0423 190 077 Published: | Category: Tree Care Fundamentals | Author: Arborista Trees
A homeowner's guide to how – and why – professional arborists prune trees
Pruning is one of the most common tree services we're asked for, and also one of the most misunderstood. Done well, it improves a tree's safety, structure, health and appearance. Done poorly, it can permanently damage a tree, shorten its life, or even make it more dangerous. Professional pruning in Australia is guided by the Australian Standard for pruning of amenity trees (AS4373-2007), which sets out the accepted classes of pruning and the correct techniques for making cuts.
Why We Prune
Every pruning job should have a clear purpose. Common reasons include removing parts of the tree that pose a safety risk, clearing branches away from buildings or power lines, improving the tree's long-term structure, managing its size, or simply maintaining its health and appearance. Before any cut is made, an arborist should be able to explain what is being removed, how it will be cut, and why that approach best serves the tree.
Less Is More: Foliage Retention
Every cut into living tissue is a wound, and the tree has to spend energy defending and sealing it. Because of this, the Australian Standard is clear that only the minimum amount of material needed to achieve the goal of the prune should be removed. Over-pruning can stress a tree, leave it vulnerable to pests and disease, and in older or weaker trees, contribute to serious decline.
The Main Types of Pruning
Depending on the tree and the desired outcome, an arborist may recommend one or more of the following pruning approaches:
- Deadwood removal – taking out dead or dying branches, particularly where they overhang paths, buildings or other high-use areas
- Crown lifting – raising the lowest branches to create clearance for pedestrians, vehicles or sightlines
- Crown thinning – selectively removing smaller branches to improve light and airflow through the canopy
- Reduction pruning – shortening branches back to a suitable lateral to reduce the overall size of the tree or a specific limb
- Formative and structural pruning – shaping young trees early on to build strong, well-spaced branch structure and prevent future problems
- Pollarding – a specialised, ongoing technique used on certain species to control size over the long term, generally started while the tree is young
- Retrenchment pruning – a gentle, staged approach used on mature or veteran trees, aimed at mimicking the tree's own natural process of ageing and canopy retreat
Making the Cut the Right Way
How a branch is cut matters just as much as which branch is chosen. Modern arboricultural practice favours what's known as natural target pruning: cutting just outside the branch collar, the slightly swollen area where a branch meets the trunk or a larger limb. This preserves the tree's natural chemical and physical defences and allows the wound to seal over as efficiently as possible.
Practices We Avoid
A handful of once-common techniques are now recognised as harmful and are avoided by qualified arborists except in very specific, specialised circumstances:
- Lopping and topping – cutting branches or the main stem back to an arbitrary point rather than a proper lateral, which triggers weak, fast-growing regrowth and long-term decay
- Flush cuts – cutting flush against the trunk and removing the branch collar, which creates a larger wound and removes the tree's natural defensive tissue
- Wound painting – sealing cuts with paints or dressings, now known to offer no protective benefit and, in some cases, to trap moisture against the wood
Good pruning respects how a tree naturally grows and defends itself. A qualified arborist doesn't just remove branches – they make deliberate, informed decisions about what to cut, how to cut it, and what the tree will look like years down the track.
Considering Pruning on Your Property?
Speak with the qualified arborists at Arborist @ Trees for an assessment and a pruning plan tailored to your trees. Contact us to book an inspection.
Related Services
Arborista Trees follows Australian Standard AS4373-2007 on every tree pruning and trimming job across Canberra. If your tree has grown beyond pruning and needs to come down, our tree removal service handles everything safely — including stump grinding afterwards. For urgent storm damage, our 24/7 emergency team responds day or night.
"Every tree has a story. Our job is to make sure its next chapter is safe for people, property, and the environment."
Book your inspection today! Call 0423 190 077 for a free, no-obligation assessment.
