For decades, the perfect lawn was seen as short, tidy and weed-free. But a growing movement is encouraging people to rethink that patch of grass outside their homes, schools and workplaces. No Mow May, launched by Plantlife in 2018, asks people to pause mowing during May and allow lawns to grow naturally for the benefit of wildlife.
The idea is beautifully simple: many lawns already contain layers of dormant wildflower seeds and native plants just waiting to emerge, but frequent mowing prevents them from flowering. By letting grass grow for just a few weeks, gardens can suddenly become buzzing micro-habitats filled with colour and life.
The movement comes at an important time. Britain has lost an estimated 97% of its flower-rich meadows since the 1930s owing to intensive agriculture and development. This decline has dramatically reduced food sources for pollinators and other insects. Studies show that lawns cut less often can produce significantly more nectar and support a greater diversity of insects and wildflowers. Even a small unmown patch can help reconnect fragmented habitats across urban areas.
What appears in a “wild” lawn can vary hugely, but many gardens naturally produce daisies, dandelions, white clover, buttercups, selfheal, speedwell, bird’s-foot trefoil and yarrow. While often dismissed as weeds, these plants are incredibly valuable. Dandelions provide one of the earliest food sources for bees emerging from winter, while clover is rich in nectar for bumblebees and butterflies.
And where flowers appear, wildlife follows. Longer grass provides shelter for beetles, caterpillars, spiders and grasshoppers, while bees, hoverflies and butterflies arrive to feed on nectar and pollen. Birds such as robins and sparrows may then forage for insects among the grass. A lawn left untouched for a month can become a tiny but thriving ecosystem, humming quietly beneath our feet – a miniature meadow hidden in suburbia.
Importantly, No Mow May does not need to end in June. Many people are now adopting “Slow Mow Summer” approaches by reducing mowing frequency throughout the season. One of the best ways to continue is through mixed mowing: keeping pathways and seating areas neat while leaving borders or selected patches longer and flowering. Cutting every few weeks instead of every weekend can make a huge difference to biodiversity while still keeping spaces usable and cared for.
Sometimes environmental action looks dramatic. Sometimes it looks like putting the mower away for a while and watching nature do its own thing.