Uplifting or crown lifting is a type of tree pruning when the crown of the tree (i.e. all of the branches and foliage) is reduced in size from the underside. Limbs and branches that are too low can often cause problems for people and the tree itself. It may not only be an obstacle on the footpath or driveway, but also the pressure applied on the trunk of the tree.
The lower a crown is, the more pressure it puts on the tree. It also lessens the amount of light that can reach the lower branches and the underbrush. Removing the lower portion of the crown also decreases the foliage litter. Another benefit to this method of tree pruning is that it can increase the view. If a tree has completely matured and has an unsuitable crown, uplifting is not the ideal option as this is the period in which the tree is most vulnerable to large wounds that can attract insects and promote fungal growth. This can be alleviated by asking for crown lifting as soon as you are concerned.
Main Pruning Definitions
Crown Lift or Crown Raising
Crown lifting is the removal of the lowest branches and/or preparing of lower branches for future removal. Good practice dictates crown lifting should not normally include the removal of large branches growing directly from the trunk as this can cause large wounds which can become extensively decayed leading to further long term problems or more short term biomechanical instability.
Crown Lift or Crown Raising
Crown lifting is the removal of the lowest branches and/or preparing of lower branches for future removal. Good practice dictates crown lifting should not normally include the removal of large branches growing directly from the trunk as this can cause large wounds which can become extensively decayed leading to further long term problems or more short term biomechanical instability.
Crown Reduction
The reduction in height and/or spread of the crown of a tree. It may be used to reduce stress on branches or the whole tree, make the tree more suited to its environment or to reduce the effects of shading and light loss, etc. The final result should retain the main framework of the crown, and so a significant proportion of the leaf-bearing structure, and leave a similar, although smaller outline, and not necessarily achieve symmetry for its own sake.
Every pruning cut inflicts a wound on the tree. The ability of a tree to withstand a wound and maintain healthy growth is greatly affected by the pruning cut – its size, angle and position relative to the retained parts of the tree.
As a general rule branches should be removed at their point of attachment or shortened to a lateral which is at least 1/3 of the diameter of the removed portion of the branch, and all cuts should be kept as small as possible.
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