Professional indoor cultivation of cannabis require lots of dedicated hardware, to allow your plants to enjoy the tropical climate even in the harshest of places. All of that have to be kept somewhere. By keeping the growing space limited it is easier to achieve the required temperature (26-28C or 75-85F) and humidity (60-80% in the veg period).
All these conditions are fulfilled by the dedicated growing tents, made explicitly to suit all your cannabis growing related needs. Ranging in size and quality, they could be used both for home scale hobby growing and professional, commercial plantations.
A special line of products exist for cloning, since these are best kept apart from the mature plants, due to different requirements. Great addition enhancing the whole process from seed to harvest is a dry tent, in which your mature cannabis plants turn to top quality marijuana.