A garden within earshot of the sea is a gift, but it comes with conditions attached. Salt-laden wind, free-draining soil that forgets rain within the hour, and long stretches of bright, punishing light in summer all conspire against the lush borders you might have grown inland. The good news is that the plants that thrive in these conditions are some of the most beautiful and architectural you can grow — and once established, they need remarkably little from you.

Why Seaside Gardens Reward a Different Palette

The key is to work with the site rather than fight it. Plants that evolved on cliffs and dunes have adapted to wind, salt and drought, so they arrive with their own survival kit: fleshy leaves that store water, silver foliage that reflects light and shrugs off salt, and tough, narrow blades that bend rather than snap.

Equally important is soil preparation. Most coastal plots are sandy, gravelly or thin over rock, which means water and nutrients vanish quickly. Before planting anything, dig in plenty of well-rotted organic matter — garden compost, leafmould or spent mushroom compost — across the whole bed rather than just the planting holes. This improves water retention without creating the boggy, poorly drained conditions that Mediterranean plants hate. A generous mulch of gravel or horticultural grit afterwards will suppress weeds, keep the collar of each plant dry, and set off silver and grey foliage beautifully.

Ornamental Grasses for Movement and Resilience

If you plant only one group of plants for a coastal garden, make it grasses. They sway in the wind instead of shredding, and most are content with little water once their roots are down. Blue fescue (Festuca glauca) makes tight, powder-blue tufts that look superb edging a gravel path and will tolerate poor, stony ground without complaint. Pheasant's tail grass (Anemanthele lessoniana) is more generous, forming arching fountains of green that turn copper and orange in autumn and hold their colour through winter.

For something taller and more dramatic, try Calamagrostis 'Karl Foerster', whose stiff, upright stems bring structure and rustle agreeably in a sea breeze. Smaller Carex varieties, such as bronze-leaved Carex comans, work well in containers by a front door where salt spray is fiercest. Cut most deciduous grasses back hard in late February or early March, just as new growth appears, and they will reward you with a clean flush of foliage by early summer.

Succulents and Silver Foliage for Dry, Sunny Spots

Succulents are made for the seaside. Their thick, waxy leaves hold water through the driest weeks, and their sculptural shapes look wonderful against gravel or stone. Sempervivum (houseleeks) form neat rosettes that spread steadily into a carpet and cope with wind, salt and neglect. Sedum — particularly the taller border types such as 'Herbstfreude' — offer flat heads of pink flowers in late summer that bees adore, followed by attractive seedheads that stand well into winter.

Where winters are mild, especially in the south-west and along the south coast, you can be bolder with tender succulents such as Aeonium and Echeveria, though they are safest in pots that can be moved under cover during a hard frost. Pair them with silver-leaved stalwarts: lambs' ears (Stachys byzantina), cotton lavender (Santolina), curry plant and sea holly (Eryngium). Their pale, felted or grey-green surfaces deflect glare and handle salt far better than soft, dark green leaves, which tend to scorch and blacken in coastal wind.

Evergreen Herbs: The Hardworking Backbone

Mediterranean herbs are the quiet heroes of the coastal garden. Rosemary, thyme, sage, oregano, winter savory and bay all combine good looks with useful harvests, and they actively prefer the lean, gritty conditions a seaside plot provides.

• Rosemary makes a superb informal hedge or windbreak, and upright forms will tolerate quite exposed positions once established.
• Thyme is ideal for planting between paving stones or along the edge of a gravel terrace, releasing scent as you brush past.
• Sage and oregano both appreciate sharp drainage, so add grit to the planting hole if your soil holds any moisture at all.
• Bay clipped into a standard or cone gives year-round structure and can be moved into a pot if space is tight.

Trim herbs lightly after flowering rather than cutting hard into old wood, which many of them resent. A summer chop that removes about a third of the growth keeps them bushy and stops rosemary and lavender from becoming leggy and bare at the base.

Planting, Watering and Long-Term Care

Autumn is the best time to plant in coastal gardens, giving roots a chance to settle while the soil is still warm and before winter gales arrive. Water new plants thoroughly for their first summer — this is the one period where you must be diligent — then ease off gradually as they establish.

Once settled, most of the plants described here will manage on rainfall alone, though a deep soak during an extended dry spell will keep them looking their best. Resist the temptation to feed generously; rich, soft growth is exactly what wind and salt will damage. A light scatter of general-purpose fertiliser in spring is plenty.

Finally, think about shelter. A woven hurdle, a slatted fence or an informal hedge of rosemary or Escallonia on the windward side will filter the worst of the salt and transform what you can grow. Even a low barrier makes a measurable difference a few metres in, and it shelters you as much as the plants.