This utility model relates to gardening in general and to modular systems for arranging plant compositions in particular. It can be used for growing plants, particularly flowers, berries, seedlings, decorative plants in greenhouses, indoors and outdoors. The technical result is to provide a plant composition by disposing in each external module (1) one internal module (2) selected from a plurality of different height internal modules for plants having different root systems with the upper edges of different height internal modules on the same level. The modular system for arranging plant compositions comprises external modules and internal modules for plants, each disposed in the corresponding external module. The external module may be provided of a shape, the cross-section of which is of any geometrical configuration, preferably the same for each external module. For example, it may be of square, rectangular, hexagon, round or irregular cross-section shape. The position of each internal module for plants is fixed in the corresponding external module by means of contact with the external module sidewall or bottom either directly or via intermediate elements. Each internal and/or external module is provided in the sidewalls and/or bottom with openings for water surplus drainage and soil aeration inside the internal module.
