Key takeaways
- Plant the windbreak first and design the rest of the garden in its shelter
- A hedge or slatted fence that filters wind works far better than a solid wall
- Put the toughest salt-tolerant shrubs on the seaward edge to protect everything behind
- Keep tender and precious plants in the most sheltered part of the garden
- Gravel and raised beds suit fast-draining sandy coastal soil
- Hose salt off evergreens with fresh water after a winter gale
A good coastal garden starts with shelter. Get the windbreak right and a seaside plot can be wonderful, with soil that warms early and mild winters for tender plants. Get it wrong and salt and wind will flatten almost anything you plant.
This guide covers the layout of a seaside garden: reading your exposure, building shelter, planning salt zones and choosing surfaces. For plant lists, our guide to salt-tolerant plants for coastal gardens does that job. If your garden is windy but nowhere near the sea, see our guide to exposed garden plants and windbreaks.
How to read your coastal exposure first
Work out where the wind and salt come from before you plant anything. Exposure is a mix of wind direction, strength, salt and the lie of the land.
On most British coasts the prevailing wind comes from the south-west. East coasts can take their worst hits from cold north-easterlies off the North Sea. Stand in the garden on a windy day and watch where the wind speeds up. It rushes through gaps, over the top of slopes and round the corners of the house.
Look at existing shrubs and trees too. The way they lean shows you the prevailing wind. The side facing the sea that looks brown and burnt is your salt edge.
Leaning, salt-burnt shrubs show you which way the worst wind blows. Read the plot like this before you draw a single bed.
Why a hedge beats a solid wall by the sea
A solid wall is the worst windbreak you can build. Wind can’t pass through it, so it rushes over the top and tumbles down the other side as strong, swirling gusts. That lands right where you wanted calm.
A hedge or slatted fence that lets roughly half the wind through works far better. The air slows as it passes through, so you get a long, calm pocket instead of turbulence. A good windbreak can reduce wind for a distance of up to about ten times its height. A 2m hedge can shelter a large part of a typical garden.
Warning: Avoid a solid close-board fence or high wall on the seaward boundary. It looks like protection, but plants just behind it get battered by gusts. Make the windward edge permeable.
Leafy shrubs bend and filter the wind, so the planting behind them stays calm instead of getting battered.
Choosing between hedges, shelter belts and slatted fences
A living hedge is the best long-term choice. It repairs itself and gets better every year. A slatted fence is the quick fix that gives shelter while the hedge grows.
| Windbreak | Height | Salt tolerance | Best use |
|---|---|---|---|
| Escallonia or griselinia hedge | 1.5-3m | Very good | Main seaward boundary |
| Mixed shelter belt (tamarisk, hawthorn, sycamore, pine) | 3m and up | Good | Large exposed plots |
| Slatted timber fence with gaps | 1.8-2m | Good if treated | Instant shelter while a hedge grows |
| Woven willow or hazel hurdles | 1.2-1.8m | Fair | Short-term screens, inner divisions |
| Solid wall or close-board fence | Any | Good | Only in the sheltered heart, as a sun trap |
Keep solid walls for the sheltered middle of the garden. Once the hedge outside is doing its job, a sunny wall becomes a warm spot for tender plants. Our escallonia growing guide covers planting and trimming the classic seaside hedge.
A gappy timber fence gives instant shelter. Plant a hedge behind it to take over in a few years.
How to build a layered windbreak
Several rows of different heights calm the wind better than one tall hedge. Wind lifts cleanly over a single even wall, but loses strength at every step of a layered one.
On a larger plot, plant three tiers from the sea inwards:
- Front row: low, tough shrubs such as tamarisk or hebe, about 1-1.5m tall, to take the first salt.
- Middle row: escallonia or griselinia at 2-3m.
- Back row: hawthorn, sycamore or pine where you have room.
Plant small. Young bare-root whips or small pot-grown plants root quickly and cope with wind. Big plants rock loose and often die. Set hedging about 45-60cm apart, stake low, and shelter new plants with windbreak netting for their first winters. Plant in autumn or early spring, when the soil is moist. On a bigger plot, the back row can become a little pocket woodland for wildlife too.
Low shrubs, then a flowering hedge, then trees. Each layer takes some of the wind before it reaches the next.
How to design salt zones in a seaside garden
Plan the garden in zones, from tough at the front to tender at the back. Salt does most damage on the seaward edge and much less behind a dense hedge.
