Helping Garden Wildlife Through Winter

Nematodes are microscopic roundworms that occur naturally in soil, and certain species have been developed for use against specific garden pests. Rather than acting as a broad chemical treatment, each nematode species is matched to a particular pest, seeking it out and interrupting its lifecycle with far less impact on the rest of the garden than a chemical spray.

Design details matter more than they might appear to. Good insect houses combine hollow stems, such as bamboo or reed, with drilled wood blocks offering a range of hole diameters, roughly 2 to 10mm, since different species use different sized cavities. Natural, untreated materials are preferable to anything varnished or chemically treated.

Winter is one of the harder seasons for garden wildlife. Natural food becomes scarce, cold weakens smaller animals quickly, and many species rely on undisturbed shelter to see them through to spring rather than active foraging.

A garden pond, even a small one, is one of the most valuable additions for wildlife. Frogs and newts use it to breed, dragonflies and damselflies lay eggs in it, and birds and hedgehogs will drink and bathe at the edges given the chance.

Fish are worth thinking through carefully. Ornamental fish will happily eat frogspawn and tadpoles, so a pond intended mainly for bee hotels amphibians is usually better left fish-free. Leaving some leaf litter to settle at the bottom over autumn also gives amphibians a place to shelter through the colder months.

Access is usually the first barrier. Solid fencing and walled boundaries cut a garden off from the wider network a hedgehog relies on. A gap roughly the size of a CD case cut at the base of a fence panel, sometimes called a hedgehog highway, lets them pass between neighbouring gardens without needing to cross open roads or driveways.