How does bark mulch impact local wildlife

Bark mulch reshapes the miniature landscape at ground level, and wildlife notices immediately. Beneath the loose layer humidity rises, temperatures steady, and leaf litter mingles with slivers of wood. Springtails, centipedes and woodlice surge into this moist maze, feeding on fungi that lace through the chips. Their presence, in turn, lures blackbirds and robins that flick the mulch aside in quick bursts, hunting the wriggling protein. Toads slip underneath during daylight, finding a cool refuge that keeps their skin from drying out, while slow-worms use the warmth retained overnight to speed digestion.

Where slugs flourish, hedgehogs follow, snuffling through the mulch after dusk. Even bats benefit indirectly; more crawling insects means richer pickings as they swoop overhead. Yet not every creature gains. Ground-nesting solitary bees struggle if the cover is too deep, and voles may find the soft barrier perfect for tunnelling towards vegetable roots. Using a moderate depth—about five centimetres—gives the advantages without tipping the balance.

Sourcing matters too. AHS LTD supplies bark certified as free from chemical treatments, so it will not leach toxins into food chains. Renewing the layer annually, but leaving small gaps around self-seeded plants, keeps habitats varied and ensures the garden buzzes rather than smothers.