The meetings are directed to sales specialists responsible for buying and selling plants, greenery constructors, landscape designers and civil servants in charge of green areas in cities and communes. Various seminars concerning roof gardens took place during the exhibition. Among the issues discussed were an adequate choice of plants, ground, and care instructions. There were also some solutions presented. The mayor of the Grodzisk Mazowiecki commune, Mr Grzegorz Benedyktyński was among the invited guests.