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Environment, VPD & Climate Control

How to Cool a Grow Tent During Australian Summer
Australian summer is the hardest time of year to run an indoor hydroponic setup. Ambient temperatures across Melbourne, Sydney, Adelaide, and Perth regularly push into the mid to high thirties, and inside a grow tent running lights and fans that ambient heat compounds quickly. High canopy temperatures slow growth, reduce yield, increase pest pressure, and in severe cases cause plant stress that takes weeks to recover from. Managing heat during Australian summer is not optional for growers who want consistent results through the warmer months. This guide covers the most... Read more...
VPD in Australian Grow Rooms: The Complete Guide for Indoor Hydroponic Growers
VPD is one of the most important environmental metrics in modern indoor growing. Most growers have heard of it. Far fewer actually understand what it measures, why it matters more than relative humidity alone, and how to use it to improve plant performance. This guide covers what VPD is, the target ranges for each growth stage, and how Australian growers can dial it in across the different seasons and climate zones we actually deal with. What VPD Actually Measures VPD stands for Vapour Pressure Deficit. It measures the difference between... Read more...
Why Your Hydroponic Nutrients Stop Working at Night: Leaf Temperature, Humidity & Transpiration Explained
Many indoor growers spend hours dialling in their nutrient schedules, EC levels, and feeding charts, while completely overlooking one of the most important drivers of plant performance: what happens in the grow room after lights off.In hydroponic systems, plant performance does not stop when the lights turn off. In fact, some of the most damaging environmental problems occur during the dark cycle, particularly in sealed tents, LED grow rooms, and poorly ventilated indoor environments.Night-time humidity spikes, falling leaf temperatures, condensation, and unstable VPD can all reduce nutrient uptake efficiency, increase... Read more...
Relative Humidity vs VPD: Why Dialling In Your Grow Room Environment Changes Everything
Most growers track relative humidity, but VPD is the metric that actually drives transpiration, nutrient uptake, and yield. Learn how to dial in your grow room environment for maximum performance. Read more...