Abstract: A device for growing plants at an abnormal growth rate in a container (9), which has entirely or partially perforated walls and an aperture in the growing direction of the plant, has the shape of a pouch with at least one stiffening strap (10). The container (9) is surrounded by a guide member (1) having a guide frame (2) adapted to the curve of the stiffening strap (10) adjusted therein and having at the upper end an annular lip (3) in the aperture of which said container (9) is fitted. In the aperture of the annular lip (3) can be inserted a clamping ring (13) by which the upper edge of the container (9) is clamped between said ring and the inner wall of the annular lip (3).