A green roof planter module includes a planter including a bottom wall, a plurality of sidewalls each including an upper portion and a lower portion, wherein the bottom wall and the plurality of sidewalls cooperate with one another to form an interior space, and a biodegradable collar member extending upwardly from at least a select one of the biodegradable sidewalls, wherein at least a portion of the collar member is in-molded within the upper portion of at least one of the sidewalls, and wherein the collar member is adapted to retain a plant matter that extends above the plurality of sidewalls.
