Shelf life describes how long dried flowers and herbs retain their quality. They are not fresh food that spoils quickly – with proper storage, they remain good for many months. However, aroma and efficacy profile change over time as natural processes continue.
What influences shelf life
The same factors as for storage are decisive: light, heat, air, and moisture. Stored in a dark, cool, airtight place and at stable humidity, material ages significantly slower. Over time, terpenes evaporate (the aroma becomes flatter), and cannabinoids slowly convert – some of the THC, for example, into the calmer CBN. This is not "spoiling" but a gradual shift.
Signs of aging
Aged material often smells weaker or "hay-like," appears drier and more crumbly. As long as there is no mold and no musty, unpleasant smell, it is usually only qualitatively weaker, not bad. If something smells or looks like mold, the rule is: do not use. Freshness is best preserved by consistently good storage conditions from the start.
Frequently asked questions about shelf life
How long do flowers last?
Well stored, many months to over a year. Aroma and efficacy profile gradually shift but do not suddenly disappear.
What happens during aging?
Terpenes evaporate, the aroma becomes flatter, and some of the THC slowly converts into the calmer CBN.
How do I know if something is bad?
By mold or a musty smell. Then it should no longer be used. Only a weaker aroma alone, however, is harmless.

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Storage
Mold