Dried herbs are commonly given a shelf life of roughly one to two years from production, if they are packed well and stored cool, dry and away from light. Whole and cut leaf usually last longer than powder.
Dried herbs rarely become unsafe quickly when kept dry. What changes is quality: colour fades, aroma weakens and moisture can creep up. The shelf life on a certificate is the supplier's judgement, so agree it in your spec.
What shortens shelf life
- Moisture: herbs that are not dried enough, or that pick up humidity, can grow mould and cake.
- Light: sunlight and bright storage lights fade green colour.
- Oxygen: exposure to air oxidises aromatic oils, especially in powders.
- Heat: warm stores and hot containers drive off volatile oils.
- Insects: stored product pests can infest herbs kept for long periods.
- Grinding: powder has far more surface area than leaf, so it loses aroma and colour faster.
Rough guide by form
These ranges are illustrative only. Actual shelf life depends on the herb, its moisture, the pack and the storage.
- Whole leaf and roots: often the longest, commonly up to two years or more for roots in good storage.
- Cut and sift leaf: commonly one to two years.
- Powders: often one year or a little more, sometimes less for strongly aromatic herbs.
- Steam-sterilised material: similar to untreated, as long as it is dried properly after treatment and packed clean.
How to protect shelf life
Shelf life is set at the factory, not in your warehouse. A herb packed at the right moisture into a lined, sealed bag starts well. Our article on how dried herbs should be packed covers the options.
Put a moisture limit in your spec, and where your customer cares, a water activity limit too. Store at your end in a cool, dry place off the floor. Rotate stock first in, first out.
Plan purchases around the harvest. Herbs bought soon after harvest give you more time before the date runs out than material that has sat in a trader's store for months. Our harvest season guide helps with timing.
What to put in writing
Your own market may have labelling rules for date marking on retail packs. Check those with your food authority.
- Production or packing date and best before date on every bag label.
- The shelf life the supplier guarantees and the storage conditions it assumes.
- Maximum age of the lot at the time of shipment.
- Moisture and, if relevant, volatile oil or colour checks at dispatch.
How we help
We check packing dates and lot age before shipment, so old stock is not passed off as fresh crop. Moisture and quality are tested on the actual lot at an NABL-accredited lab before you release payment. Ask for a free sourcing review.