I let the grass grow long then give it a high cut round about now. The garden is in some respects a wilder version of the typical English garden i.e. grass down the middle and herbaceous borders each side but I wouldn't call it a "lawn" as such. By this point in the year the surrounding trees are in full leaf and the effect is reminiscent of a woodland ride.

 NB I notice that the conservation charity Plantlife has a campaign called "No mow May" - my sentiments exactly.