A small tree you can tidy up from a ladder. A large, mature tree is a different animal: the weight, the height and whatever sits underneath all change the job completely. Here's what pruning a big tree actually involves, and why it isn't a DIY afternoon.
Need this sorted rather than explained? See our tree pruning & trimming service - free onsite quotes across Waikato.
Why big trees are a specialist job
Once a tree is tall enough that you can't reach the work from the ground or a short ladder, the risk climbs quickly. You're handling heavy limbs at height, often with a house, fence or power line directly below.
A branch that would be harmless coming off a 3-metre shrub can do real damage falling out of a 15-metre oak. That's why large tree work is done by climbers on ropes or from an elevated work platform, with the gear to control where every piece goes.
Climbing versus a cherry picker
There are two ways up a big tree. A qualified arborist can climb it on ropes and a harness, moving through the canopy to reach each branch. Or, where there's clear access, an elevated work platform can get a crew up to height faster.
Which one suits depends on the tree, the ground around it, and what needs doing. A tight back section usually means climbing. An open front yard with road access might suit a platform. We work out the safest approach when we quote.
Rigging and sectional lowering
On a large tree you rarely just cut a branch and let it drop. Limbs over a roof, a deck or a boundary get rigged: roped off, cut, then lowered under control so nothing lands where it shouldn't.
This is the part that takes the time and the skill on a big job. It's also what keeps your house, your neighbour's glasshouse and the crew in one piece, so it isn't a corner worth cutting to save a few dollars.
How much you can safely take off a mature tree
Big old trees are far less forgiving than young ones. As a rule we won't take more than about a fifth to a quarter of the live canopy off a mature tree in one go, and often less, because heavy pruning stresses an old tree and triggers a flush of weak regrowth.
If a large tree needs a lot brought off it, the right answer is usually to stage the work across a couple of seasons rather than strip it in one visit. Anyone offering to take the top out of a big tree in a single hit is lopping it, and that shortens its life.
Crown reduction, pollarding and what suits big trees
Most large-tree work is a crown reduction, bringing the height and spread in while keeping the tree's natural shape, or a crown thin to let wind pass through and ease the sail effect in a storm.
Some species also respond well to pollarding, a managed system where the tree is cut back to the same framework points every few years to hold it at a set size. It needs to be started correctly and kept up, so it's a decision to make with an arborist rather than a one-off fix.
When pruning isn't the answer
Sometimes a large tree is simply in the wrong spot, too close to the house, or in decline, and no amount of pruning fixes that. An honest arborist will tell you when you're better off removing a tree than paying to trim one that will be back in your gutters in two years.
If you've got a big tree that needs attention anywhere in Waikato, call us on 022 167 1268. We'll get up into it, assess it properly, and give you a straight recommendation, whether that's a prune, a staged reduction or removal.
