A container for seedlings to be grown by the air root pruning method is moulded as a flat plastic blank with walls hinged for folding and base hinged to one of the walls permitting the container to be erected by engaging the walls and the base and attaching one wall to another. The erected containers stand in a tray like carrier and are connected together by a tie which overlies the containers. A handle extends through the tie to engage the carrier allowing a group of containers to be handled.
