Crown Lifting In Oxford
When low-hanging branches are causing problems with light, access or clearance beneath a tree, crown lifting is often the most straightforward and least disruptive way to resolve the issue without altering the overall size or shape of the tree.
JW Tree Surgery carries out professional crown lifting for domestic customers throughout Oxford and the surrounding Oxfordshire area. We assess each situation carefully before agreeing the height and extent of lifting that is appropriate for the tree and its condition.
About Crown Lifting…
Crown lifting, sometimes referred to as crown raising, is the removal of the lower branches of a tree to increase the clearance between the ground and the base of the canopy. The result is a tree whose crown begins higher up the trunk than it did before, with open space beneath it that was previously occupied by branches.
The work is carried out to a pre-agreed clearance height, typically expressed in metres above ground level. A common target for domestic garden trees is a clearance of around two to three metres, which is enough to allow comfortable access for mowing, movement through the garden and clearance from structures close to the tree. Where the tree overhangs a driveway, pathway or boundary, a greater clearance height may be required to address the specific problem.
Why Crown Lifting Is Requested
Low branches that sweep down over a lawn make mowing around the base of the tree difficult or impossible. Branches that press against a fence, wall or outbuilding create friction that can damage the bark and the structure equally over time.
Branches overhanging a pathway, driveway or entrance present a practical inconvenience at best and a safety issue at worst, particularly where they catch pedestrians or restrict vehicle access. Crown lifting resolves all of these situations cleanly, leaving the upper canopy fully intact and the tree otherwise undisturbed.
Crown Lifting To Improve Light
One of the most frequently cited reasons for crown lifting is the improvement of light to the area beneath the tree. A tree whose canopy begins close to the ground casts shade across a wide area at low level, where it can suppress lawn growth, limit planting opportunities and make the space beneath the tree feel dark and enclosed.
Lifting the crown opens up the lower zone to more light without any reduction in the canopy above. This is often a more appropriate solution than crown thinning or reduction where the objective is simply to improve conditions at ground level rather than to reduce the overall size or density of the tree.
It is also a more permanent improvement: once the lower branches are removed they do not regrow from the same points, and the clearance achieved is maintained over time with minimal ongoing attention beyond managing any epicormic shoots that appear along the lower trunk.
Crown lifting must be carried out within clear limits if the tree is to remain structurally balanced and in good health. The guiding principle is that the crown should not be lifted to a height of more than one-third of the tree's total height, leaving at least two-thirds of the tree's overall height as productive, foliage-bearing crown.
Lifting the crown significantly beyond this threshold displaces the tree's foliage-bearing capacity upward, makes the tree top-heavy relative to its stem, and can create a structurally unbalanced tree that is more susceptible to wind damage and root movement.
It can also expose the lower trunk to direct sunlight after years of shading, which in some species can cause bark damage. We discuss the appropriate target height with every customer before work begins and will be clear if the clearance requested would take the operation beyond what is appropriate for the tree.
Crown Lifting On Mature Trees: Particular Care Required
Crown lifting on young or semi-mature trees is generally straightforward, as the lower branches are still relatively modest in size and the wounds created by their removal are small enough for the tree to compartmentalise and close effectively. On mature trees, the situation requires more careful judgement.
On a mature tree, lower branches that have been in place for many years can be of considerable diameter, and their removal creates large wounds close to the base of the trunk where the risk of decay entering the tree is greatest. The proximity of multiple large wounds to one another also increases the risk of cavities developing in close enough proximity to coalesce over time, which can compromise the structural integrity of the lower trunk.
For this reason, crown lifting on mature trees is generally best restricted to the removal of secondary or minor branches rather than major limbs, and the work should be spread across visits rather than attempting a significant lift in a single operation where the tree's age and condition warrant a more conservative approach.
Managing Epicormic Growth After Crown Lifting
Following a crown lift, it is common for epicormic shoots to appear along the lower section of the trunk. These are fast-growing shoots that emerge from dormant buds beneath the bark, triggered by the increased light reaching the trunk after the lower branches have been removed. They are the tree's natural response to the change in light conditions and are not a sign that anything has gone wrong.
Epicormic shoots along the lower trunk are generally undesirable as they can quickly create a new set of low-growing material in the same zone that the lifting was intended to clear. They can be rubbed off by hand when very young, before they harden into wood, or removed as part of a subsequent maintenance visit. We will advise you on what to expect for your specific tree and species after the lifting is complete.