Plants are in a constant state of acquiring and losing water, and grow room moisture levels directly affect this cycle. The environment is one of the biggest factors in deciding the success of your crop, having a massive impact on photosynthesis rates and nutrient uptake. We stock the equipment you need to maintain perfect moisture levels in your grow room and grow tent at all times - whether it's dehumidifiers, humidifiers, or the controllers to keep them running in the sweet spot. If you want to push things to the next level, then take a delve into vapour pressure deficit (VPD), a measurement that gives you a much clearer insight into plants' transpiration rates, allowing you to get conditions.