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.

Leaving a few deliberately untidy corners does more good than a uniformly neat border. A patch of long grass, a stack of logs left to slowly rot down, and leaf litter left in place over winter all provide shelter for insects, amphibians and small mammals that a fully cleared garden simply cannot offer.

Native hedging is a strong starting point. Hawthorn and holly, for example, provide dense shelter and nesting sites through spring and summer, then carry berries into autumn and winter when other food is scarce. Nectar-rich perennials planted alongside give pollinators a working food source through the growing season rather than a single short burst.

Bees and other pollinating insects rely on gardens for a large share of their food, especially in built-up areas where wildflower meadows are scarce. A garden that offers flowers from early spring right through to autumn does far more for pollinators than one with a single showy burst of colour in June.

Building a planting scheme with pond wildlife equipment in mind alongside the usual food and shelter provisions rounds out the picture. A well-stocked feeding station, including a reliable source of bumblebee food, complements planting choices particularly well during gaps in flowering.

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.