Coastal gardens are among the most exhilarating places to plant, and among the most demanding. Wind that has crossed miles of open sea arrives loaded with salt, and it arrives fast. On exposed headlands and clifftops, or even a few streets back from a seafront, that combination of salt spray, desiccating wind and thin, free-draining soil shapes everything that grows. The good news is that a coastal garden need not be a compromise. With the right planting palette and a little strategic shelter, it can be lush, textural and genuinely resilient.

Read the Site Before You Plant

Every coastal garden has its own microclimate, and the differences matter more here than almost anywhere else. Before ordering a single plant, spend time working out where the wind actually comes from, how salt-laden it is, and where the calm pockets sit.

Look for the prevailing wind direction and note how it funnels between buildings, through gaps in hedges and along paths. A garden one row back from the front may escape the worst of the salt, while an exposed corner can be stripped bare even by a modest onshore breeze. Aspect matters too: south and west-facing plots warm up quickly but dry out fast, while north-facing coastal gardens stay cooler and hold moisture for longer.

Soil is usually the next surprise. Coastal soils are often thin, sandy or gravelly, low in organic matter and quick to drain, so anything that resents drying out will struggle. Dig a few test holes, check depth to subsoil or rock, and note whether the ground stays damp after rain or sheds water immediately.

Build Shelter Before You Build Borders

The single most effective thing you can do in an exposed coastal garden is to slow the wind before it reaches your plants. A solid wall seems appealing, but it creates damaging turbulence on its lee side. Instead, aim for a semi-permeable barrier that filters the wind rather than blocking it.

A shelter belt of tough, salt-tolerant trees and large shrubs will do this job beautifully. Plant it in staggered, layered rows so that wind is progressively broken down rather than deflected. Native and near-native choices work hard here:

• Sea buckthorn (Hippophae rhamnoides) for silvery foliage and spiny, wind-proof structure.
• Hawthorn and blackthorn for dense, wildlife-friendly hedging that shrugs off exposure.
• Holm oak (Quercus ilex) and holly for evergreen backbone where space allows.
• Griselinia littoralis and Escallonia for fast-growing, glossy-leaved screens.

Even a low, 1–1.5 metre shelter hedge can transform the planting opportunities behind it. Allow time for establishment, and resist the temptation to clip too hard too soon; dense, bushy growth is what you need.

Salt-Tolerant Shrubs for Structure

Once shelter is under way, shrubs provide the permanent architecture of a coastal garden. Prioritise evergreens for year-round bulk and choose plants with naturally tough, often leathery or hairy leaves that resist salt burn.

• Olearia and Brachyglottis for daisy-like flowers and silver-grey foliage.
• Hebe (now largely reclassified as Veronica) for compact, wind-resistant forms.
• Rosemary and cotton lavender (Santolina) for aromatic, drought-tolerant Mediterranean character.
• Tamarix for feathery, wind-blown elegance and tolerance of the harshest spots.
• Fuchsia magellanica for colour that returns reliably even after cutting back.

Group shrubs in generous drifts rather than isolated specimens. Massed planting shelters itself, shades its own roots and looks far more convincing than a scattering of lonely individuals.

Grasses, Perennials and Ground Cover

Sturdy grasses are the unsung heroes of exposed gardens. They move with the wind instead of fighting it, and their deep roots help bind light, sandy soils. Use them in broad sweeps to soften hard landscaping and create movement.

• Blue fescue (Festuca glauca) for tight, steely-blue clumps at the front of borders.
• Anemanthele lessoniana for graceful, ever-changing colour.
• Stipa tenuissima for fine, shimmering texture in sheltered pockets.
• Sea thrift (Armeria maritima) for neat pink pom-poms that love salt and drought.
• Eryngium and sedum for architectural seedheads and late-season nectar.

For ground cover, think in terms of mats and carpets. Thymus, Campanula, Nepeta and low-growing Geranium will knit together across thin soils, suppressing weeds and protecting the surface from wind erosion. Mulch around new plantings with gravel or bark to conserve moisture and keep roots cool.

Soil, Watering and Seasonal Care

Thin coastal soils benefit enormously from organic matter, but it washes through sandy ground quickly. Little and often is the rule: top-dress with well-rotted compost each spring, and consider planting into generous pockets of improved soil rather than trying to amend an entire border at once.

New plants need careful watering through their first two summers, even drought-tolerant ones. Once established, most coastal plantings need very little supplementary water, which is one of the quiet pleasures of gardening by the sea.

Prune lightly and patiently. Hard cutting in an exposed garden can leave plants vulnerable to wind-rock and scorch; a gentle trim in spring, after the worst of the gales, keeps shrubs compact without stripping them of protective foliage. Replace losses with tougher, better-adapted species each season and the garden will grow steadily more robust rather than more fragile.

Designing with the Wind, Not Against It

The best coastal gardens accept their conditions and turn them into character. Silver and grey foliage, glossy evergreens, swaying grasses and low, wind-shaped shrubs are not just survivors; they are the palette that makes seaside planting unmistakably beautiful. Work with the salt, the light and the movement, and an exposed plot can become the most atmospheric garden you will ever make.