Planting boxes can be bolted together to create mini gardens and farms, with this simple construction system devised by Danish architects Sine Lindholm and Mads-Ulrik Husum.

It's a modular building kit that can be assembled in endless different configurations to make a unique 3-d space.

The system consists of just six parts, which include a standard-sized planting box, shelves and fixings.

Learn more about this modular urban garden here.