Abstract: A Mini Chamber is of the type constituted by a plastic container with a top closure lid, inside which a reticulated mesh basket is housed, extended in a horizontal plane, on which the seeds are arranged, which is removably mounted on an intermediate height above the volume of water contained in the bottom of said container. The novelty lies the plastic container is a cylindrical body of vertical axis and circumferential section, with an open top base on which a dome shaped top closure lid is placed. The invention considers the plastic container may be slightly conical, tapering towards its lower base. Preferably, both the top closure lid and the container itself are made of a transparent plastic material such as polycarbonate or polypropylene.