Coastal gardens in Mumbles and Gower: trees that cope with salt and wind

Published 2 November 2026

Gardens on the Mumbles headland, around Langland and Caswell, and out along the south Gower coast get a lot going for them: sea views, mild winters and long growing seasons. They also get the south-westerlies straight off the bay, and with them salt spray. Some trees shrug that off. Others brown on one side every winter and never really settle. This guide covers which trees and hedges cope best, how to give a garden shelter that actually works, and what to check with the council before you plant, prune or take anything out.

What salt and wind do to garden trees

The RHS describes coastal gardens as having to cope with “salt-laden winds”, and notes that salt spray can travel some way inland and affect plants that aren’t salt-resistant. Wind on its own also strips moisture out of leaves. The result is what gardeners call wind scorch: leaves with brown, dried edges, or leaves that turn brown and dry all over.

According to the RHS, scorch:

• usually shows up in winter
• is worst in exposed spots and on the windward side of the plant, which on this stretch of coast is usually the side facing the sea
• hits evergreens hardest, especially large-leaved ones, and plants in pots are at particular risk

If you see a tree or hedge that is green on the sheltered side and brown on the side facing the bay, that’s the pattern.

Trees and shrubs that cope with coastal exposure

The RHS keeps a list of windbreak and shelterbelt plants and marks the ones that are “tolerant of coastal sites”. From that list, the ones you’re most likely to come across or consider in a Mumbles or Gower garden include:

• Trees: sycamore, common alder, Italian alder, hornbeam, white willow and rowan (mountain ash)
• Evergreen trees: holm oak, Monterey pine, European black pine and shore pine
• Large shrubs and hedging: hawthorn, Midland hawthorn, blackthorn, sea buckthorn and elder
• Evergreen shrubs: Elaeagnus × ebbingei, firethorn (pyracantha), Italian buckthorn and gorse
• Smaller shrubs: tamarisk and several roses, including Rosa rugosa and the Scotch rose

The RHS also picks out griselinia, whose thick, waxy leaves help it stand up to exposure, and tamarisk, whose tiny scale-like leaves lose less water in the wind. Griselinia is a common hedge in Mumbles already. The Wildlife Trusts add escallonia, holly, oleaster and rowan as good coastal hedge and shelterbelt plants, and point out that plants with small, leathery, silvery or glossy leaves generally handle salty wind best.

Sycamore is worth a mention on its own. It is one of the most common large trees in Mumbles gardens, and it’s on the RHS coastal-tolerant list, which is part of why so many mature ones are still standing on exposed plots. Big sycamores close to houses still need looking after, though, and our teams are often asked to reduce them rather than remove them. See our crown reduction page for how that works.

Building shelter that works

Most coastal gardens do better once something is taking the edge off the wind. The RHS advice on windbreaks is clear on a few points:

• Filter the wind, don’t block it. A barrier that lets through some wind, ideally filtering 50 to 60 percent, works better than a solid wall or close-boarded fence. Solid barriers push the wind over the top and create damaging eddies on both sides.
• Expect about ten times the height. A windbreak substantially reduces wind on its sheltered side for roughly ten times its own height. A 2m hedge gives you useful shelter for around 20m.
• Make it wider than the area you want to protect, or carry it round the sides, so the wind doesn’t just slip round the ends.
• Face the prevailing wind. In the UK that’s the south-west, which on Gower is usually the sea side anyway.
• Be careful with a solid line of evergreens. A very dense evergreen hedge can act like a wall. In a wider shelter belt, the RHS suggests alternating evergreen and deciduous rows.

While a living windbreak is getting established, woven hurdles or windbreak netting can do the job. The RHS notes that screens over 1.5m need heavy-duty fixings, which matters on an exposed headland.

Planting so it survives the first winters

The RHS and the Wildlife Trusts both recommend planting small, young plants rather than big container-grown ones, because young stock settles in and adapts better. Other RHS pointers:

• Plant deciduous trees and shrubs from autumn to early spring, and evergreens in spring.
• Mulch well. A thick organic mulch cuts down how fast the wind dries the soil.
• Water through long dry spells in the first season.
• Use tree guards where rabbits are a problem, which they often are near the cliffs and commons.

If a tree is already scorched or wind-damaged

For broadleaved evergreens, the RHS advice is to cut out scorched foliage in spring as growth starts again. It specifically warns against cutting back badly scorched conifers, because they often don’t regrow from damaged shoots. That’s one reason a browned conifer hedge on the sea side can’t always be brought back with a hard trim, and why some owners end up replacing it. Our leylandii and conifer removal page explains the options.

A tree that’s been leaning further after each winter, or has lost big limbs in a gale, is a different matter. That needs looking at properly rather than tidying up. Before cutting anything, also bear in mind that losing a big shelter tree can leave everything behind it more exposed.

Check before you plant, prune or fell

Being on the coast doesn’t change the rules, but much of this area is covered by them:

• Conservation areas. Mumbles is a conservation area (its boundary was expanded after a review in 2021), and so are Langland Bay and a string of Gower villages, including Rhossili, Port Eynon, Horton, Reynoldston, Llangennith, Penrice, Cheriton and Bishopston. Work on most trees in a conservation area needs six weeks’ notice to Swansea Council first. Our guide on whether you need permission to cut down a tree explains how it works.
• Tree Preservation Orders. Some coastal trees are protected individually. See our protected trees page.
• Gower National Landscape. Most of the peninsula is a National Landscape (formerly AONB). Our Gower tree work guide covers what that means for a garden.
• Nesting birds. Hedges and shelter belts are prime nesting spots, so time any big cut-back with our bird nesting season guide in mind.

How our teams can help

If you’re on the coast and something isn’t coping, our teams can look at what you’ve got, tell you what’s worth keeping, and handle reductions, removals and hedge work, including any council notice needed first. We cover Mumbles, Bishopston and the whole of Gower. Get a free, no-obligation quote.