First flush refers to an early seasonal harvest of new growth. You often see it in descriptions of Darjeeling tea, where harvest periods help distinguish different batches. It is not a universal word meaning the best tea in every category.
A harvest term, not a brewing instruction
Flush concerns the plant's growth and picking season. It does not mean the first time you pour water over a tea bag, nor does second flush mean a second brewing of the same leaves.
The timing and characteristics depend on the growing region and conditions. Read the producer's explanation for the particular tea rather than assigning one calendar date to every first-flush product.
What else belongs on the label?
Origin, garden or producer, harvest year and tea style can help put the term in context. First flush without that supporting information gives you only part of the story.
Do not assume the harvest term guarantees a flavour you will enjoy. A description of the actual batch and a small quantity to try can be more useful than choosing by the phrase alone.
Does it apply to herbal infusions?
Herbal ingredients also have harvest seasons, but they do not all use the same commercial language as Darjeeling tea. A herbal product can be clearly described without carrying a first-flush label.
If you want to know when a herbal ingredient was harvested or packed, ask about that specific product. Avoid treating a best-before date as a harvest date: they describe different things.
For the cupboard at home, remember the straightforward distinction. Flush describes growth and harvest; infusion describes what you do with the ingredient when preparing a drink.
Related reading: Where Is Herbal Tea Made? Origin and Preparation.
Further reading: UK Tea & Infusions Association: Darjeeling harvests.
Explore our free Herbal Tea Wellness Guide for more about K&M Herbs. For a product question, contact us.