In 2017 Porto/Post/Doc presented a Focus dedicated to the work of Peter Mettler. The following year the festival screened Becoming Animal and since then the director has not made any more films, dedicating himself to the practices of expanded cinema, mixed media and photography. This is when he resurfaces with the monumental While the Green Grass Grows, based on a filmed diary that the director has been composing for almost a decade (and which corresponds to the first two volumes, of a total of seven, of what will be a film of more than 12 hours). An essayistic and intimate object that reinvents itself at every moment, changing tone, theme and approach like a free and loose conversation. An unclassifiable film by a filmmaker with no brakes.

While the Green Grass Grows premiered at the Visions du Réel festival, where it won the Grand Prize in the International Competition.