Quick answer
Take the pack out of its outer wrapper, drop it into an airtight jar with your dried and cured flower, and close the lid. Use one 8 g pack per ounce, one humidity level per jar, and nothing else in the jar with it. Do not open the pack or wet it. Replace it when it is spent.
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A humidity pack is about the simplest tool in cannabis storage, and most of the problems people have with one come from three things: the flower went in too wet, the pack is the wrong size for the jar, or the jar does not seal. Here is the whole routine, start to finish.
Before you start: is the flower ready?
A pack holds flower that is already dried. It does not dry wet buds. If small stems bend without snapping, or the jar feels damp an hour after you close it, the flower needs more drying first. Use this check: how to tell weed is dry enough to jar.
How to use a humidity pack, step by step
- Pick the size. Match the pack to the weight of flower in the jar. The table below has the sizes.
- Remove the outer wrapper. The clear overwrap keeps the pack fresh in storage. Take it off. Leave the pack itself sealed. Never cut it open.
- Put it in an airtight container. A glass jar with a good lid is ideal. Drop the pack in with the flower.
- Close the lid tightly. The pack can only manage the air inside a sealed space. A loose lid means it is trying to humidify the room.
- Let it settle. Give the jar a day or two before judging the result. Open it as little as you can.
- Replace the pack when it is spent. See when to replace a humidity pack for the signs.
Which size for which jar
| Flower in the jar | Pack size |
|---|---|
| 1/8 oz | 1.5 g |
| 1/4 oz | 3 g |
| 1/2 oz | 4 g |
| 1 oz | 8 g |
| 1/2 lb | 63 g |
In between sizes, go up, not down. More detail in how many packs per ounce and which pack for which jar.
Six mistakes to avoid
- Jarring wet flower. The most common one. Dry first, then pack.
- Using a pack that is too small. It runs out early and the jar drifts dry.
- Mixing humidity levels or products. Keep one humidity level per jar, and do not combine a pack with other humidity products. They work against each other.
- A jar that is far too big. A lot of empty air means more work for the pack. Fill jars about three quarters full.
- Soaking or microwaving the pack. Replace a spent pack with a fresh one instead.
- Leaving unused packs out. Keep spares sealed in their bag until you need them.
How do you know it is working?
The buds tell you first. They should feel springy, not brittle, and break apart without turning to dust. If you want a number, put a small hygrometer or a humidity indicator card in the jar. Here is how to read an indicator card. For cannabis the target is 62%, and anything from 58% to 62% is a good place to be. More on the number in 58% vs 62%.
One pack per ounce jar
Humidi-Cure 62% is a two-way pack with a plant-fiber core. It gives moisture when the jar is dry and takes it back when the jar is humid. No liquid or gel inside, so there is nothing to leak onto your flower.
Get 20 × 8 g packsSee all sizes
Any 2 boxes save 10%, and U.S. orders of $40 or more ship free.
Frequently asked questions
Do you take the plastic off a humidity pack?
Take off the clear outer wrapper only. The pack itself stays sealed. Never cut it open.
Can a humidity pack touch the weed?
Yes. The pack is made to sit in the jar with the flower.
How many humidity packs do I need per jar?
Go by the weight of flower: one 8 g pack per ounce, a 4 g pack for half an ounce, a 1.5 g pack for an eighth.
Can I use a humidity pack while curing?
Yes, once the flower is dry enough to jar. A pack steadies the jar between burps. See how to burp jars.
