Short answer first: 62% relative humidity is the target most growers and shops use for storing dried cannabis. At that level, flower stays pliable instead of crumbling, while water activity stays low enough that mold and bacteria struggle to gain a foothold. A two-way humidity pack in a sealed jar holds that range for weeks, which is why it has become the low-effort default for anyone who wants storage to be simple.
best humidity packs for cannabis
What Does Cannabis Storage Humidity 62 Actually Mean?
It means the air inside your container carries 62% of the moisture it could hold at that temperature. Two-way packs are commonly sold at 62% and 58%; 62% suits flower you plan to use within a few months, and it keeps buds soft enough to grind easily.
Key Features
- Two-way humidity control that adds or absorbs moisture to hold 62%
- Air-tight container with a real gasket seal
- Hygrometer to confirm the reading inside the jar
- Packs sized to container volume rather than the amount of flower
- Odor containment so storage does not scent the whole room
- Rechargeable or reusable packs for fewer replacements
- Compact footprint that fits a drawer or cabinet shelf
Materials and Specs
Humidity packs hold a saturated salt solution inside a breathable membrane, typically potassium chloride for the 62% version. Because the membrane passes water vapor in both directions, the pack releases moisture when the jar runs dry and absorbs it when the jar runs damp. Containers are usually borosilicate glass or food-grade plastic with a silicone gasket and a latch. Glass does not hold odors; plastic is lighter and quieter. Sealed and kept out of direct light at a stable room temperature, a 62% pack holds its target, though big temperature swings will move the reading.
Is 62% Humidity Better Than 58%?
Neither is wrong. 62% keeps buds softer and easier on the hands, while 58% suits longer storage or devices that prefer drier material. Start at 62% and step down if the flower feels damp.
How Long Does Flower Stay Fresh at 62%?
In a sealed container with a working pack, most flower keeps good texture and aroma for several months, longer if it stays cool and dark. Swap or recharge the pack once it turns stiff or crunchy.
Shipping and Returns
Orders arrive in plain, discreet packaging with jars and packs cushioned against damage in transit. If anything shows up cracked, leaking, or not as described, contact support within the return window for a replacement or refund.