Home Garden Coastal planting

Coastal planting

Plants that like to be beside the seaside

Living on the coast can be a blessing and a curse. On one hand, the sea is warmer than the land in winter, so very hard frosts won’t be as severe.

Berberis atropurpurea (purple barberry) and Acanthus mollis (bear's breeches)
Berberis atropurpurea (purple barberry) and Acanthus mollis (bear’s breeches) will tolerate a coastal environment

On the other, offshore breezes cool in summer, bringing mists. In winter, bitter easterly/north-easterly winds bring snow showers in from the North Sea on the East coast – and the threat of floods.

On the West, you have the perpetual battering of storms coming in off the Atlantic. All coasts have the dreaded curse of salt.

There’s not many plants that relish a saline environment.

Don’t fight it – go with it. As a general rule, succulent or small greyish leaves are a decent indicator of salt tolerance. In the following recommendations, I’ve assumed a free-draining, sandy soil, with an east-facing exposed garden.

All plants are hardy. Check other members of the plant’s family – there are hundreds of varieties of aster or heather, for example.


Annuals and biennials

Ammi majus
Ammi majus – soft, airy flower heads

False bishop’s weed (Ammi majus): fern-like, divided leaves and large, branched umbels of small creamy-white flowers, 0.5-1 metres.

Viper’s bugloss (Echium vulgare): erect, bristly biennial to 75cm, with lance-shaped, hairy leaves and dense cylindrical spikes of bell-shaped violet-blue flowers in early summer.

Californian poppies
Californian poppies

Californian poppy (Eschscholzia): annual, dissected, blue-green foliage and single or semi-double flowers, in cream, yellow, orange, pink and red; prolific self seeders, see featured picture above.

Rose campion (Lychnis coronaria): biennial, with silvery-grey felted leaves and lax sprays of long-stalked, vivid rose-purple flowers.


Herbaceous perennials

Achillea Summer Berries
Achillea Summer Berries, one of the paler colours grown from seed

Bear’s breeches (Acanthus mollis): glossy, lobed foliage and tall white/purple flower spikes, 1-1.5 metres.

Yarrow (Achillea filipendulina): many varieties, eg Cloth of Gold grows to 1.8m, with large, flattened heads of bright yellow flowers.

Anenome (A. blanda var. rosea) Pink Shades: bronze-tinged lobed leaves, flowers 3cm wide have 9-14 narrow pale pink petals, 0.1-0.5m. A. nemorosa also suitable.

Sicilian chamomile (Anthemis punctata subsp. cupaniana): woody-based, evergreen perennial forming a loose mat to 30cm tall, with finely cut silvery foliage and yellow-centred white daisies.

Eryngium The Hobbit
Eryngium The Hobbit

Italian aster (Aster amellus): King George is a bushy, upright herbaceous perennial to 60cm, with dark green, oval leaves and yellow-centred, violet-blue daisies.

Thrift (Armeria maritima): mat-forming evergreen perennial with dense, needle-like leaves and erect flower stems to 15cm, bearing clusters of cup-shaped pink flowers.

Tussock bellflower (Campanula carpatica): clump-forming perennial to 30cm, with violet-blue or white flowers.

Blue ball of the Echinops flower
Blue ball of the Echinops flower

Eryngium (sea holly): steely blue thistle-like flower structures of dwarf The Hobbit (30cm) or pale grey of Miss Willmott’s Ghost, a favourite of Gertrude Jekyll (up to 1m).

Echinops (globe thistle): Metallic blue orbs, cobwebby much-divided leaves, flowers beloved of insects, up to 120cm.


Shrubs and small trees

Cornus Midwinter Fire
Cornus Midwinter Fire, silver birch and me at RHS Harlow Carr’s Winter Walk

Japanese laurel (Aucuba) Golden King: large glossy leaves blotched with gold, dark purple flowers in spring, 1.5-2.5 metres. (Any of the laurel cultivars are very resistant to salt and air pollution, which is why they’re a common feature in the urban landscape.)

Purple Japanese barberry (B. thunbergii f. atropurpurea): rounded, deep reddish-purple leaves which become deep red in autumn; small red-tinged pale yellow flowers followed by glossy red berries, 1-1.5 metres.

Heather (Calluna or Erica species): compact evergreen with red-brown foliage, becoming bright orange-red in winter. Flowers purplish-pink, in spikes.

Laurels
Laurels. Picture; Bill Docherty’s Nursery and Plant Centre

Red-barked dogwood (Cornus spaethii): deciduous, suckering shrub with stems bright red in winter, variegated leaves, flowers cream in flattish clusters, berries white, 2.5-4 metres.

Four-stamen tamarisk (Tamarix tetrandra): lax, deciduous shrub/small tree with arching, almost black branches, minute green scale-like leaves and large plumes of light pink flowers in late spring, 2.5-4 metres.