedge as a commuting route between tree patches.

When can I legally cut a hedge in Wingham?

Section 1 of the Wildlife and Countryside Act 1981 makes it an offence to damage or destroy an active wild bird's nest. The accepted guidance window for nesting is 1 March to 31 August. Heavy hedge work defaults to September through February. Inside the nesting window, a light trim on formal species is only acceptable after a competent visual check confirms no active nests. Gardens inside the Wingham Conservation Area also need to check whether Section 211 notice requirements apply before removing significant woody stems: see the Section 211 guide for that process.

Which hedge species give the best environmental value for CT3 gardens?

For wildlife and ecosystem services together, a native mixed hedge outperforms any single species. On chalk near Adisham and Bekesbourne, hawthorn, field maple, spindle, dogwood and wayfaring tree are all native to the habitat. On Thanet Sand toward Ash, adding hazel and blackthorn to the mix suits the freer-draining ground. For flood attenuation specifically, deep-rooted species matter more than foliage density: hawthorn and blackthorn both send roots well into chalk. For air quality and noise, dense evergreens such as holly, yew or hornbeam give year-round cover. See the species for chalk and Thanet Sand guide for the full comparison.

Sources: RHS hedges research programme (rhs.org.uk/science/research/environmental-benefits-of-hedges); Countryside Survey 2007 (Natural England / Centre for Ecology and Hydrology); Wildlife and Countryside Act 1981 s.1; Hedgerow Management Regulations 2024 (SI 2024/118); Kent Wildlife Trust hedgerow guidance.