The present invention relates to a container (2) for propagating growth of seedlings, having a main body (3) comprising a base (4), a central wall (6) extending vertically from the base (4). A first wall section (8) and a second wall section (10) are arranged to the main body (3). The first wall section (8) and the second wall section (10) are hingeably connected to the main body (3). The base, the central wall, the wall sections forms in the closed condition at least two cells (14, 14') being open at top (18). The base (4) comprises a supporting structure (24) at the lower part of the main body (3), wherein the main body (3) is provided with supporting means (28, 28') for holding an irrigation mat (30).The present invention also relates to a tray (40) designed for receive and carry one or more of said containers (2), a greenhouse (60) including the tray and one or more of the mentioned containers (2), and a method for propagating growth of seedlings.
