The drip irrigation system means 100% control of the watering, avoids drying out the top plants and waters the lower ones. There is a water reservoir at the bottom of the pot. The built-in water reservoir means that the plants only need to be watered about every three weeks. If the water level goes over the edge of the water reservoir, the water is drained through a grate to the pipe that connects all the pots.

Any surplus water from one plant does not flow to other plants on the wall. This prevents the spread of any diseases and avoids over-watering. The irrigation method makes the system very reliable and ensures optimal growth conditions for the plants, no matter where in the green wall they are located.