Letting grass grow long boosts butterfly numbers, UK study proves

Analysis of 60o gardens shows wilder lawns feed caterpillars and create breeding habitat

Good news for lazy gardeners: one labour-saving tweak could almost double the number of butterflies in your garden, according to a new scientific study - let the grass grow long.

In recent years nature lovers have been extolling the benefits of relaxed lawn maintenance with the growing popularity of the #NoMowMay campaign. Now an analysis of six years of butterfly sightings across 600 British gardens has provided the first scientific evidence that wilder lawns boost butterfly numbers.