Abstract: A container system for growing plants includes a container and a growing medium. The container comprises one or more flat but flexible wall panels (10, 10', 10", 62) and connectors (12, 12', 12", 24 and 25, 66) for joining adjacent wall panel edges to form a continuous container wall. The panels have openings (18, 90, 98) through which plants (40) can be grown. Openings not in use are closed by integral flaps (16, 63), which spring open or shut owing to the curvature of the panels and the flexibility of the panel walls, and snap shut into the openings. Long panel connectors include channels (20, 28) for receiving and engaging complementary panel edges, and stiffen the containers. Perforated irrigation tubes (44) may stand in the assembled containers and pass through apertured top caps (50); bottom caps (50, 70) provide drainage. The containers can be extended in size by connecting further wall panels, and some can be stacked.