Cured cannabis lives or dies on humidity. Store it too dry and the terpenes flash off, the weight drops, and the smoke turns harsh; store it too wet and mold risk climbs and the structure collapses. The published target for dried botanical flower is 62% RH — and holding it precisely, without adding salt or moisture to the flower, is exactly what a good humidity pack is for.
This guide explains why 62% RH is the cured-flower standard, why a salt-free fiber pack matters, and which Humidi-Cure 62% size matches your jar.
Why 62% RH preserves terpenes and weight
62% RH is the sweet spot for cured flower, herbs, and vape-concentrate inputs. Below it, volatile terpenes evaporate — aroma and flavor go with them, and the jar literally loses sellable weight. Above it, the moisture invites mold and softens the bud structure. Humidi-Cure 62% is a two-way pack that absorbs and releases to hold the printed RH at ±2% inside any sealed jar, mylar pouch, or storage bin.
Why salt-free beats slurry packs
Many humidity packs use a salt slurry that can leak, leave residue, or deposit salt on the flower — and once a pack over-saturates, that slurry has nowhere good to go. Humidi-Cure 62% is salt-free and terpene-preserved: a liquid-less natural fiber with no slurry, no leakage, and no salt residue on the bud. The fiber medium is compostable for a biodegradable end-of-life, which matters for clean-label brands.
Jar sizing: match the pack to the flower
| Humidi-Cure size | Flower | Container |
|---|---|---|
| 1.5 g | 1/8 oz | 1–2 oz jar |
| 3 g | 1/4 oz | 2.5–5 oz jar |
| 4 g | 1/2 oz | 5.5–7 oz jar |
| 8 g | 1 oz | 8–10 oz jar |
| 63 g | 1/2 lb | 16–24 oz container |
The rule of thumb: one 8 g pack per quart-sized jar, or one 63 g pack per pound of dried product. Size up if the jar is only half full — more air means more to condition.
How long a pack lasts
Approximately 3 months in normal use. The biggest factor by far is how airtight the jar is and how often the lid comes off — a sealed jar opened occasionally runs near the full window, while a daily-access jar runs shorter. Drop in an RH indicator card and replace the pack when the center dot reads outside the 60% segment for more than 24 hours.
Frequently asked questions
What humidity is best for cured cannabis?
62% RH preserves terpenes, holds weight, and prevents mold. Humidi-Cure 62% holds it at ±2%.
What size pack for a quart jar?
One 8 g pack per quart-sized jar. For a half-pound, use a 63 g pack.
Will the pack leave salt on my flower?
No. Humidi-Cure 62% is salt-free and liquid-less — no slurry, no residue on the bud.
How long does a pack last in a jar?
About 3 months, driven mainly by jar airtightness and how often it is opened.
Keep your flower at 62% RH
Match the pack to your jar and lock in terpenes, weight, and freshness — salt-free and compostable.
Shop Humidi-Cure 62% — from $9.99 · add an RH Indicator Card to know when to replace.
Related reading: Dispensary & Cultivator Bulk Storage at 62% RH · Dried Herbs & Botanicals: Terpene Preservation
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