A modular plant container system is disclosed for displaying and providing life support and mechanical support for live, synthetic, and rootless plants. The system includes a primary container, a subcontainer intended to contain life supporting elements such as nutrients, soil, and moisture, and a removable structure that engages with the primary container and the subcontainer to support the trunks of rootless plants such as live Christmas trees or top heavy synthetic plants. Said removable structure is configured to support a wide variety of trunk sizes be easily installed or removed from said primary container.
