The shelf life of herbal tea can vary depending on the specific herbs used, how it's processed and packaged, and how it's stored.
Generally speaking, herbal teas are often safe to consume well past their best before date if they have been stored in a cool, dry place away from direct sunlight.
If the herbal tea is only a few months past its best before date, it's very likely that it is still safe and delicious to drink. When it is stored well, your herbal tea can actually be enjoyed for up to 6 months after the best before date on the label.
When to discard your tisane?
However, if the tea has been stored improperly such as being exposed to moisture or extreme temperatures, or if there are any signs of spoilage such as mold, an off smell, or a change in appearance, it's best to discard it.
Always use your judgment and sensory cues when deciding whether to consume expired herbal tea. When in doubt, it's safer to err on the side of caution and dispose of it.