Body (1； 101； 201) for cultivation of a plant (2) comprising a growing medium, wherein the body (1； 101； 201) has a longitudinal axis (3) and an external surface (4). The external surface (4) is defined by an upper surface part (5), a lower surface part (6) opposite to the upper surface part (5), an outer surface part (7) and an inner surface part (8) opposite to the outer surface part (7). In a first transition zone (9), one longitudinal side of the inner surface part (8) is connected to one longitudinal side of the outer surface part (7) and, in a second transition zone (10), the other longitudinal side of the inner surface part (8) is connected to the other longitudinal side of the outer surface part (7). The body (1； 101； 201) is transformable from a first shape into a second shape, wherein, viewed in a plane transverse to the longitudinal axis (3), the outline of the second shape is determined by the outer surface part (7) and wherein, in the first shape, the body (1； 101； 201) is unfolded such that the inner surface part (8) is exposed to the surrounding (11) and wherein, in the second shape, the body (1； 101； 201) is folded up such that the inner surface part (8) is folded up onto itself.
