Boveda packs keep a dispensary humidor at a steady relative humidity (RH) by releasing and absorbing moisture as conditions shift. For cannabis flower, 62% RH is the standard pick and 58% RH suits shops that want a drier texture or that already run humid rooms. A sealed container, the correct pack count, and a replacement date on the label matter more than anything else.
What do Boveda packs do inside a humidor?
A Boveda pack holds a saturated salt solution inside a breathable membrane. When RH in the container drops, the pack releases water vapor. When RH climbs, the pack absorbs vapor.
boveda packs for dispensary humidor
That two-way action is why a pack cannot overshoot the way a wet sponge or a hydration stone can. The pack aims at one number and holds it.
The catch: two-way control only works in an airtight space. A pack sitting in open air dries out and stops working.
how to control humidity in cannabis humidor
58% or 62% RH: which one for your flower?
Most dispensaries run 62% for whole flower and 58% for ground product or pre-rolls.
- 62% RH: keeps buds spongy and slows terpene loss in jars, bags, and retail displays. This is the default for smokable flower.
- 58% RH: gives a drier, less sticky feel that many customers prefer for joints and vape prep. It also works in humid rooms where ambient air pushes RH up.
- Above 65% RH: mold and mildew risk climbs. Cigar humidors run 69% to 72%, and those numbers are wrong for cannabis flower.
- Never mix levels in one container: a 58% pack and a 62% pack fight each other, and both wear out faster.
How many Boveda packs does a container need?
Pack count tracks the air volume in the container and the weight of flower, not the container's label size. Boveda publishes a size chart, and these are the common dispensary ratios.
- 1 ounce of flower in a sealed jar: one Size 8 pack.
- Half pound to one pound in a tote or bin: one Size 67 pack.
- Bulk vaults and large totes: Size 320 packs, scaled up with the number of pounds inside.
Headspace counts too. A jar filled a quarter of the way holds far more air than a full one, so it needs more pack capacity. When in doubt, size up rather than down.
Where should packs sit in the humidor?
- Lay the pack on top of the flower or against the side wall. Moisture moves through air, so packs need open space around them.
- Boveda packs are food-safe and can touch flower. They add no flavor, no odor, and no chemicals.
- Skip the bottom of deep bins. A pack buried under two pounds of bud does little for the top layer.
- Keep lids closed. Each opening swaps humidified air for room air.
- Add a hygrometer to confirm conditions, not to control them. The pack does the controlling.
When do you replace a Boveda pack?
Replace a pack when it turns stiff and crunchy with no soft spots. A working pack feels pliable.
In a sealed container that stays closed, a pack lasts two to four months. Containers opened all day during retail hours burn through packs faster.
Do not recharge packs with distilled water, and do not add water to the container. Boveda says the salt mix and membrane degrade, and a recharged pack can drift off its target RH.
How do you size packs for bulk backstock?
Bulk flower in a walk-in vault behaves like one giant container. Count total pounds, then scale pack capacity to that number instead of dropping a single pack in the corner.
Split large volumes across several sealed totes rather than one open bin. Smaller sealed spaces hold RH with less pack capacity, and a single bad lid will not dry out the whole stash.
Many state testing rules set a water activity limit for flower as a mold safeguard. Keep RH in the 58% to 62% band and water activity lands where labs and regulators expect it.
How do you set up a dispensary humidor?
- Pick one RH for each product type. 62% for whole flower, 58% for ground flower and pre-rolls.
- Match containers to volume. Glass jars for retail units, food-grade bins or stainless totes for backstock.
- Load flower and packs, then leave headspace so air can move.
- Seal the container and let conditions settle for a day before selling from it.
- Label each container with the pack date and RH level.
- Hold the room between 60F and 70F, away from direct sun. Heat drives terpene loss, and temperature swings move RH.
- Rotate stock first in, first out, and check packs on a set schedule.
Common humidor mistakes
- Adding orange peels, bread, or wet sponges. These invite mold.
- Packing jars to the rim with no air gap.
- Using packs in open display trays where control cannot hold.
- Storing flower next to a back-room heater or a sunny window.
- Leaving dead packs in the container and assuming they still work.
- Buying one pack size for every job instead of matching size to volume.
Frequently asked questions
Can a Boveda pack touch cannabis flower?
Yes. The packs are food-safe and do not change the smell, flavor, or cannabinoid content of the flower.
Does Boveda add moisture to flower that is too dry?
It can, but the process is slow. A pack brings flower back toward its target RH over days, not hours. It cannot restore terpenes that already evaporated.
Is 58% or 62% better for pre-rolls?
58% is the usual pick. Drier flower grinds and burns with less clogging, and pre-rolls sit in paper where higher moisture encourages mold.
Do Boveda packs work in a display case?
Only if the case seals. An open case exchanges air with the room all day, so the pack cannot hold a target and dries out within weeks.
What temperature should a dispensary humidor run?
60F to 70F is the working range. Below that, flower stops absorbing moisture well. Above it, mold risk and terpene loss both rise.
Good humidity control is boring and repeatable: one RH per product type, correct pack size, sealed containers, and a replacement date on the label. Shops that track those four things hand customers the same flower quality on Friday as they did on Monday.