The Open Green project blends organic and technological matter into one and the same nature. Through analogue and digital means we do long term observations on the growth, blossoming and decay of plants and insects submitted to natural elements such as wind, sun, rain and pollution in an urban context.We monitor and extract data from natural processes both on a micro garden level as on a macro city level and make the data available online. We research the connections between people, technology and the possibilities of rooftop gardens.