Pick the humidity pack by the weight of flower in the jar. A 1 g pack covers up to 3.5 g (an eighth), a 4 g pack covers up to 14 g (a half ounce), an 8 g pack covers up to 28 g (a full ounce), a 62 g or 67 g pack covers up to 1 lb, and a 320 g pack covers bulk loads of 5 lb or more. Every size holds the same relative humidity inside a sealed container, so pack size never changes the target percentage. Size only sets capacity: how much flower one pack can serve and how long it lasts before it dries out.
humidity packs for dry weed rehydration
Size chart for flower
- 1 g pack: up to 3.5 g of flower
- 4 g pack: up to 14 g
- 8 g pack: up to 28 g
- 62 g or 67 g pack: up to 1 lb (453 g)
- 320 g pack: up to 5 lb
Brands label sizes by pack weight, not by humidity level. Boveda and Integra Boost use the same sizing at the small end, then split at the large end with 62 g and 67 g packs.
How many packs you need
Use one pack for a container filled to its rating. For a jar holding more flower than the chart allows, add another pack of the same size instead of forcing in a larger one. Two 8 g packs in a two-ounce jar beat one 62 g pack that will not fit. Extra packs extend service life and add moisture buffer. They do not push humidity above the rating, because these packs absorb moisture as well as release it.
Which humidity level to choose
Size and percentage are separate choices. A 58% pack suits flower you grind and vape soon. A 62% pack suits long-term storage and keeps buds spongy. Both are two-way packs and both work in glass. Do not mix 58% and 62% packs in one jar. The result settles between the two, and neither pack performs as designed.
cannabis humidity control packs
Setup steps
- Weigh the flower on a kitchen scale so you know the load in grams.
- Choose the pack size from the chart above.
- Fill an airtight glass jar no more than three-quarters full, leaving headspace for air.
- Drop the pack on top of the buds. Do not bury it or press it into the flower.
- Seal the lid and store the jar at 60 to 70 F away from light.
- Open the jar every two to four weeks to check the pack and the buds.
- Swap in a new pack when the old one turns stiff, crisp, or dry at the edges.
Signs the pack is spent
- The pack feels hard or crunchy instead of soft and gel-like
- Buds feel dry and brittle after two weeks sealed
- The pack sat in a container that was left open
An 8 g pack in a sealed ounce jar covers about two to four months of repeated opening. A pack in a jar you open each day will die faster, so keep a spare on hand.