The natural garden is fashionable and destabilizes the powerful system of “flowering”, growing flowers. It operates an increasing seduction in town, where it symbolizes common nature and develops the ideas and the values of urban ecology and sustainable development. Today, the natural garden has become more radical in the hybridization between fallow land and garden, a new topic which values the confused aesthetics of the waste ground and crystallizes all the ambiguities of the relation with nature : welcoming natural mechanisms and at the same time controlling them. Conducted on a small Parisian fallow land, in a district particularly dense and subjected to strong political stakes, a research revealed the paradoxes of a new model of urban nature, from the waste ground to the “landscaped” fallow land, a curiously socialized “wilderness”.