Yes. Modular urban planter boxes are widely available, and many are specifically designed to connect. Most systems use interlocking clips, slide-in connectors, bolts, or stackable frames, so you can join two or more boxes into a long row, an L-shape, a grid, or a vertical green wall. This makes them useful for balconies, rooftops, patios, community gardens, and small courtyards where space is tight and layouts may change.
When choosing connectable planter boxes, check the connector style first. Clip-together plastic modules are lightweight and affordable, while powder-coated metal or timber systems feel more architectural and can handle larger plants. Look for matching drainage trays, removable liners, and optional wheels if you need to move the setup. For rooftops and windy sites, choose heavier modules or add ballast and wind protection. If you want low-maintenance planting, consider self-watering modules or a simple drip-irrigation kit that can serve several connected boxes.
You can also mix sizes: low modules for herbs and flowers, deeper boxes for small shrubs or vegetables, and narrow connectors for tight edges. Before buying, measure the final footprint, confirm that the connectors are included, and check whether the system can be expanded later. With the right modular system, you can start small and reconfigure the planter layout as your garden grows.