When to plant and prune Hornbeam
Hornbeam flowers from mid April to early May and the dates below cover planting, flowering and the pruning window.
Planting, flowering and pruning by region
Hornbeam is grown to the calendar rather than to the frost, so the same dates apply across the whole UK and every region below reads the same. Where a plant’s timings do follow the frost, Plot shifts them from the Midlands and Lowland Wales baseline using Met Office average frost dates.
| Where you are | Plant | In flower | Prune |
|---|---|---|---|
| South West Coast and Cornwall | late October to late December | mid April to early May | mid July to late August |
| South Coast and Channel | late October to late December | mid April to early May | mid July to late August |
| Greater London (Urban Heat Island) | late October to late December | mid April to early May | mid July to late August |
| South East and Home Counties | late October to late December | mid April to early May | mid July to late August |
| East Anglia | late October to late December | mid April to early May | mid July to late August |
| Midlands and Lowland Wales | late October to late December | mid April to early May | mid July to late August |
| Wales and West Coast | late October to late December | mid April to early May | mid July to late August |
| Northern England | late October to late December | mid April to early May | mid July to late August |
| Scotland Lowlands and Central Belt | late October to late December | mid April to early May | mid July to late August |
| Scotland Highlands and Islands | late October to late December | mid April to early May | mid July to late August |
| Northern Ireland | late October to late December | mid April to early May | mid July to late August |
| Channel Islands and Isle of Man | late October to late December | mid April to early May | mid July to late August |
Growing notes
The tougher stand-in for beech: it looks very similar as a clipped hedge and also holds dead brown leaves into winter, though not as persistently, and it copes with cold sites and heavy wet soil that would kill beech. Untrimmed it makes a 25m tree.
At a glance
- Spacing
- 40 cm between plants
- Eventual height
- 200 cm
- Eventual spread
- 60 cm
- Hardiness
- H7
- Sun
- Full
- Frost tender
- No
- Grows in a container
- No
- Balcony rating
- 1 out of 5
Feeding
A general purpose fertiliser in February helps newly planted hedges; discontinue once established.
Pruning: what to avoid
Keep to one late-summer trim; cutting in spring removes the shoots that hold the brown winter leaves. Do not cut hedges between March and August without checking first: under the Wildlife and Countryside Act 1981 it is an offence to damage or destroy the nest of any wild bird while it is in use or being built, and the main UK nesting season runs from about early March to August.
Pruning group
Trim once a year in mid to late summer
Bare-root season
Bare-root stock is lifted and sold while dormant, from early November to late February. Container-grown plants can go in at other times of year, but bare-root is cheaper and establishes well.
What usually goes wrong
- holds winter leaves less reliably than beech
- bare bases if only the top is trimmed
- honey fungus
Related guides
Timings cross-checked against RHS guidance for hornbeam.