This paper deals with the issue of biodiversity in urban areas as it is perceived and communicated by professionals in park administrations and in nature conservation in Sweden. The background is the Convention on Biodiversity (CBD) which states that biodiversity must be promoted and sustainably used. Biodiversity in urban areas in Swedish cities is rather high, for example where there are old trees. Disseminating knowledge about promoting biodiversity in urban areas and using it in park management organizations is a matter of communication. There is a lack of knowledge on how the CBD is implemented in urban context and it has not been covered from a communicational point of view. Based on theories on Learning Organizations and Social Psychology, the paper will discuss the communication aspect in contemporary park- and nature discourse in Sweden. How do professionals communicate on the topic of biodiversity in urban green areas? A method of a dialogue seminar was used for investigating contemporary discourse. The communication aspect is studied at a face to face level when professionals exchange knowledge and attitudes. Contradicting goals for managing urban green areas with a focus on biodiversity are discussed. Professionals with different backgrounds, working with different target pictures discuss park management and nature conservation ideas related to the goals of the CBD, implemented in urban green areas. Different professionals used different concepts but the participants were surprisingly close and used to understand each others vocabularies. There were similarities in their overall objectives for urban park management. This changed when the questions zoomed in on real examples. Another outcome was that the participants claimed they got more conscious of their own and the others’ roles and attitudes towards biodiversity and related issues as the discussions reached a meta level. Although biodiversity is on the agenda at many park departments, still there is a trust in traditions and “old” goals for park management, such as keeping the park tidy and free from weeds and dead wood. At the same time as plans and policies “talk” nicely about achieving large national and international goals, like the CBD, workers involved in the practical maintenance are not involved in the plans and parks are still maintained traditionally.