Tree art is putting down roots Tree art is putting down roots Arboreal art is having a moment. We explore how artists are installing trees in public spaces as odes to social change. Branching out of barking fad? Klaus Littmann, Arena for a Tree, 2021. Photography: Gerhard Maurer It may sound far fetched, but we have it under good authority that art is starting to grow on trees. They line our parks, maintain our industries and sustain our existence. And trees’ role in public installation art is far from revolutionary. One need only bark back to the artist and environmental activist Joseph Beuys’