The system is based on the principles of hydroponics, that is the plants are rooted in a porous material soaked in fertilizer instead of soil. A vertical garden can be of any size or form. Provided that there’s sufficient artificial light, it can be placed even in a room without any natural source of light, e.g. in a garage or an underground station.The plant wall can be a solitary standing object or a partition. However, it can also be mounted on the wall without causing damage. Beyond the aesthetic value, its physiological effects are beneficial: it cleans the air and depending on the size, it creates ideal humidity levels, climatizing the room. The structure itself is a 10 mm-thick humidity-proof plastic panel fitted on a stainless metal frame, which is covered in a special, rot-free, absorbent synthetic felt in layers. This felt serves as pockets for planting. The entire width of the structure is no more than 4 cm, its weigh is about 20 kg/sqm. The supporting frame includes a water-tank and an automatized drip irrigation system developed by hydraulic engineers. Watering takes just a couple of minutes a day and, thanks to the modern pump, it functions noiselessly. Lighting depends on where the green wall is erected. Mostly it requires powerful metal-halid reflectors or LEDs specially designed for plants, which are long-lived and energy-saving.