How to Prepare Your Garden for Winter in North Wales

North Wales winters can be wet, windy, and unpredictable — especially along the coast. Getting your garden ready before the cold sets in protects your plants, saves work in spring, and keeps things looking presentable through the darker months.

Here’s the full winter preparation checklist, broken down by job.

Lawn

• Give the lawn a final mow in October/November — leaving it at around 4–5cm height
• Aerate with a fork or hollow tine aerator to prevent waterlogging
• Apply autumn/winter lawn feed (high potassium, low nitrogen)
• Scarify if needed — September/October is the last viable window
• Overseed bare patches while the ground is still warm
• Stop mowing once growth halts — usually November in North Wales
• Avoid walking on frosted lawn — it damages the grass cells

Borders and Beds

• Cut back dead perennial stems — but leave some for wildlife and structural interest
• Remove annuals that have finished
• Weed borders thoroughly — easier now, harder in spring when everything competes
• Apply a thick layer of mulch (bark or compost) to protect roots and suppress weeds
• Lift and store tender bulbs (dahlias, cannas) before the first frost
• Plant spring bulbs now — daffodils, tulips, and alliums all go in autumn

Hedges and Shrubs

• Final hedge trim before end of October — don’t trim after that as new growth won’t harden before frost
• Check hedges for nesting birds before trimming (legally required March–August, but good practice year-round)
• Prune deciduous shrubs once leaves have dropped — easier to see structure
• Protect tender shrubs with horticultural fleece if exposed to frost

Trees

• Autumn is a good time to have trees inspected for damage or disease — issues are easier to spot without leaves
• Remove deadwood safely before winter storms make it hazardous
• Stake any newly planted trees before autumn winds arrive

Hard Surfaces

• Pressure wash patios, paths, and driveways before algae builds up over winter
• Clear gutters and drains of autumn leaves
• Check decking for rot or loose boards before wet weather makes it slippery
• Apply anti-slip treatment to wet decking if needed

What to Leave for Wildlife

Not everything needs to be cut back. Leave some seed heads on perennials — they feed birds through winter. Hollow stems provide shelter for solitary bees. A small leaf pile in a corner creates habitat for hedgehogs and beetles.

In North Wales, garden biodiversity matters — a tidy garden isn’t always a better one.

North Wales-Specific Tips

• Coastal areas (Llandudno, Rhos on Sea): protect plants from salt-laden winds with windbreaks or fleece
• Betws-y-Coed area: expect first frosts earlier — start preparation in September
• Heavy clay soils (common in the Conwy valley): mulch deeply to prevent surface frost cracking