Boveda 62% is the top pick for most cured cannabis flower. It holds a sealed jar at 62% relative humidity, which keeps buds flexible and slows mold. The criteria for choosing any Boveda pack come down to four things: target relative humidity, pack size versus container volume, the stage of your cure, and the type of container you use. Get those right and the pack runs itself.
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What Boveda Packs Do
A Boveda pack is a two-way humidity controller. It releases water vapor when the air in the container is too dry, and it absorbs water vapor when the air is too wet. That differs from a silica gel pack, which only pulls moisture down. The pack holds a specific relative humidity, and it keeps working until the pack turns rigid or crunchy. At that point, replace it.
Best Alternatives to Humidity Packs for Cannabis: A Real Comparison
For cannabis, the goal is to keep flower in a range where terpenes stay intact and mold does not start. Boveda does not cure weed. It maintains the moisture level you already reached during curing.
cannabis humidity pack size guide
Pick the Right Relative Humidity
Boveda sells packs at 58%, 62%, and 72% relative humidity. The right one depends on what you plan to do with the flower.
62% Relative Humidity
- Pros: The standard for cured flower. Keeps buds spongy without feeling wet. Works for long-term storage in jars and bags.
- Cons: In a humid room, a 62% pack may work harder to pull moisture down. Some users prefer 58% for vaping.
Use case: Most home growers and daily smokers. If you store flower for months, start here.
58% Relative Humidity
- Pros: Slightly drier flower that grinds well and burns clean in a joint or vaporizer. Lower mold risk in warm rooms.
- Cons: Buds can feel crisp after a few weeks. Not ideal for long cures where you want slow moisture equalization.
Use case: Short-term storage, pre-roll prep, or a dry climate where 62% feels too damp.
72% Relative Humidity
- Pros: Brings overly dry flower back to a workable moisture level. Useful if you left a jar open.
- Cons: Too high for long-term storage. Mold and mildew risk climbs when flower sits above 65% relative humidity.
Use case: Rehydrating dry buds for a few days, then switch to 62%. Do not leave 72% packs in a jar for weeks.
Match Pack Size to Container Volume
Boveda publishes size charts, and the basic rule is simple: more headspace and more flower need a bigger pack. A pack that is too small will not hold the target humidity across the whole jar.
- 8g pack: Up to about one ounce of flower in a quart jar or small Grove Bag.
- 67g pack: Up to about one pound of flower in a gallon jar, turkey bag, or small tote.
- 320g pack: Up to about five pounds of flower in a large tote or multiple bags.
These are starting points. If your container has a lot of empty space, size up. If the pack turns rigid in a week, it is too small for the job.
Step-by-Step: Using Boveda in a Jar
- Finish your cure first. Boveda maintains moisture, it does not remove chlorophyll or fix a hay smell.
- Fill an airtight glass jar with flower. Leave about 20% to 25% headspace so air can move.
- Drop in the Boveda pack. Do not open the pack, cut it, or wrap it in plastic. The whole pack goes in.
- Seal the lid. Keep the jar in a dark place at room temperature, between 60°F and 70°F.
- Check after 24 hours. The pack should feel soft and plump. If it feels stiff, add a second pack of the same RH.
- Open the jar once a week for the first two weeks to check for mold or off smells. After that, leave it alone.
- Replace the pack when it turns rigid or crunchy. Boveda does not recommend recharging packs.
Boveda in Grove Bags and C-Vaults
Grove Bags
- Pros: The bag film already regulates some moisture, so a small Boveda pack can fine-tune the RH. Good for large harvests.
- Cons: You cannot see the flower without opening the bag. Too many packs can push the RH above target.
Use case: Long-term storage of a full harvest. Use one 67g pack per pound in a 1 lb Grove Bag.
C-Vault
- Pros: Rigid container with a lid, stackable, and easy to label. Holds humidity well.
- Cons: More expensive than glass jars. You still need to match pack size to volume.
Use case: Head stash or commercial samples you open often. A 67g pack fits a medium C-Vault.
Common Mistakes
- Using a 58% pack for a long cure and then wondering why buds crumble.
- Putting a 72% pack in a jar and leaving it there. That is a mold risk.
- Using one small 8g pack for a half-pound of flower. The pack cannot keep up.
- Sealing the jar with a wet paper towel or orange peel. That spikes humidity and invites mold.
- Opening the jar every day. Each open lets the pack work harder and shortens its life.
Use-Case Recommendations
For a personal stash of one ounce, use one 8g Boveda 62% in a quart jar. For a half-pound to a pound, use a 67g pack in a gallon jar or Grove Bag. For a full harvest of five pounds, use a 320g pack in a tote. If you live in a dry climate and your flower feels brittle, step up to 62% from 58%. If you live in a humid climate and you see condensation, drop to 58%. Always keep the container sealed and out of direct light.