Winter-Proof your trellis: a step-by-step guide to protecting garden structures

As winter approaches, gardens across the UK begin their seasonal wind-down. With climbing plants dormant and leaves fallen, it’s the perfect time to turn your attention to your trellis panels – those hardworking yet often overlooked heroes of garden structure. Whether you rely on them for privacy, plant support or simply visual interest, a little winter maintenance goes a long way in preserving their beauty and integrity for years to come.

Here’s a practical guide to help you protect your trellis panels and other wooden garden structures from the harsh effects of cold, damp weather.

Why winter maintenance matters

Trellis panels are exposed to the full force of British winter weather. Freezing temperatures, heavy rain and persistent moisture can cause untreated or neglected timber to warp, rot or become unstable over time. By carrying out a few simple maintenance tasks now, you’ll ensure your trellis remains secure, stylish and ready to support fresh spring growth.

Step 1: Cut back and clear away

Begin by cutting back any climbing plants or vines. While it may feel counterintuitive, this step is essential. Clearing away plant growth allows you to inspect the structure thoroughly and prevents stems from trapping moisture against the wood.

• Trim back climbers like clematis, honeysuckle and jasmine to promote healthy regrowth.
• Remove dead leaves and any accumulated organic matter from the base of the trellis.

This is also a chance to reshape overgrown plants and tidy the visual lines of your garden.

Step 2: Inspect the posts and fixings

Check the entire structure for signs of damage or movement.

• Ensure the posts are still firm in the ground and free from rot at the base.
• Look out for loose screws or fixings and tighten them where needed.
• Replace any rusted hardware or degraded timber components.

A sturdy foundation is key to weathering winter storms and supporting future growth.

Step 3: Clean the surface

Moss, algae and dirt can build up on timber surfaces during autumn, accelerating decay and making paint finishes less effective. A gentle clean helps preserve the wood and prepares it for any refinishing.

• Use a soft-bristled brush or sponge with warm water to gently the panels.
• Avoid harsh power-washing which may damage the wood fibres.
• Rinse with clean water and allow the panels to dry fully before moving on.

Step 4: Refresh the finish

If your trellis panels are painted or stained, winter is a smart time to touch up any worn areas. Exposed timber is more vulnerable to moisture ingress and frost damage.

• Sand back any peeling paint or flaky areas with fine sandpaper.
• Reapply paint, stain or wood preservative as needed – choose from our range of specialist paints and finishes formulated for exterior garden joinery.
• Focus on panel tops and edges where water tends to settle.

For a low-maintenance solution, consider thermally treated timber used in many of our prestige trellis designs. Its stability and durability are ideal for winter weather.

Step 5: Add a layer of protection

For an extra layer of defence against winter moisture, apply a breathable wax treatment or clear wood protector.

• These products help repel rain while still allowing the timber to breathe.
• We have found that wax products can help painted trellis keep its elasticity for longer to help prevent flaking.
• Ideal for trellis in shaded or damp-prone areas where drying time is slower.

Choose finishes designed for outdoor use to ensure long-lasting performance and compatibility with any existing treatments.

Step 6: Plan ahead for spring

Once your trellis is cleaned, secured and sealed, take a moment to plan any enhancements for spring. Consider adding additional trellis panels for climbing plants, privacy or zoning. A well-maintained trellis not only looks beautiful but also supports healthy growth when warmer days return.

Winter-ready garden, year-round style

Caring for your trellis panels during the colder months doesn’t have to be a chore. With these expert tips, your garden structures will stay strong, stylish and ready for another season of use. Whether you’re protecting a single decorative panel or a full run of privacy screens, a little winter preparation makes all the difference.

Explore our full range of trellis panels and outdoor paints and finishes to keep your garden looking its best throughout the year.

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