Growroom

A growroom (or grow room) is a room of any size where plants are grown under controlled conditions. The reasons for utilizing a growroom are countless. Some seek to avoid the criminal repercussions of growing illicit cultivars, while others simply have no alternative to indoor growing. Plants can be grown with the use of artificial light, sunlight, or a combination of the two. Due to the heat generated by high power lamps, grow rooms will often become excessively hot relative to the temperature range ideal for plant growth, often necessitating the use of a supplemental ventilation fan.

The plants in a growroom can be grown in soil, or without soil via means such as hydroponics, and aeroponics. Not only is growing in a soiless medium more cost effective, sometimes one also gets a much higher yield, as well as faster fruit maturation.

Soiless mixes usually carry 0% nutrients so the gardener can utilize the perfect combination of nutrients for the crop. Vermiculite, perlite, coconut husk and rockwool are the most often used components in soiless mixes for indoor cultivation.

The three most common varieties of artificial lighting for indoor growing are high-intensity discharge lamps (the most prevalent for this application being: sodium-vapor lamps for flowering and metal halide lamps for growing), compact fluorescent lamps, and traditional fluorescent lamps. Full spectrum indoor LED grow lights are becoming more common in grow rooms due to their low energy requirements and very low heat output.

Light is the essential "plant food"; everything else provided in cultivating a plant serves the purpose of helping it absorb and use the light. As the plant grows larger, it requires an increasing amount of light. There is no substitute for light: if the amount of light received by the plant is insufficient, the plant will stretch, and / or growth will slow to a halt.

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Wikipedia