https://nomowmay.plantlife.org.uk/

An annual event run by the environmental charity Plantlife that encourages people across the UK – and beyond – to lock up their lawnmowers on 1st May.

Leaving your lawnmower in the shed and letting your lawn grow long, just for the month of May means smaller plants like clover, daisies, dandelions, selfheal and clover will get a chance to flower and give pollinating insects a head-start.

This is important as, since the 1930s, we have lost nearly 7.5 million acres of flower-rich meadows and pastures. Just 1% of our countryside now provides this floral feast for pollinators. With 15 million gardens in Britain, our lawns have the potential to become major sources of nectar.