Collection: Humidifiers & Dehumidifiers

Master your relative humidity (RH) with our high-performance collection of Humidifiers and Dehumidifiers. Maintaining precise moisture levels throughout every stage of plant development is critical for optimising Transpiration, maintaining target Vapour Pressure Deficit (VPD), and driving maximum nutrient transport from the roots to the canopy.

During early propagation and vegetative growth, young plants thrive in high-humidity environments (60% - 70% RH) to prevent moisture stress while root systems establish. Our high-output ultrasonic humidifiers generate a fine, cool mist that rapidly raises relative humidity without increasing ambient grow room temperatures or leaving water droplets on leaf foliage.

As plants transition into dense flowering and fruiting phases, transpiration increases significantly, driving up humidity and creating risks for fungal pathogens like bud rot (Botrytis) and powdery mildew. Our heavy-duty commercial dehumidifiers quickly extract excess ambient moisture, keeping air movement clean and dry. Equipped with built-in humidistats and continuous drain options, these units allow for seamless, automated moisture management in grow tents, greenhouses, and commercial cultivation facilities.

Key Benefits:

  • Optimised Vapour Pressure Deficit (VPD): Maintains ideal relative humidity levels for peak stomatal opening, transpiration, and nutrient uptake.

  • Effective Pathogen Defence: Rapidly removes excess moisture in flowering stages, protecting crops from Botrytis, powdery mildew, and dampening off.

  • Automated Humidity Control: Features units with integrated humidistats and auto-restart capabilities for continuous, worry-free operation.

  • Cool Ultrasonic Mist Generation: Humidifiers increase moisture without emitting heat, preserving target grow room temperatures.

  • Continuous Drainage Capability: Dehumidifiers feature dedicated hose outlets for direct connection to waste lines or water storage reservoirs.

Plan Your Grow With Confidence

Not sure how much you need? Use our free Garden Calculators to take the guesswork out of growing. From soil volumes to feed rates, our tools help you get it right first time — so nothing goes to waste and your plants get exactly what they need.