Goran was one of the participants from the recent workshop in Vienna. He sent me a link to this video documenting his community garden project in Croatia.
In his own words, according to the description on the YouTube video:
Published on Apr 22, 2013
Promotional video for grassroots urban gardening project in Croatian city of Varaždin. The project started 1st of May 2012. At the moment 100 gardeners take care of their 50 m2 gardens on area of about 1 hectare. The project was realized completely without money but with great enthusiasm of the citizens.
You can find more detailed description here:
http://sozialmarie.org/projects/Furban_community_garden_miracle_gardens.2603.html
You can also find their Croation language blog here.