Most of us have been taught that tea needs boiling water. Pour, steep, drink. But what if that approach was actually undermining the very benefits you were brewing for?
Cold brewing — the practice of steeping herbs in cold or room temperature water over an extended period — is one of the most underrated preparation methods in herbal wellness. And for certain botanicals, it is simply the better way.
What is cold brewing?
Cold brewing is the process of steeping herbs, flowers or botanicals in cold or room temperature water for an extended period — typically anywhere from 2 hours to overnight. No heat. No hurry. Just time and water doing their quiet work.
The result is a smoother, more nuanced brew that is often gentler on the stomach and richer in certain beneficial compounds than its hot-brewed counterpart.
Why cold brew instead of hot water?
Heat is efficient — it extracts quickly. But efficiency comes at a cost.
High temperatures can degrade delicate volatile compounds, destroy heat-sensitive antioxidants and alter the flavour profile of delicate flowers and herbs. Cold brewing sidesteps all of this. The slow, gentle extraction preserves a wider spectrum of the plant's natural compounds — including those that would otherwise be lost to heat.
For botanicals rich in delicate flavonoids, antioxidants and volatile aromatic oils — like hibiscus, rose petals, spearmint and lemongrass — cold brewing is particularly beneficial.
Which tisanes are best cold brewed?
Not all herbs benefit equally from cold brewing. Here's a simple guide:
Best cold brewed:
- Hibiscus — extracts a deep ruby colour and tart flavour without bitterness
- Rose petals — preserves delicate floral notes that hot water can overwhelm
- Spearmint — cool, clean and refreshing when cold brewed
- Lemongrass — bright and citrusy, softer than hot brewed
- Herbivibe (our women's wellness blend) — formulated specifically for cold brew extraction for maximum benefit
Best hot brewed:
- Ashwagandha and Shatavari — roots and dense botanicals need heat for full extraction
- Milk Thistle seeds — require simmering for proper release of active compounds
- Carom seeds and cumin — release their volatile oils better with heat
How to cold brew your tisane — step by step
- Add 1 tablespoon of your chosen tisane to a clean glass, jar or bottle
- Pour cold or room temperature filtered water — approximately 250–300ml
- Stir gently to ensure all the botanicals are submerged
- Cover and place in the refrigerator
- Steep for a minimum of 2 hours — overnight gives the best results
- Strain and enjoy chilled, or let it come to room temperature
That's it. No boiling, no timing, no watching the kettle.
Tips for the best cold brew:
Use filtered water where possible — the mineral content of tap water can affect the flavour of delicate floral blends.
Don't skip the steeping time. Two hours is the minimum but overnight is where the magic really happens — the flavour deepens and the extraction is more complete.
Cold brewed tisanes can be stored in the refrigerator for up to 24 hours — make a batch the night before and it's ready when you wake up.
Does it taste different?
Yes — noticeably so. Cold brewed tisanes tend to be smoother, less bitter and more naturally sweet than hot brewed versions. The absence of heat means tannins are extracted more slowly, resulting in a gentler flavour that many people find more enjoyable — especially for daily drinking.
Herbivibe, our women's wellness tisane, tastes particularly good cold brewed and served chilled — almost like a sophisticated herbal iced drink rather than a medicinal brew.
All Potion Power tisanes are zero additive, formulated by a qualified food researcher and crafted with care for everyday wellness.