HEDGEROWS IN THE BRITISH LANDSCAPE: ECOLOGICAL CORRIDORS, BIODIVERSITY AND THE IMPORTANCE OF LONG-TERM STEWARDSHIP

Hedgerows are one of the defining characteristics of the British landscape. They shape rural identity, frame views, define boundaries, and contribute significantly to landscape character. However, beyond their visual role, hedgerows have immense ecological value and form part of a much larger environmental network that supports biodiversity, ecological resilience, and human wellbeing.

When designed and managed appropriately, hedgerows have the potential to function as ecological corridors — linking fragmented habitats and allowing wildlife to move safely through landscapes that may otherwise be heavily altered by agriculture, infrastructure, or development. These connected linear habitats provide opportunities for feeding, breeding, nesting, shelter, and seasonal movement for a wide range of species including birds, insects, mammals, amphibians, and pollinators.

Species-rich hedgerows are particularly important in supporting ecological diversity. A varied structure containing native trees, shrubs, grasses, climbers, scrub habitat, and ground flora creates layered habitat opportunities that support different species at different heights and seasonal conditions. Hawthorn, blackthorn, hazel, field maple, spindle, dog rose, guelder rose, holly, and elder are all examples of species that can contribute to more resilient and ecologically functional hedgerows within the UK landscape.

Structurally diverse hedgerows also provide important environmental services for people and places. They can act as visual and acoustic buffers along roads and development edges, help reduce wind exposure, contribute toward carbon sequestration, improve air quality, intercept particulate pollution, and soften the visual impact of development. In urban and peri-urban settings, they can help create more comfortable and human-scaled environments while simultaneously supporting wildlife.

However, many contemporary hedgerows function poorly from an ecological perspective. Frequently, they consist of single species planting that is intensively clipped into narrow formal shapes with limited structural diversity. While this approach may create a neat visual appearance, it often significantly reduces habitat value by limiting flowering, fruiting, nesting opportunities, and natural growth form.

Over-management can also prevent the development of healthy lower-level vegetation. In many cases, plastic spirals and tree guards are installed around new hedgerow planting but are not monitored or removed appropriately over time. As vegetation grows, these guards can constrict stems, damage growth, trap moisture, harbour litter, and contribute to long-term plastic pollution within the landscape. Often, they degrade slowly, becoming visually intrusive while dispersing fragments into surrounding habitats.

A more ecologically responsive approach involves allowing hedgerows to develop greater structural variation and transitional edge conditions over time. Rather than maintaining abrupt and heavily clipped boundaries, opportunities exist to introduce successional planting and encourage scrub habitat formation along hedgerow edges.

Successional planting refers to the gradual establishment and evolution of vegetation communities over time. Within hedgerow systems, this may involve creating softer interfaces of native grasses, wildflowers, bramble, dog rose, young saplings, and naturally regenerating shrubs that provide habitat complexity and seasonal variation. Scrub habitat — often undervalued within managed landscapes — plays a critical ecological role by providing shelter, nesting habitat, forage opportunities, and transitional ecological conditions between open ground and woodland structure.

Research by organisations such as the People’s Trust for Endangered Species (PTES) highlights the importance of hedgerow structure, particularly the value of dense growth at the base, connected canopies, and varied height profiles in supporting wildlife movement and habitat function.

Importantly, hedgerows should not be considered as isolated features. Their true value emerges when they form part of a wider green infrastructure network — connecting woodlands, meadows, watercourses, parks, and open countryside into cohesive ecological systems.

As pressures from urbanisation, habitat fragmentation, and climate change continue to increase, the careful planning, establishment, and long-term stewardship of hedgerows may become increasingly important within both rural and urban landscapes. Their contribution extends beyond biodiversity alone: they help create healthier, more resilient, and more meaningful environments for both people and nature.

Ultimately, hedgerows remind us that landscape infrastructure does not always need to be engineered or monumental to be valuable. Some of the most important ecological systems are living, evolving structures that quietly connect landscapes over time.

Sketches by Heathland Studio Landscape Architects