PROBLEM TO BE SOLVED: To solve a problem that the greening of a ground can largely be advanced, when there is a means by which a small vacant lot, the rooftop of a building, a part of a pavement or the like can easily be greened. SOLUTION: A container for greening units can be degraded in soil, is light and inexpensive, and can easily be moved. The growth of plants in the greening units are performed by mixing fertilizers with culture soil to be charged in the container, transplanting the plants and culturing the plants with outdoor works. Air ventilation and drainage are noted as conditions for growing the plants. Thereby, the rationalization of the greening is promoted. The ground is not always necessary as a land for the greening, and even an area such as the rooftop of a concrete, asphalt building is sufficient.
