Why a shady corner makes a fine pond

Most pond guides begin with full sun, and for a blaze of water lilies that is sound advice. But a spot that sits in dappled shade for part of the day — beside a hedge, along a north-facing wall, under a mature shrub — makes an excellent wildlife pond. Cooler water holds its oxygen better through a hot July, and algae are slower to take hold. Shade also gives frogs, newts and insects somewhere to retreat when the sun is fierce. What you lose is the showy flowering of sun-lovers; what you gain is a steadier, more forgiving little habitat that needs far less fiddling.

Choosing the spot

The one firm rule is no overhanging trees. Leaves drop, rot, and load the water with nutrients that feed blanket weed and algae; roots can also puncture a liner from below. Aim instead for shade cast by something you can manage — a hedge, a fence, a shed, a wall — rather than by a canopy directly overhead. Beyond that, look for:

• Level ground, so the water sits evenly and the edges hide neatly
• A spot at least a metre clear of any hedge or wall, to dodge roots and rain shadow
• A view from a kitchen or study window, so you notice what turns up
• Somewhere within reach of a rainwater butt, if you have one
• Access for a wheelbarrow of spoil and a watering can — you will be carrying water

Digging in: shelves, depths and edges

A pond of about 1.5 metres by 1 metre is plenty for a small garden, and easy to manage. Dig it 45 to 60 centimetres deep in the middle — deep enough to stay liquid through a hard frost, so frogs and newts can overwinter in the silt — and then shape the most important feature of the whole project: a shallow shelf. Run a shelf 10 to 20 centimetres deep and 25 to 30 centimetres wide along at least one entire side. This is the ramp and landing stage. Frogs hop in and out, hedgehogs drink safely, dragonflies perch, and marginal plants sit at exactly the depth they like.

Mark the outline with a rope or hosepipe before you cut anything. Lift the turf in sods and stack it grass-side down to one side — it will make a useful edging later. Remove sharp stones, line the hole with a good underlay, then lay a butyl liner, leaving 30 centimetres of overlap all round. Tuck the excess into a shallow trench, fill with rainwater rather than tap water (tap water arrives rich in nutrients and phosphates), and let it settle for a week before planting.

Planting with natives that keep the water clear

Balance comes from plants, not from chemicals. Use baskets of plain loam, never compost or fertiliser, and plant generously but not to the point of crowding — aim for roughly half the water surface shaded by foliage by midsummer.

• Marginals for the shelf: brooklime, water mint, water forget-me-not, lesser spearwort, marsh marigold
• Oxygenators for the deep centre: hornwort and water starwort, which compete with algae and shelter tadpoles
• Damp ground around the rim: ragged robin, lady's smock, soft rush
• Worth avoiding: yellow flag iris in a small pond — it is magnificent and far too vigorous — and anything labelled invasive

Skim duckweed with a net rather than panicking about it, and leave a few stones and a small log pile at the edge. Refuges matter as much as water.

The wildlife that finds you, and keeping it balanced

Frogs usually arrive first, often within weeks, followed by pond skaters, water boatmen and diving beetles. Damselflies and dragonflies will hunt over the surface from the first summer, and birds will visit to drink and bathe if you leave one gently sloping, plant-free section of bank. Newts take longer and are a quiet thrill when they come. Resist fish entirely: they eat everything else, and a wildlife pond does not need them.

Once the plants establish, maintenance is light — top up with rainwater in dry spells, clear fallen leaves in October before they sink, and never feed the pond. Green water in the first spring is normal and usually clears itself as the plants grow away.

Keeping a nature journal

A pond rewards the habit of looking. Keep a plain notebook and pencil by the back door and jot a few lines each week: the date, the weather, the water's clarity, what is flowering, what is moving. Note the first frogspawn, the first damselfly, the night the water boatmen appeared. Sketch badly and without apology. After two or three years you will have something no field guide can give you — a record of one small patch of water, in one garden, through the seasons, and the quiet proof that shade was never the obstacle you feared.