These are two different jobs at two different prices, and being quoted for one when you needed the other is the commonest source of disappointment in hedge work. The distinction is simple once you see it.
The difference in one line
How to tell which you need
| If this is true | You want |
|---|---|
| Cut within the last year or two | Trimming |
| It's the right size, just shaggy | Trimming |
| You can still see the old cutting line | Trimming |
| It's crept into the border or path | Reduction |
| It's beyond reach from a step ladder | Reduction |
| Bare and leggy at the base | Reduction, then regular trimming |
| Not cut properly in five years | Reduction |
| Wider at the top than the bottom | Reduction |
The old cutting line is the giveaway
Look into the hedge from the side. If you can see where it used to be cut — a change in stem thickness, or a shelf of older growth inside the newer stuff — that line is usually where it can be taken back to, and the fact you can still find it means the hedge is recoverable.
When the old line has disappeared entirely inside the growth, you are past trimming. That is a reduction, and on a conifer it is the point at which the species question becomes urgent.
Why trimming a too-big hedge does not work
It is tempting to keep trimming and hope. What actually happens is that each trim starts from wherever the hedge now is, so the hedge gets very slightly bigger every cycle. Ten years of that is how a manageable boundary becomes an unmanageable one, and nobody notices because it never changes much between one summer and the next.
The cost picture
A reduction costs several times a routine trim, which makes it look like the expensive option. Over a decade it usually is not.
- Reduce once, then trim annually. One larger cost, then nine small ones. The hedge is the right size throughout.
- Trim only, indefinitely. Ten moderate costs, and a hedge that is bigger at the end than the start.
- Leave it, then reduce every few years. Three or four large costs, and a hedge that looks poor for most of the decade.
The first is nearly always the cheapest and always the best-looking.
The one case where reduction may not be available
If the hedge is Leylandii, Lawson, thuja or most other conifers, reduction is limited to the depth of the green growth. Cut past it and the bare brown wood stays brown permanently.
So on a conifer hedge the diagnosis has an extra step: not just "does this need reducing" but "can it be reduced". Push a hand into the foliage and see how deep the green goes. That measurement decides whether reduction is an option at all — and it is why we check before quoting a height rather than after.
On beech, hornbeam, yew, laurel, privet, hawthorn and holly, none of this applies. They regenerate from old wood, and however overgrown they look, reduction is available.
Not sure which your hedge needs?
Send us a photo or describe it and we'll tell you whether a trim will do or whether it needs bringing back properly.
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