One keeps the hedge at roughly the size it is. The other makes it smaller. Asking for the wrong one is the commonest reason a hedge quote surprises somebody.
Side by side
| Trimming | Reduction | |
|---|---|---|
| What it does | Maintains current size | Makes the hedge smaller |
| Cuts into | This season's growth | Older wood |
| Tools | Trimmers | Trimmers and saws |
| Waste | Modest | Substantial |
| Time | Hours | Can be a day or more |
| Species limits | Few | Significant on conifers |
| Appearance after | Immediately neat | Bare in places at first |
| Frequency | Annually or twice yearly | Occasionally, then maintain |
The quickest way to tell
How long has it been since it was last cut? That single question usually settles it.
| Since the last cut | What you're asking for |
|---|---|
| Under a year | Trimming |
| One season missed | A heavier trim |
| Two years | Borderline — probably reduction |
| Three years or more | Reduction, possibly staged |
Or by what's bothering you
- "It looks untidy" — trimming.
- "It's lost its shape" — trimming, possibly reshaping.
- "It's creeping over the path" — trimming, with a firmer line.
- "It's too tall" — reduction.
- "It's taking up too much garden" — reduction.
- "I can't reach the top any more" — reduction, then maintain.
- "It's been left for years" — reduction, possibly staged.
- "The neighbour's complained about light" — reduction.
They're usually stages, not alternatives
For a hedge that's got away from you, the honest sequence is one reduction to reset the size, then regular trimming to hold it there.
That's far cheaper than repeating a reduction every few years, and it keeps the hedge dense rather than cycling between overgrown and bare.
What changes the answer
- Species. A conifer past its green growth may not be reducible at all.
- Condition. A hedge bare at the base won't fill in simply because it's cut.
- Age. Very old neglected hedges sometimes suit laying or replacement better.
- Access. Reduction needs more room to work and more space for arisings.
- Time of year. Reductions suit late summer or autumn on most species.
When neither is the answer
Occasionally a hedge has gone too far. A conifer screen cut past its green years ago, or a hedge with a permanently bare base and no live growth low down, may be better replaced than reduced. Replanting takes years to screen again so it isn't a light decision — but it's sometimes the honest one, and we'd rather say so than take money for a cut that won't achieve what you want.
Not sure which you need?
Tell us how long it's been since the last cut — that usually answers it.