Tree maintenance plays an essential role in keeping outdoor spaces safe, healthy, and visually appealing. Among the many pruning techniques used by professional tree surgeons, pollarding is one of the most specialised and effective methods for controlling tree growth. Although it may appear extreme at first glance, pollarding has been used for centuries to manage trees in urban areas, parks, streets, and large landscapes.
In this guide, we explain what pollarding is, why it is carried out, which trees are suitable for pollarding, and the benefits of this pruning technique.
What Is Pollarding?
Pollarding is an advanced pruning method where a tree’s upper branches are cut back significantly to encourage the growth of new shoots. In many cases, up to half of the tree’s crown can be removed during the process. The aim is not to damage the tree, but rather to retain it while controlling its overall size and shape.
When pollarding is carried out correctly, branches are cut back to specific points often referred to as “knuckles”. These knuckles then produce multiple new stems, creating a dense and controlled branch structure over time.
Pollarding is commonly seen on street trees throughout towns and cities across the UK, particularly on species such as Lime trees and London Plane trees. These trees are frequently pollarded to prevent excessive growth near roads, buildings, overhead cables, and pedestrian walkways.
Why Is Pollarding Necessary?
Trees in urban environments often face space limitations that are not present in natural woodland settings. Without proper management, large trees can quickly become difficult to maintain and may create safety concerns.
Pollarding is used for several important reasons:
Size Control
One of the primary reasons for pollarding is to restrict the overall size of a tree. This is especially useful in residential areas, town centres, car parks, and along streets where unrestricted growth could interfere with nearby structures or public spaces.
Improved Safety
Overgrown branches can become hazardous during storms or strong winds. Pollarding reduces the risk of branch failure by removing heavy limbs and encouraging new, manageable growth.
Extending Tree Lifespan
In some situations, pollarding can help prolong the life of a mature tree. By reducing stress on large branches and removing weakened sections, the tree can continue growing in a healthier and more stable condition.
Maintaining Appearance
Pollarded trees often develop a neat and uniform appearance. Many councils and property owners choose pollarding to maintain a consistent landscape design throughout public spaces and commercial properties.
Which Trees Can Be Pollarded?
Not all trees respond well to pollarding. Certain species tolerate heavy pruning much better than others and are more likely to produce healthy regrowth.
Common trees suitable for pollarding include:
- Lime trees
- London Plane trees
- Willow trees
- Poplar trees
- Maple trees
- Sycamore trees
- Ash trees
Professional assessment is always recommended before carrying out pollarding, as tree health, age, structure, and surrounding conditions must all be considered carefully.
The Pollarding Process
Pollarding should only be performed by experienced tree surgeons with the correct knowledge and equipment. Improper pruning can weaken the tree, increase disease risk, and negatively affect long-term growth.
The process usually involves the following steps:
Tree Inspection
The tree is first inspected to assess its health, structural condition, and suitability for pollarding. Existing decay, fungal growth, or weak branch unions must be identified before work begins.
Crown Reduction
Large branches are cut back systematically to predetermined pollarding points. This often involves removing a substantial portion of the crown while retaining the main framework of the tree.
Creating Knuckles
Branches are cut to specific areas where regrowth will occur. Over time, these points develop into visible “knuckles” from which multiple shoots emerge.
Ongoing Maintenance
Pollarding is not a one-time procedure. Once a tree has been pollarded, it usually requires regular maintenance every few years to manage regrowth and maintain the desired shape.
Benefits of Pollarding Trees
Pollarding offers several practical and environmental advantages when carried out correctly.
Prevents Excessive Growth
Trees in restricted urban spaces can quickly outgrow their surroundings. Pollarding keeps growth under control without the need for complete tree removal.
Encourages New Growth
The process stimulates vigorous new shoots, helping some trees maintain vitality and dense foliage.
Reduces Weight on Heavy Branches
Removing large limbs reduces stress on the main trunk and branch unions, lowering the risk of structural failure.
Protects Nearby Structures
Pollarding helps prevent branches from interfering with buildings, street lighting, signage, power lines, and roads.
Cost-Effective Long-Term Management
Regular pollarding can be more cost-effective than dealing with emergency tree work or removing mature trees entirely.
Are There Any Drawbacks to Pollarding?
Although pollarding can be highly effective, it is not suitable in every situation.
Some potential disadvantages include:
- The tree may appear harsh or bare immediately after pruning
- Incorrect pollarding can weaken the tree
- Ongoing maintenance is required
- Poorly timed pruning may expose trees to disease
This is why it is important to use qualified arborists who understand the correct pruning techniques and timing for each tree species.
When Is the Best Time for Pollarding?
The ideal time for pollarding depends on the tree species and local conditions. In most cases, pollarding is carried out during late winter or early spring while the tree is dormant. This helps minimise stress and encourages strong regrowth during the growing season.
Certain species may require different timing, so professional advice should always be sought before work begins.
Pollarding vs Crown Reduction
Pollarding and crown reduction are often confused, but they are very different tree pruning techniques.
Pollarding involves cutting branches back heavily to the same points on a regular cycle, encouraging repeated regrowth.
Crown reduction, on the other hand, involves selectively reducing the overall size of the crown while maintaining the tree’s natural shape.
The correct method depends on the tree species, location, age, and management goals.
Professional Pollarding Services
Pollarding should always be carried out by trained tree surgeons who understand proper pruning standards and tree biology. Professional arborists use specialist equipment and safe working practices to ensure trees remain healthy and structurally stable after pruning.
Whether managing street trees, commercial landscapes, or residential gardens, professional pollarding can help maintain safe, attractive, and healthy trees for many years.
Final Thoughts
Pollarding is one of the most extreme forms of pruning, but when performed correctly, it is a highly effective method of controlling tree growth and extending the life of certain tree species. Commonly used on Lime trees and London Plane trees throughout the UK, pollarding helps maintain safety, improve appearance, and manage trees in confined urban environments.
If you are considering pollarding for trees on your property, it is always best to seek advice from experienced tree surgeons who can assess the condition of the tree and recommend the most suitable approach.
