The short answer is: not usually, and not safely, once the planter is filled with soil, plants, and water. A large urban planter box can look movable, but wet soil is extremely heavy. Even a planter that seems empty may contain drainage layers, roots, or compacted soil. Two people can easily lift a large planter only if it is genuinely lightweight, empty, well-balanced, has strong handles, and is small enough for a two-person lift. Otherwise, two people should not attempt to lift it by hand.
Weight is the key issue. Soil can weigh roughly 75–100 lb per cubic foot when wet, depending on type and compaction. A planter holding several cubic feet of soil can therefore weigh hundreds of pounds before plants and the container itself are added. Materials matter too: resin and fiberglass are lighter, while concrete, metal, and thick wood can be very heavy. Size, center of gravity, drainage, and access to the site also affect whether a lift is realistic.
For safety, empty the planter first if possible, remove plants and soil, and move the container in sections. Use a heavy-duty dolly, furniture straps, or casters designed for the load. If the planter is fixed, oversized, or already planted, hire professional movers or landscapers. Test the load by tilting slightly, not by lifting. Keep the lift close to the body, avoid stairs, and use enough people for the weight. In most urban settings, two people cannot easily lift a large filled planter box, and trying to do so can cause injury or damage.