Body for cultivation of a plant, comprising a growing medium. The body has a longitudinal axis and an external surface defined by: an upper surface part a lower surface part opposite to the upper surface part an outer surface part and an inner surface part opposite to the outer surface part. In a first transition zone, one longitudinal side of the inner surface part fades into one longitudinal side of the outer surface part and, in a second transition zone, the other longitudinal side of the inner surface part fades into the other longitudinal side of the outer surface part. The body is transformable from a first shape into a second shape. Viewed in a plane transverse to the longitudinal axis, the outline of the second shape is determined by the outer surface part. In the first shape, the body is unfolded such that the inner surface part is exposed to the surrounding. In the second shape, the body is folded up such that the inner surface part is folded up onto itself.
