Lowering humidity in a grow tent during the drying phase is all about removing excess moisture while keeping the airflow gentle so you don’t overdry your buds.
Oscillating fans: Point them toward tent walls or the space between plants—not directly on buds—to prevent uneven drying.
Exhaust fan: Run it on a medium speed 24/7 to constantly replace humid air with drier air from outside the tent.
Passive intake vents: Keep them open so air can flow in freely when the exhaust fan pulls air out.
Portable dehumidifier for grow room: Place it inside the tent only if it fits safely without overheating, or outside the tent in the same room to dry incoming air.
Target RH: Keep it around 50–55% RH for the first few days, then lower toward 45–50% RH as buds get closer to final dryness.
If your tent is in a very humid room, dehumidifying the room air is often more effective than putting the dehumidifier in the tent.
Ideal range: 60–70°F (15–21°C) while drying.
Warmer air holds more moisture—if temps rise too much, RH may drop too low and cause overdrying.
Use your exhaust fan speed and/or a small AC unit in the grow room to stabilize both temp and RH.
If you’ve got a lot of plant material, hang smaller branches instead of whole plants—this reduces the total moisture load in the tent.
Avoid drying in the same space as recently watered plants (veg room, mother plants), as they’ll keep releasing humidity.
Humidity controller: Plug your dehumidifier and exhaust fan into a controller with a hygrometer to keep RH steady automatically.
Carbon filter: Run your exhaust through a carbon filter to keep odor down while moving air.
Hangzhou Hongtai Electrical Appliance Co., Ltd.
info@seedmaxtech.com
