Your guide to what to prune, how to prune, and why it matters
January might feel quiet in the garden, but it’s one of the best months to get ahead. While most deciduous trees, shrubs and hedges are resting, gardeners can use this natural pause to shape, tidy and set plants up for a healthier, stronger year. Dormant pruning is not only easier at this time of year — it’s also better for the long-term structure and vigour of your plants.
Whether you’re wondering when to prune, how to prune, or what you can prune in winter, this guide covers the essentials.
What Is Dormant Pruning?
Dormant pruning simply means pruning plants while they’re not actively growing. Most deciduous trees, shrubs and hedges drop their leaves in autumn and don’t wake up again until early spring.
During this quiet window, pruning causes less stress and gives you a clear view of the plant’s shape.
The Benefits of Pruning in January
1. Clear visibility
Without leaves, it’s easier to see crossing branches, damaged wood and the overall structure. This means cleaner cuts and better long-term shape.
2. Reduced disease risk
Many plant-affecting pests and fungal spores are inactive in colder weather, so there’s less chance of infection entering fresh cuts.
3. Stronger spring growth
Pruning now directs the plant’s energy where you want it to go. Come spring, you’ll see healthier, more vigorous new shoots.
4. Improved flowering and fruiting
Many shrubs and fruit trees respond beautifully to a winter prune, producing more blooms and better crops.
What You Can Prune in January
Here are the plants that actively benefit from a dormant-season tidy:
Deciduous Trees
- Apple and pear trees
- Most ornamental trees once established
- Silver birch & maples — prune only in deepest winter to avoid sap bleeding
Focus on removing:
- Crossing branches
- Dead, diseased or damaged wood
- Branches growing inward, causing congestion
Deciduous Shrubs
Perfect candidates include:
- Buddleja
- Viburnum (some varieties)
- Dogwood (Cornus)
- Cotinus
- Spirea
- Hardy fuchsias
- Philadelphus
Many respond well to a rejuvenation prune — cutting back harder to promote a strong, fresh framework.
Hedges
Deciduous hedges such as beech, hornbeam and hawthorn can all be trimmed now to maintain shape before spring growth kicks in.
What NOT to Prune in January
To avoid harming plants or losing blooms later in the year, steer clear of pruning:
Spring-flowering shrubs
These form buds the previous summer, so pruning now removes the very blossoms you’re looking forward to.
Avoid cutting:
- Forsythia
- Camellia
- Rhododendron
- Azalea
- Magnolia
- Lilac
Tender plants
Anything borderline-hardy should be left alone until spring to avoid exposing soft growth to frost damage.
Evergreen shrubs
Most are best left until late spring or early summer.
How to Prune: A Simple Step-By-Step Guide
1. Start with the ‘three Ds’
Remove anything dead, diseased or damaged. This instantly improves plant health.
2. Work on shape
Aim for an open, balanced structure that lets light and air circulate.
3. Make clean cuts
Cut just above a bud, growing outward, at a slight angle. This encourages strong, healthy new shoots.
4. Don’t over-prune
As a rule, avoid removing more than a third of the plant in one go — unless it’s a shrub that responds well to hard pruning (like buddleja or cornus).
5. Step back regularly
A quick glance every few minutes keeps the overall shape in check.
The Right Tools Make All the Difference
Clean, sharp tools lead to clean cuts — and clean cuts lead to healthier plants.
For winter pruning, you'll want:
-
Bypass secateurs for precise cuts on live wood
-
Loppers for thicker branches
-
A pruning saw for anything too big for loppers
-
Sturdy gloves to protect hands from thorns and rough bark
At Kings, we stock a full range of quality pruning tools designed for comfort, sharpness and durability — perfect whether you’re tackling fruit trees or giving shrubs a winter refresh. Pop in if you need advice on choosing the right tool for your garden.
Additional January Jobs While You're Out There
- Mulch around shrubs and young trees
- Check plant ties and supports
- Remove any lingering leaves harbouring pests
- Start planning your spring planting layout
January pruning might not come with instant rewards, but it sets up your garden beautifully for spring. With better shape, improved airflow and fresh new growth on the way, this quiet winter task delivers months of benefits.
If you’d like help choosing the right tools or want guidance on specific plants in your garden, the Kings team in Exmouth and Sidmouth are always happy to help.