Why the Seaside Changes Everything

Gardening within earshot of the waves is a peculiar pleasure. You get mild winters, brilliant light and a growing season that often stretches well into November. What you do not get is an easy ride. Salt-laden wind scours exposed leaves, scorching them brown on the seaward side, while free-draining sandy soil means nutrients wash straight through the root zone just when plants need them most. Add a late, cold spring and the occasional summer sea fret rolling in off the water, and it becomes clear that variety choice matters far more here than it does inland.

Raised beds are a genuine advantage on the coast. You control the growing medium, you can raise the soil above the worst of the salt splash, and you can work the bed without fighting compacted shingle or heavy clay. Fill them with the right plants and a coastal plot can be remarkably productive.

Making a Raised Bed Work With the Wind

Before sowing a single seed, think about shelter. A windbreak of woven hurdles, willow screening or netting at roughly 1.2 metres tall, set two metres back from the bed, will cut salt carry and wind speed without creating the damaging turbulence a solid wall produces. Living windbreaks such as escallonia or sea buckthorn do the same job over time.

Build beds at least 25cm deep, and make the mix generous — roughly a third well-rotted manure or garden compost, a third topsoil, a third multipurpose compost with added grit for drainage. Then mulch every spring with a 5cm layer of compost. If you gather seaweed from the strandline, rinse it in a bucket of fresh water first and let it sit through a rain shower before spreading it, so you are adding trace elements rather than a dose of salt. Water little and often in summer, ideally with a drip line, because raised beds on sandy ground dry out fast.

Leaf Crops That Shrug Off the Spray

Leafy crops are the backbone of a seaside bed, and the chard family is unshakeably tough. Bright Lights chard is the standout: rainbow stems, cut-and-come-again leaves, and a constitution that tolerates wind, salt and poor soil. In mild coastal gardens it will often stand right through winter with a little fleece for the coldest nights. Grow it 30cm apart and harvest outer leaves only.

Kale is the other stalwart. Red Russian is sweet and tender when picked young, while Cavolo Nero stands like a small palm and keeps cropping until spring. Both cope with salt far better than cabbage or broccoli, which tend to sulk in exposed positions.

• Perpetual spinach — reliable, productive and slow to bolt
• Sea kale — a native coastal perennial; blanch the spring shoots for a real delicacy
• Marsh samphire — needs a damp, salty corner, but rewards you with a summer crop
• New Zealand spinach — a sprawling substitute for spinach in hot, windy summers

Roots That Relish Sharp Drainage

Here is the good news: the free-draining soil that frustrates your lettuce is exactly what root crops want. Beetroot is the seaside gardener's friend because it is salt-tolerant, quick and forgiving. Boltardy remains the most dependable, with Pablo and Detroit Dark Red close behind. Sow in modules and plant out to avoid the wind scattering your seed.

Carrots do well too, especially where carrot fly is kept at bay by the breeze. Choose Flyaway or a reliable Nantes type, and keep the bed watered evenly to prevent splitting. Parsnips such as Tender and True enjoy the deep, loose tilth of a raised bed and will sit happily in the ground until you want them. Leeks and bulb onions also take salt in their stride and give you something to harvest in the lean months.

Early Potatoes and Sturdy Legumes

Potatoes are surprisingly tolerant of coastal conditions, and early varieties avoid the worst of any late blight. Plant Rocket, Swift or Lady Christl in late March under fleece, and you can be lifting new potatoes in June — a genuine morale boost in a garden where little else is ready.

Broad beans are the legume of choice. Autumn-sown Aquadulce Claudia gives you pods in early summer, while dwarf The Sutton needs no staking and copes with wind far better than tall runners. French and runner beans will grow, but site them in the most sheltered corner, or accept that the first flush of flowers may drop in a gale.

Planting for Wind, Salt and Succession

A few honest rules will save you heartache. Lettuce, celery, outdoor tomatoes and cucumbers all resent salt burn and drying wind; if you must grow them, use a cold frame or a sheltered courtyard. Sow little and often rather than in one grand gesture, since coastal weather swings about, and keep a roll of fleece to hand for late frosts in May.

Feed fortnightly with a diluted liquid seaweed tonic through summer, top up your mulch in July, and clear spent crops promptly so the bed never sits empty. Sow a green manure such as field beans or grazing rye over winter to hold both soil and nutrients in place. Do those things, and your raised beds will earn their keep from March right through to the first proper gale of autumn.