Growing Cannabis

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Get ahead of changes in regulation. Learn how commercial dehumidification can yield pesticide-free cannabis through controlled growing. Eliminate cannabis mold, track growing temperatures and CO2 to produce more, higher quality plants.

humidity condensing on a leaf

Water Vapor in Grow Rooms: Moisture, and How to Measure It – Part I: Relative Humidity

Plants require specific humidity levels to thrive during every stage of growth. In this guide, we define relative humidity, explain why temperature impacts moisture levels, and outline the optimal percentages for your grow room. Learn how monitoring this vital metric can help you avoid plant stress, prevent powdery mildew, and maximize your overall harvest yields.

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Two men speak into microphones, surrounded by cannabis plants and grow equipment in a well-lit indoor setting.

Dude Grows Podcast with Quest

Are you using residential dehumidifiers in your grow room? QUEST product manager Clif Tomasini joins the Dude Grows Show to explain why specialized equipment is essential for plant health. Learn about the importance of dehumidifier durability, proper sizing for transpiration rates, and why redundancy is the secret to protecting your crop from pests and mildew.

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Green leaf with powdery white mildew spots and visible veins.

Control Humidity to Best Fight Powdery Mildew

Powdery mildew thrives in high moisture environments, posing a major threat to crops. Instead of relying on pesticides, focus on environmental control. By maintaining relative humidity at 50 percent or lower, you can prevent mold at the source. Properly sizing a commercial-grade dehumidifier to match your plant transpiration rates is the most effective defense.

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