Embodiments are described for a cardboard box assembly for use in a modular green roof system. The box includes a drainage board, filter and pre-vegetated growing media. A lid assembly is placed over the box during transport and storage. The box/lid assembly is designed to be stackable for easy transport on pallets for placement in an interlocking array on a roof or similar surface. The box is made of biodegradable cardboard allows for the eventual breakdown of the container portion of the assembly and the formation of an integrated green roof of interlocking plants after a period of time after installation. The filter fabric sock wrapping the box bottom, sides and fitted top provides the enclosure that will hold the pre-vegetated modular components together when the cardboard box eventually biodegrades.
