No Mow May: don't cut the grass — Plantlife turns lawn laziness into bee food

Britain had lost nearly 7.5 million acres of flower-rich meadows and pastures since the 1930s, cutting the early-spring food that bees and butterflies need. Plantlife, a wild-plant conservation charity, wanted a behaviour change people could make on their own doorstep without any new product or infrastructure.

Make 'don't mow in May' a national month: let daisies, clover and dandelions feed hungry spring pollinators, then count every flower as citizen science.

From 2019 Plantlife asked gardeners to park the lawnmower for May and pledge online, then to take part in 'Every Flower Counts', a citizen-science survey in the last week of the month that records what actually blooms in wilder lawns. Councils were invited to sign up too, and when Appleton, Wisconsin adopted the idea in 2020 it waived the city's lawn-height fines for the month.

Participation more than trebled between 2019 and 2023, and in 2021 UK participants recorded more than 250 plant species, including rarities such as adder's-tongue fern and snake's-head fritillary. By May 2022 the movement had spread to more than 30 US cities, mostly in the Midwest, where Appleton alone registered close to 500 participating households and an initial city study reported fivefold higher bee abundance on unmowed lawns.

No Mow May began in 2019 as a campaign by Plantlife, the UK charity for wild plants, built on one counterintuitive instruction: stop mowing your lawn for May. The point was not tidiness but food — in spring, pollinators emerge from hibernation just as forage is scarcest, and dandelions, daisies, clover and buttercups growing in lawns become an early nectar supply.

The campaign added a citizen-science layer: in the last week of May, participants count the flowers in their uncut lawns through 'Every Flower Counts', producing data on what grows in British gardens. Britain has lost nearly 7.5 million acres of flower-rich meadows and pasture since the 1930s, so the charity framed each small patch as a mini-meadow; by 2021 participants were reporting more than 250 plant species, including rare ones such as adder's-tongue fern and snake's-head fritillary.

The idea travelled far beyond Britain. Appleton, Wisconsin became an early US adopter, waiving its eight-inch lawn-height rule for the month, and by May 2022 NPR reported the practice in more than 30 US cities, mostly in the Midwest, with hundreds of households in Appleton alone. Local researchers there measured five times more bees on unmowed lawns than on regularly cut parkland, giving the 'lazy' month a measurable conservation result.

It converted inaction into an act of conservation: not mowing is easier than any eco-shopping list, so participation had a low bar.

The shared month created a social wave — neighbours' unmown lawns signalled belonging rather than neglect.

Every Flower Counts gave the gesture scientific meaning: each garden became a data point for wildflower and pollinator evidence.

Cities could adopt it as a policy with one simple waiver, which is how one UK charity's idea reached US municipal codes.

The most portable call to action is an omission: asking people to do nothing this month — with a pledge and a survey — turned private lawns into public, measurable habitat.

No Mow May became an annual fixture rather than a one-off stunt: Plantlife kept expanding it into a year-round 'No Mow Movement', with councils committing to let public verges and green spaces grow. In the US the practice continued spreading through the Midwest, with cities waiving lawn-height citations for May each year, and follow-up studies in Appleton tracked bee and flower diversity on participating properties. By 2023 Discover Wildlife reported the trend toward wilder lawns was still growing 'from the grassroots up'.