Best Humidity for Cannabis Storage in a Fridge
The best relative humidity for cannabis in a fridge is 58% to 62%. This range limits mold growth. It also slows terpene loss. Cold temperatures slow decarboxylation. But cold air holds less moisture. A sealed container with a humidity pack controls RH.
best humidity for cannabis storage in a box
Our Pick: Boveda 58% RH
Boveda 58% is our top choice. It is a two-way humidity pack. It adds or removes moisture to hold 58% RH. The pack is food-safe. It works in a fridge. Boveda makes 58% and 62% packs. The 58% pack suits long-term storage. It prevents dryness. It also reduces mold risk.
Best Humidity for Cannabis Storage at Room Temperature: A Comparison
Option 2: Integra Boost 55% RH
Integra Boost 55% maintains 55% RH. It uses a salt-free formula. The pack is smaller than Boveda. It fits small containers. 55% RH is at the low end. It works for short-term fridge storage. It may dry cannabis over months. Replace the pack every 2 to 4 months.
best humidity for cannabis storage long term
Option 3: Boveda 62% RH
Boveda 62% holds 62% RH. This is the high end of the range. Use it if your fridge is very dry. It adds more moisture. But higher RH raises mold risk. Mold grows above 65% RH. Check your fridge temperature. Keep it at 34°F to 40°F.
Option 4: Hygrometer and Silica Gel
A digital hygrometer costs $10 to $20. It measures RH inside a jar. Silica gel lowers RH. You can add a small packet to a container. But silica gel absorbs too much moisture. It can dry cannabis below 55% RH. You must monitor daily. This method is not precise. It is not ideal for long-term storage.
How We Picked
We compared RH accuracy, two-way control, and food safety. Boveda and Integra Boost are food-safe. They hold RH within 1% to 2%. Both work in a fridge. Boveda 58% is the best balance. It prevents mold and dryness. Integra Boost 55% is a lower-cost option. Boveda 62% is for dry fridges. A hygrometer setup requires more work.