Yes. Wheelchair-accessible urban planter boxes exist, although they are less common as off-the-shelf products than standard planters. They are offered by accessible-garden suppliers, custom fabricators, and landscape architects, and many public-realm projects use custom designs rather than a single catalog model.
A wheelchair-accessible planter is not just a raised box. Key features include a rim height around 24–30 inches (60–76 cm) above the ground, knee and toe clearance underneath, a maximum reach depth of about 20–24 inches, and a firm, level route at least 36 inches wide with turning space nearby. The planter should also provide clear floor space for a forward or side approach and avoid forcing users to twist or lean over sharp edges.
Common designs include table-style planters with open undersides, linear beds with recessed bases, tiered planters that place some soil at seated height, and modular units with accessible irrigation controls. Good designs consider drainage, soil weight, edge protection, thermal comfort in sun or cold, and maintenance access. Faucets, hose connections, and tool storage should be within reach ranges, and paths should stay stable and free of lips or loose gravel.
So the answer is yes—but the best results usually come from specifying accessibility as a performance requirement rather than buying a generic raised bed. Check dimensions against local accessibility standards, test reach and clearance with real users, and choose durable, non-reflective, non-toxic materials suitable for an urban public space.