Creating a Pond for Frogs and Newts

Why a Wildlife Pond Matters

Few things bring a garden to life like a small pond. Frogs, toads and newts have struggled as their natural breeding sites have vanished, so a well-designed garden pond is now one of the most valuable habitats you can offer. It does not need to be large. A modest pool of two or three square metres, with gentle slopes and plenty of native plants, can support common frogs, smooth newts and palmate newts — and if you are very lucky, great crested newts. Unlike a fish pond, a wildlife pond is left to find its own balance. No fish means tadpoles and newt larvae have a chance, and the shallow edges become a vital drinking and bathing spot for birds.

Choosing the Spot and Getting the Shape Right

Position matters more than size. Amphibians prefer a spot that is part sun and part shade, ideally with some dappled light for at least half the day. Full sun encourages algae, while deep shade slows plant growth. Avoid placing a pond directly under trees, where fallen leaves will overwhelm the water, and steer clear of spots that receive runoff from patios, drives or treated lawns. A little shelter from prevailing winds helps, but leave one side open so dragonflies and other insects can find the water easily.

Even a pond of 1.5 metres by 1 metre is worthwhile, though a larger surface area — say 2 metres by 3 metres — is more resilient. The shape should be irregular, with at least one gently sloping side. This is not just for looks. Frogs, newts and hedgehogs need a safe route in and out, and birds need shallow water to drink without falling in.

Digging In: Depths, Shelves and Sloped Edges

Start by marking out a curving outline, then dig in layers. Aim for a range of depths rather than a single deep hole.

• A shallow beach at one end, just 5–10cm deep, where birds can bathe and amphibians can enter.
• A marginal shelf around 20–30cm deep for plants such as marsh marigold and water forget-me-not.
• A central area of 60–80cm, deep enough to stay unfrozen at the bottom in a hard winter.

Line the hole with soft sand or old carpet, then add a butyl or EPDM liner. Fold the liner carefully into the shelves and slope, and leave an overhang around the edge to tuck under turf or stones. Fill with rainwater from a butt if you can; tap water contains chlorine and chloramine, which can slow down the natural colonisation of wildlife. If you must use tap water, let it stand for a few days before adding plants, and expect the pond to take a little longer to settle.

Planting for Frogs and Newts

Native plants are the backbone of a good wildlife pond. They provide cover, egg-laying sites and oxygen, and they help keep the water clear. Newts lay their eggs by folding leaves around them, so submerged foliage is essential. Frogs prefer shallow water with dense stems for spawn.

• Marginal plants: marsh marigold, water forget-me-not, brooklime, water mint and lesser spearwort.
• Oxygenators: hornwort and water starwort, which float freely and shelter tiny creatures.
• Submerged plants: curled pondweed, a native favourite for newt eggs.
• Floating plants: native frogbit, but keep it in check so it does not cover the surface.

Plant in aquatic baskets filled with loam-based compost, topped with gravel to stop soil clouding the water. Avoid invasive non-natives such as floating pennywort, water fern and parrot’s feather. Around the pond, leave a patch of long grass, a log pile and some leaf litter. These damp refuges are where amphibians spend much of their time when they are not breeding.

No Fish, Please: Keeping the Balance

It is tempting to add goldfish, but fish eat frogspawn, tadpoles and newt larvae. They also stir up sediment and eat the small invertebrates that make a pond tick. A wildlife pond should be fish-free. Ducks can cause similar problems by fouling the water and eating tadpoles, so discourage them if you can.

Green water and blanketweed are common in new ponds. Do not panic. Once plants establish and shade increases, the water usually clears. Remove excess blanketweed in spring with a stick, leaving it on the side for a day so any creatures can crawl back. Avoid chemical treatments, which harm amphibians and the insects they feed on. If algae persist, check that plants are growing well and that the pond is not receiving fertiliser runoff.

Year-Round Care and a Warm Welcome for Birds

Spring is the busiest time. Watch for frogspawn in the shallows and newt eggs among submerged leaves. Keep the surrounding grass a little longer and avoid tidying every corner. In summer, top up the pond with rainwater during dry spells, but do not worry if the level drops slightly. Autumn brings fallen leaves; net or skim them from the surface before they sink, but leave the pond itself alone. Never empty a wildlife pond in autumn, as amphibians and insects are preparing to overwinter.

In winter, a pond can freeze. Do not smash the ice with a hammer, as the shock waves can harm wildlife. Instead, place a warm pan of water on the surface to melt a hole, or float a small ball to keep a gap open. Birds will visit all year for drinking and bathing, especially if you keep one shallow, sloping edge free of plants and add a flat stone or log ramp. Be patient, keep the pond fish-free and chemical-free, and within a season or two you will have frogs, newts and a garden that feels truly alive.