This research investigates how a communication system could support urban gardeners intheir activities. By looking at agriculture not as a mere activity for food production but as arich social practice, this research addresses gardeners dual need of acquiring knowledge and develop social relationship.Findings from an ethnographic research of two local agriculture communities are described.Participatory design has been used to identify design opportunities and co-create conceptideas. Prototypes have been used to evaluate key aspects and refine the final concept. Byinviting intended users to take an active role during the entire design process, the result of this research is grounded not only in the theory but also on people's aspirations and realexperience.