Agriculture is a system, transforming itself since thousands of years and according to society. Urban farming has the demand to complement common agriculture. Light exposure, soil quality and traffic emissions are problems for urban farming. If we want to grow food in cities we can't build ordinary skyscrapers like we use to build for office use.<br />If we want to establish horticulture in an urban context, we have to consider hidden potentials. Communities and social solidarity can be encouraged. Urban wastelands have a great potential for interventions.<br />It is important to consider these issues and develop new strategies.<br />This scheme has the ambition to develop its own aesthetics without any "fashionable" demand. It is a link between small initiatives and large scale visions of vertical farming. Therefore area-based common agriculture has to be transformed to vertical by considering greenhouse principles and the impact of urban soil contamination. Beside developing technology and serving fresh vegetables, the design broaches the issue of land consumption caused by traffic, using existing infrastructure and revitalizing urban wastelands.<br />My ambition is to create architecture which will deal with the local urban situation and the requirements of growing plants. Focusing the process from breeding to harvesting, the building has to act like a machine. It is desirable to provide an efficient and flexible growing system and to adapt existing hydroponic technologies for soilless growing.<br />