Gardeners are joining a movement to let their lawns grow in May, a poll has found, as an annual campaign to boost nature in gardens kicks off. The “No Mow May” campaign, led by wildlife charity Plantlife, urges people to leave their mowers in the shed for May to allow grasses and wildflowers to flourish. Wilder lawns in the warmer months can help to support bees, pollinators, butterflies, small mammals and other wildife. Plantlife said the movement is growing, with an analysis of participants who signed up for last year’s campaign, showing that a third (32%) were first timers. The survey of 2,001 adults, carried out by Opinion Matters in March, found that two-thirds (66%) believe their garden can make a real difference for nature. The research also suggests letting lawns grow can be a social choice, with six in ten people between the ages of 25 to 34 saying they would be more likely to join the movement if their neighbours do.…