Top 5 Crops for a Damp Scottish Garden

Most gardens have one patch that stays damp long after the rest has drained: a low point, a spot under a downpipe, a hollow. These five crops suit that kind of ground, so long as it's damp and not waterlogged.

Damp, clay, shade and waterlogged are different problems

A damp bed holds moisture longer than the rest of the garden. That's not the same as heavy clay, which also compacts and resists roots (see the heavy clay picks), and damp ground can get full sun all day, so it isn't the same as shade either (see the shaded garden picks). A damp bed on free-drainingSoil that lets water pass through quickly rather than pooling, so roots aren't sitting in wet ground after rain. Full definition → loam near a downpipe has no compaction problem, which widens what will grow in it.

It also isn't waterlogged. A bed that stays moist a day or two after rain and dries at the surface is damp. To test it, dig a hole about 30cm deep and fill it with water: if water is still standing a day later, or sits on the surface well after rain, the ground is waterlogged. Roots suffocate there whatever you plant, and a raised bed is the better fix (see raised beds vs ground growing and recovering a sodden garden).

Is this more of a Scottish problem?

In the west, yes. Average annual rainfall in the higher parts of the west Highlands is over 3,500mm, while the East Lothian, Fife and Moray Firth coasts get under 700mm. Scotland has also seen the greatest increase in rainfall of any UK nation, and autumn to early winter are the wettest months. Rainfall alone doesn't tell you how often your own garden has a damp patch, since slope and drainage matter too, but a west-coast or Highland garden starts from a wetter baseline, so a damp corner is worth planning for rather than fighting. See the Scotland climate guide.

Rhubarb: for ground that's moist but not waterlogged

Rhubarb wants an open, sunny site with fertile, moisture-retentive soil, and it's a long-lived perennial that needs little once established. It needs plenty of space, forming a leafy clump 1.5m wide or more. Plant crownsThe base of a perennial plant where roots and shoots meet, often sold and planted as a ready-made dormant plant rather than grown from seed. Full definition → from autumn to early spring, or buy a potted plant. Don't harvest any stems in the first year after planting and only a few in the second; from the third year you can take up to a third of the stalks at a time. Never eat the leaves, which contain poisonous oxalic acid, only the stalks.

The limit is waterlogging: waterlogged soil or a very wet season can cause the crown to rot, which is the root rot risk. If the ground floods, lift the crown and move it to a better-drained site, or use a raised bed or container. MulchA layer of material spread over the soil around plants to suppress weeds, retain moisture, and improve soil structure as it breaks down. Full definition → around the plant but not over the crown, because mulch over it traps moisture and invites rot. In a container, do not stand the pot in a saucer of water. Timperley Early is the AGMThe RHS's Award of Garden Merit: a UK-wide trials award for reliable performance, not a Scotland-specific recommendation. Full definition → variety for an early crop; the rhubarb varieties guide covers the rest.

Land cress: for the wettest corners

Land cress (Barbarea verna) is listed for moist but well-drained or poorly-drained soil, which rhubarb doesn't share. It also takes acid, alkaline or neutral soil, in clay or loam, in full sun or partial shade, and gives a peppery, watercress-like leaf for salads. It's a brassicaThe cabbage family: cabbage, kale, broccoli, cauliflower, Brussels sprouts, kohlrabi, swede, turnip and more, sharing the same pests, diseases and rotation rules. Full definition →, so damp, often acidic ground can favour clubroot, and slugs like the soft seedlings. Sow a small patch first to see how it does in your ground.

Celery: a vegetable that needs moisture

Celery needs plenty of moisture throughout the season: the soil should never be allowed to dry out, and it wants fertile, moisture-retentive ground, not a site where soil dries out quickly. That makes it a vegetable that suits a damp corner. Sow indoors between mid-March and early April, and plant out about ten weeks later, in late May or early June once frost has passed, in a block 23cm apart each way so the plants shade each other. It's also a hungry crop, so dig in plenty of well-rotted manure or garden compost before planting. Stalks turn stringy if it ever dries out, and it needs feeding through the season. Its soft young growth is a slug target, so protect it early. If celery proves fussy, celeriac is a relative with a similar liking for moisture-retentive soil. See the celery varieties guide.

Sorrel: a perennial leaf for moist soil

Sorrel grows well in fertile, moisture-retentive soil in full sun or partial shade, forming clumps about 50cm tall and wide with a sour, lemony leaf. It's easy from seed sown indoors or outside. If your soil is poor or very free-draining, mix in well-rotted organic matter. Common sorrel is rated H7The RHS's H1a–H7 scale for how much cold a plant can survive outdoors, H1a being tender indoor-only and H7 hardy anywhere in the UK. Full definition →, hardy in the severest UK winters. See the sorrel varieties guide.

Chervil: for a damp corner with some shade

Chervil does best in a cool, lightly shaded spot, in the ground or in a container. Sow outdoors from April to August, 1cm deep in rows 30cm apart, and thin to 15cm. It's a soft, short-lived herb that flowers quickly in hot weather, so sow small batches regularly. It can suffer when transplanted, so sow it where it will grow. It won't fill a bed, but it suits a damp corner that gets some shade.

What didn't make the list

Watercress is classed as an aquatic and bog plant, so it needs a bog garden or pond margin rather than an ordinary damp bed. Ordinary mint has a damp-loving reputation, but it only tolerates a range of soil types. Slugs favour damp ground whatever you plant, so protect soft seedlings early.

Common questions

Sources