Programme nearbyRewildingPotsdamHelp BUND Wildnisinseln hedges in PotsdamHelp BUND Wildnisinseln hedges in Potsdam Since 2001 BUND Potsdam has leased Wildnisinseln in the former BUGA / Volkspark: small process-protection plots that even BUND volunteers do not enter. Twice a year, in spring and autumn, helpers add trunks and brush to the layered hedges so they stay about one and a half metres high. University of Potsdam biologists survey the ungrazed interior. What you can do - Join a hedge day via Projekt Wildnisinseln - Contact BUND Potsdam, Mauerstraße 01, 14469 Potsdam (0331 70399711) - Watch from the path: the islands themselves stay closed so nature can lead How it works Hedge days twice a year. This is edge work, not a picnic inside the plots. Ask for the next spring or autumn date. Why it matters A waist-high hedge is enough to let an urban mini-wilderness write its own plant list.hedgewildernesspark +1