Curing Cannabis: Step-by-Step Guide & Tips

Curing Cannabis: The Complete Guide

Dried doesn’t mean finished: only curing lets cannabis flowers develop their full aroma, makes the smoke smoother and keeps them fresh much longer. Skip this step and you give away a large part of the quality you’ve worked months for. In this guide you’ll learn what actually happens during curing, how to go about it step by step and which mistakes to avoid.

The method works for dried flowers from cannabis seeds as well as plants from hemp clones.

What is curing cannabis?

Curing means storing already-dried cannabis flowers in a controlled way, with targeted airing, over a longer period. The goal is strongly scented, intensely flavoured flowers – comparable to aged wine, which is clearly ahead of its young counterparts in quality. Technically, curing is a controlled maturation at moderate humidity and temperature rather than a classic anaerobic fermentation like beer or dairy products.

You can start curing as soon as the flowers are dry and stable enough to handle. Important: if you jar flowers that are too moist, you risk mould; if you dry them for too long, the maturation process never really gets going.

What you need for curing

Clean, airtight jars – the classic choice, as glass is odour-neutral, releases no plasticisers and is easy to clean
Hygrometer (ideally a mini hygrometer per jar) – not strictly necessary, but makes it much easier to keep humidity under control
Alternatively: special curing bags with humidity regulation, which partly make daily opening and airing unnecessary

Before filling, jars should be disinfected (e.g. with isopropyl alcohol or hot soapy water) and dried completely.

Curing cannabis step by step

Fill loosely: place buds loosely in the jars, never press or pack them – compressing damages the structure and makes monitoring harder
Fill jars only about ¾ full: the remaining air pocket is needed for circulation and gas exchange when you air the jars later
Label: note the strain, harvest date and the start of drying and curing – this makes monitoring easier and helps you optimise the next run
Store dark and cool: direct sunlight demonstrably destroys terpenes and cannabinoids, so the jars belong in a dark, cool place
“Burping”: in the first one to two weeks, open the jars daily for about 10–15 minutes to let excess moisture escape and fresh oxygen in
Watch the moisture: if it smells musty or damp when you open the jar, that’s a warning sign – let the flowers dry briefly outside the jar instead of letting the problem continue inside
Reduce the frequency: if humidity stays stable in the target range, you can gradually burp less often after the first week

The right values: humidity and temperature

The two key levers in curing are relative humidity (RH) and temperature:

Relative humidity: ideally in the range of 58–62%, with around 62% sometimes given as the target
Temperature: as constant as possible at 18–21 °C, never above about 22 °C
Optional humidity packs help keep the humidity in the jar stable in the target range

How long should you cure?

A sensible minimum is usually two to four weeks. After about three weeks, enough moisture has generally left the flowers that maturation continues only very slowly. As a rule: the longer you cure, the smoother and more aromatic the flowers taste – although three weeks are already enough to noticeably improve quality. With stable storage (cool, dark, right humidity), cannabis can be kept for up to 12 months without noticeable loss of quality, although aroma and effect may change slightly over time.

Common curing mistakes

Overfilling jars or pressing flowers in – makes monitoring harder, can damage trichomes and encourages damp spots
Jarring flowers that are too moist – the most common cause of mould during curing
Burping too rarely or not at all – without enough airing, mould is practically guaranteed
Storing different strains together – smells mix, and a problem (e.g. mould) can spread more easily to everything
Curing in the fridge – condensation and strongly fluctuating humidity make the fridge about the worst place for curing
Neglecting checks – especially in the first few days, jars should be checked for signs of mould several times a day

If the first signs of mould appear, or a jar wasn’t filled under clean enough conditions, transfer the flowers to a new, clean jar right away so they can keep maturing in a sterile environment.

Conclusion

Curing is the often underestimated final step towards truly high-quality cannabis: jar the flowers loosely, burp consistently and keep an eye on humidity and temperature, and you’ll be rewarded with a much smoother taste, a more intense aroma and noticeably longer shelf life. Patience really does pay off here. That’s how you lay the foundation for especially aromatic CBD flowers.

Sources

Note: this article is for general information about plant cultivation only. Please observe the laws on growing and possessing cannabis that apply in your country or canton.