Hedgehogs are one of the most recognisable mammals to visit British gardens after dark, often covering a surprising distance, sometimes a mile or more, over a single night as they forage. A garden that offers a route in, something to eat and somewhere quiet to rest is far more likely to see repeat visits than one that is sealed off and tidied within an inch of its life.

Different nematode species target different problems. Some are used against slugs, others against vine weevil grubs feeding on plant roots in containers and borders, and others against chafer grubs or leatherjackets damaging lawns. Because they are pest-specific, the right choice depends on identifying which pest is actually causing the damage.

Garden birds face different pressures depending on the time of year, slug nematodes and supplementary feeding is most valuable during two periods in particular: the late winter to early spring hungry gap, when natural food is scarce, and the breeding season, when adults are feeding hungry chicks.

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.

Hedgehogs typically hibernate through the coldest months, often in piles of leaves, log stacks, or purpose-built shelters tucked into a quiet corner. Anything resembling a bonfire pile should always be checked carefully before lighting, since it can look like an ideal hibernation spot to a hedgehog settling in for winter.

Timing across the season is worth planning for deliberately, since gaps in flowering leave pollinators with nothing to forage on for weeks at a stretch. Leaving seed heads standing rather than cutting borders back in autumn also gives finches and other seed-eating birds a natural food source right through the colder months.