Yes, it is possible to move urban planter boxes once they are full of soil and plants, but it requires careful planning and the right techniques to avoid injury and damage. The primary challenge is the immense weight; wet soil and mature plants can make even a modestly sized planter extremely heavy.
Before attempting to move a planter, assess its size, weight, and your path. Clear the route of obstacles. For smaller, manageable boxes, you can lift them carefully with a partner, bending at the knees to protect your back. For larger planters, never try to lift them alone. Instead, use mechanical aids. A sturdy plant dolly or hand truck is the most effective tool. Gently tilt the planter, slide the dolly underneath, and secure it with straps. For slightly lighter boxes, sliding them on a furniture slider or a piece of thick cardboard can work on smooth surfaces.
Consider partially reducing the load. Temporarily removing some topsoil or carefully taking out a few plants can significantly decrease the weight. Water the plants a day or two before moving, as dry soil is lighter than saturated mud. When moving, protect your plants by bracing stems and branches with soft ties to prevent breakage. Move slowly and steadily, checking the planter's stability frequently.
Ultimately, while moving a full planter is feasible, planning for mobility from the start is wise. Choose planters with built-in wheels or place them on wheeled platforms from the beginning. This foresight allows you to easily rearrange your urban garden for sunlight, aesthetics, or space needs with minimal effort.