Why a Wildlife Pond Beats Any Ornamental Feature

Few things bring a garden to life quite like a pond that is humming with activity. Frogs, toads and newts are among the most rewarding visitors you can encourage, not least because they earn their keep by devouring slugs, snails and other pests. In Britain, our common frog, common toad, smooth newt and palmate newt are all declining to some degree, largely through habitat loss. A well-built garden pond can genuinely make a difference, acting as a stepping stone between fragmented populations. The good news is that you do not need a large plot or deep pockets. What amphibians need most is clean water, native plants for cover and breeding, and damp, undisturbed places to hide nearby.

Siting and Sizing Your Pond

Amphibians are surprisingly fussy about location. Aim for a spot that receives at least some sunshine for part of the day, since this warms the water and encourages the algae and insect life that tadpoles feed on. At the same time, avoid full sun all day, as this encourages blanketweed. A little shade from a shrub or fence is ideal.

Depth matters more than surface area. A pond with a shallow shelf around the edge and a deeper central section of around 60cm (2ft) will suit most species. The shallow margins warm quickly in spring, which is where frogs and newts tend to spawn, while the deeper water gives creatures somewhere to retreat during frost and drought. Newts in particular like a gradual slope rather than a steep drop.

If you have small children or visiting grandchildren, a shallow pond with gently sloping sides is safer and still perfectly capable of attracting wildlife. Even a submerged half-barrel or an old butler sink can tempt a passing newt if the planting is right.

Getting the Water Right

Water quality is where many well-meaning ponds go wrong. The golden rule is simple: never use tap water to fill a new pond if you can avoid it. Rainwater collected in butts is far better, as mains water contains nutrients and chlorine that fuel algae. If you must use tap water, let it stand for a few days before adding plants or livestock.

Creating a natural balance is more effective than any chemical treatment. Follow these principles:

• Add a good mix of oxygenators such as hornwort and water starwort to keep the water clear.
• Use marginals like marsh marigold, water forget-me-not and lesser spearwort around the edges.
• Include at least one floating plant, such as water lily or frogbit, to provide shade and cover.
• Avoid introducing fish, which will eat tadpoles and newt larvae with enthusiasm.
• Never use slug pellets, weedkillers or fertiliser anywhere near the pond margins.

Barley straw, sold in small bundles, can help suppress algae without harming wildlife. A pond that turns green in its first spring is simply finding its feet, so be patient. Within a season or two, the plants and microscopic life will settle into a healthy equilibrium.

Planting for Shelter and Spawning

Native plants are the backbone of a productive pond. Frogs lay their spawn in clumps among submerged vegetation, while newts wrap their eggs individually in the leaves of water plants, folding them over for protection. Broad-leaved oxygenators such as water starwort are perfect for this. Around the edges, dense clumps of rushes, sedges and marsh plants give amphibians somewhere to lurk during the day.

Leave a wild, unkempt margin on at least one side of the pond. Long grass, log piles and a few stones at the water's edge create the damp, cool conditions that frogs and newts need to breathe and hunt. A tidy, closely mown edge might look neat, but it offers precious little cover. If you can, allow a patch of nettles or brambles nearby too, as these support the insects that amphibians feed on.

Hiding Places and Overwintering Sites

Amphibians do not spend all their time in water. Outside the breeding season, they range across the garden, so think of the pond as the heart of a wider habitat. Provide plenty of damp refuges close by:

• A log pile or stack of stones in shade, kept slightly damp.
• Leaf litter left undisturbed beneath hedges and shrubs.
• A rockery with gaps and crevices for toads to shelter in.
• An old flowerpot saucer or two sunk into the soil as mini-hides.
• Compost heaps, which frogs adore for their warmth and moisture.

In winter, frogs and newts often bury themselves in mud or leaf mould rather than staying in the pond. Resist the urge to tidy everything away in autumn. Those scruffy corners are essential habitat, and disturbing them can do real harm.

Pond Care Through the Seasons

Once established, a wildlife pond needs remarkably little intervention. In spring, watch for spawn and tadpoles, and avoid netting out leaves while they are developing. Through summer, top up water levels with rainwater during dry spells, and remove excess blanketweed by hand rather than treating it chemically. A few bundles of barley straw can help keep things in check.

Come autumn, leave fallen leaves around the margins where they fall, though you may want to skim a few from the surface before they sink and rot. In winter, do not break the ice by smashing it, as the shockwaves can harm overwintering creatures. Instead, float a ball or a pan of hot water on the surface to melt a breathing hole gently. Above all, be patient. A new pond often takes a full year before amphibians find it, but once they do, they tend to return season after season, bringing a chorus of croaks and a flicker of newt tails to your patch of Britain.