Best humidity for cannabis storage
Cannabis flower holds quality at 58% to 62% relative humidity (RH) and 60°F to 70°F. Below 55% RH the flower dries, trichomes break off, and terpenes leave the jar. Above 65% RH mold, mildew, and rot start. Light and heat degrade THC, so store in the dark.
Two-way humidity packs hold the range. They add moisture when the container is dry and absorb moisture when the container is wet. A pack plus an airtight jar is the full setup.
Best Humidity for Cannabis Storage at Room Temperature: A Comparison Review
1. Boveda 62%: pick first
Boveda 62% is the standard for cured flower. The pack is a saturated salt solution inside a membrane. It holds 62% RH in a sealed container.
best humidity for cannabis storage in a fridge
- Sizes: 4 g, 8 g, 67 g, 320 g.
- Dose: one 8 g pack per 1 oz (28 g) of flower. Use more packs for larger jars.
- Life: 2 to 4 months in a sealed jar. The pack turns stiff and crusty when spent.
- Cost: about $1 to $2 per 8 g pack in multi-packs.
62% suits flower you smoke or vape and flower you press. It keeps the bud pliable.
Best Humidity for Cannabis Storage in a Fridge
2. Integra Boost 62%
Integra Boost 62% is the second pick. Each pack ships with a card that changes color when the pack is spent. Sizes: 4 g, 8 g, 67 g. Same 62% target. Some users report less salt smell than Boveda in the first days.
3. Boveda 58%
58% RH suits vape pens and dry climates. Vaporizers work with drier flower. The lower number also gives a margin in humid states, where a 62% pack can push a wet jar toward 65%.
4. Integra Boost 55%
55% RH is the low end for flower. Use it for short storage, for a jar that arrived wet, or for pre-rolls. Below 55% the cure stops.
Containers that hold the range
- Glass Mason jar with a metal lid: airtight, cheap, easy to burp.
- CVault: stainless steel, latches, holds a Boveda pack in the lid.
- Grove Bags: terpene barrier film, no burping needed.
Skip plastic sandwich bags and ziplock bags. They pass air, and static pulls trichomes off the flower.
Check the number
Put a digital hygrometer in the jar. Calibrate it with the salt test: 1/2 cup salt, 1/4 cup water, sealed container, 75% RH after 12 hours. Read the jar after 24 hours. Adjust pack size if the number sits outside 58% to 62%.