The cultivation tower comprises an alternating piling of two types of modules in the form of containers (1) and pots (6) acting as means to maintain a distance between the containers. The outer space between the modules is filled with soil. The containers are provided with a filtering and capillary bottom in the form of a sheet (4) supplied by the lower pot and capillary wicks (5, 7), some of which (7) being retractable. Said tower is comprised of elements which are easy to manufacture and allows a less frequent watering.