A stackable water storage module (100) comprising a base portion (102) and a lid portion (104), wherein the base portion (102) is adapted to receive a lid portion (104), the base portion (102) has a base reservoir (106) for receiving water and a base reservoir overflow (110) adapted for water to overflow from the base reservoir (106) to a lid reservoir (116), the lid portion (104) is adapted to receive a base portion (102), the lid portion (104) has a lid reservoir (116) for receiving water and a lid reservoir overflow (124) adapted for water to overflow from the lid reservoir (116) to a base reservoir (106), and the lid portion (104) is adapted to receive a planter (118) in fluid communication with the lid reservoir (116).
