Irrigation
The green wall must always be maintained in a moisturized condition. This is rather a complex operation after all. The supply of water and how it is supplied is vital to determine how economical the process is. The planting media which is the mixture of soil and soilless material used on the green wall planting system will dry out sooner than the natural soil on the ground. Hence, constant care is required to prevent the media from drying out easily [17].