The front line is your sacrifice zone. Plant only the toughest salt-tolerant shrubs here, such as griselinia, escallonia and tamarisk. They take the hit so everything else doesn’t.
The middle ground is the working garden. With the wind filtered and much less salt, this is where borders, lawn and paths belong.
The most sheltered spot is your showcase. In mild coastal areas, especially the south-west, a sheltered corner can grow agapanthus, echiums and other plants that struggle inland.
Gardener’s tip: After a winter gale, hose salt off evergreens with fresh water within a day or two. Salt left on leaves keeps drawing moisture out long after the storm.
How to create a sheltered seating area by the sea
Put the seat in the lee of the windbreak and wrap it in walls or hedging. Even a low wall around a seat makes a big difference to how warm it feels.
A slightly sunken seating area, a step or two below ground level, is calmer still. Wind skims over the top. Ring it with a low dry-stone wall and a clipped hedge of griselinia or escallonia. Make sure it drains well, with a gravel soakaway or a slight fall, so it doesn’t fill with rain. Our outdoor seating ideas cover heights and materials.
Sunk a little below ground and ringed with stone and hedging, a seating area stays calm even in a stiff sea breeze.
Using gravel and shingle in a coastal garden
Gravel and shingle suit the coast in looks and in practice. They drain fast, never waterlog and let seaside plants seed about naturally.
Lay gravel about 5cm deep over a permeable membrane. Or spread it straight onto improved soil if you want plants to self-seed into it. Sea holly, red valerian, sea kale and grasses such as Stipa and blue fescue all thrive in gravel and cope with salt and wind. Our guide to growing sea holly explains how to raise it. Weathered driftwood and pebbles finish the look.
Don’t take pebbles, sand or shingle from the beach. Buy them from a supplier instead.
Grasses, sea holly and red valerian seed happily into shingle and shrug off salty wind.
Raised beds and soil care on sandy coastal soil
Many coastal gardens sit on free-draining sandy soil. It warms up early in spring, which is a real bonus, but it loses water and nutrients fast.
Raised beds let you build good soil where you need it most, such as for veg and herbs. Fill them with topsoil and plenty of garden compost. Site them in the shelter of a hedge or wall.
For the rest of the garden, dig in garden compost, leaf mould or well-rotted manure every year. Seaweed is a traditional coastal soil improver. Rinse off excess salt before using it, and check local rules before collecting it from a beach. Our guide to improving sandy soil covers timing and amounts.
Tucked behind a wall and hedge, raised beds of rich compost hold water far better than the sand around them.
Common mistakes in coastal garden design
- A solid wall or fence on the seaward edge. It creates gusts just behind it. Make the windward boundary a hedge or slatted fence.
- Planting borders before the shelter. Plant the windbreak first and give it a couple of seasons to settle.
- Treating sand like loam. Without organic matter, plants go thirsty and hungry. Mulch and add compost every year.
- Tender plants on the front line. Save precious plants for the most sheltered part of the garden.
- Planting big specimens. Large plants rock in the wind and fail. Small plants establish faster.
Frequently asked questions
How do I protect a garden from sea wind?
Filter the wind with a hedge or slatted fence rather than blocking it. A barrier that lets some air through slows the wind over a long distance behind it. A solid wall pushes wind over the top, where it crashes down as gusts.
What is the best windbreak for a coastal garden?
A living hedge of escallonia, griselinia or tamarisk is the best long-term windbreak. These shrubs cope with salt and grow back after storms. A slatted timber fence gives shelter while the hedge establishes.
How far inland does salt spray reach in a coastal garden?
It depends on exposure, but a dense hedge catches much of it. Gardens facing open sea in winter gales get the most. Plants sheltered behind a tough outer hedge see far less salt than those on the front edge.
What soil do coastal gardens have and how do I improve it?
Many coastal gardens have free-draining sandy soil that dries out fast. Dig in plenty of garden compost or leaf mould each year to hold moisture. Raised beds and a gravel mulch help too, and the soil warms quickly in spring.
Can you have a sheltered seating area in an exposed coastal garden?
Yes, put it in the lee of your windbreak and enclose it. A seating area set slightly below ground level, ringed with a low wall or hedge, is calmer still. Make sure it drains well so it doesn’t flood.
Shelter sorted? Fill the gaps with our pick of the best plants for sandy soil, or find more ideas in the garden design hub.
Our team produces practical UK gardening guidance from source research, contributor records and established horticultural practice. Editorial standards are overseen by Matt W.
