Grobrix is designed to work best indoors, and we encourage putting Grobrix only in an indoor setting.   Reason: (1) Singapore is warm and tends to get really hot on days. The plants are not designed to endure such heat by nature. Hence, growing outdoors might not be as optimal.   (2) The Grobrix Farm Wall must be fully sheltered from rain and strong wind, as mechanical timers and main powers must be protected from water.