A Practical Guide to Brewing with Pu-erh, Yerba Mate, Rooibos & Beyond
Kombucha thrives best on a foundation of Camellia sinensis tea and sugar. That combination reliably feeds the bacteria and yeast that make Kombucha… well, Kombucha.
That said, once you’re an established brewer with healthy backup cultures tucked away in a SCOBY Hotel, experimenting with more exotic teas can be both fascinating and rewarding.
This guide explores some of the most commonly used “exotic” tea substrates for Kombucha, what makes them unique, and how to use them responsibly without stressing your culture.
Note: We recommend mastering regular Kombucha Tea BEFORE trying your hand at exotics.
A Quick Word on Experimentation (Read This First)
When brewing with exotic teas:
- Always keep backup cultures (keep a healthy SCOBY Hotel)
- Blend with traditional tea at first rather than going 100% exotic
- Watch fermentation closely for changes in speed, flavor, or SCOBY structure
- Taste is your best guide
Fermentation can increase the bioavailability of compounds in herbs and teas, but it also changes how the culture behaves. Think of these as advanced variations, not replacements for your base recipe.
👉 Learn How to Create your own SCOBY Hotel so you’ve always got backup cultures.
A Quick Word on Experimentation (Read This First)
When brewing with exotic teas:
- Always keep backup cultures (keep a healthy SCOBY Hotel)
- Blend with traditional tea at first rather than going 100% exotic
- Watch fermentation closely for changes in speed, flavor, or SCOBY structure
- Taste is your best guide
Fermentation can increase the bioavailability of compounds in herbs and teas, but it also changes how the culture behaves. Think of these as advanced variations, not replacements for your base recipe.
👉 Learn How to Create your own SCOBY Hotel so you’ve always got backup cultures.
Pu-erh Tea & Kombucha
Pu-erh is a post-fermented tea made from Camellia sinensis and traditionally produced in Yunnan Province, China. Unlike green or black tea, pu-erh undergoes microbial aging, which gives it its distinctive earthy character.
Why brewers love pu-erh:
- Naturally “living” tea with a long fermentation history
- Mild, smooth flavor despite its dark appearance
- Pairs beautifully with Kombucha’s acidic profile
Pu-erh tends to be gentler than it looks. Many brewers are surprised by its natural sweetness and rounded body. It’s best used as:
- A partial blend with black or green tea
- A body-builder in multi-tea blends
In traditional Chinese culture, pu-erh is often consumed intentionally rather than daily, which makes it a thoughtful companion to Kombucha experimentation rather than a constant base tea.
Yerba Mate & Kombucha
Yerba mate (Ilex paraguariensis) is not technically a tea, but a holly leaf native to South America. It’s deeply rooted in ritual, community, and shared experience.
Kombucha Mamma’s introduction to yerba mate came not through chemistry, but through ceremony: sharing a gourd, passing the bombilla, and building connection through eye contact and conversation. That communal spirit translates beautifully into fermentation culture.
What makes yerba mate interesting for Kombucha:
- Naturally contains caffeine
- Rich in polyphenols and antioxidants
- Produces a focused, sustained energy rather than a sharp spike
Yerba mate Kombucha tends to have:
- A slightly smoky, herbaceous flavor
- More perceived energy than black or green tea
Because of its stimulant profile, yerba mate is best used sparingly or blended, especially for those sensitive to caffeine.
Rooibos & Kombucha
Rooibos (“roy-boss”) is a naturally caffeine-free herbal infusion made from Aspalathus linearis, a plant native to South Africa.
It has a long cultural history and a naturally sweet, earthy flavor that appeals to brewers looking for caffeine-free alternatives.
Key considerations with rooibos:
- Not a true tea (no Camellia sinensis)
- Lacks some nutrients Kombucha cultures rely on
- Best used as a partial blend, not a sole substrate
Rooibos adds depth, color, and mild sweetness to Kombucha but can become overpowering if used alone or too heavily. Many brewers enjoy it as a background note rather than a lead player.
How to Use Exotic Teas Safely (Quick Tips)
- Start with 25–50% exotic tea, blended with black or green tea
- Monitor fermentation speed and SCOBY health
- Expect flavor shifts and subtle changes in carbonation
- Rotate back to traditional tea regularly to keep cultures strong
👉 Resources you might find helpful:
Exotic Teas & Kombucha FAQ
Can I brew Kombucha using only herbal or exotic teas?
Some brewers do, but it’s not recommended long-term. Most herbal teas lack nutrients Kombucha cultures need to stay robust. Blending is safer.
Is pu-erh tea good for Kombucha?
Yes. Pu-erh is a true tea and ferments well, especially when blended with black or green tea.
Does yerba mate Kombucha contain caffeine?
Yes. Yerba mate naturally contains caffeine, though many people experience it as smoother and more focused than coffee.
Is rooibos Kombucha caffeine-free?
Yes, rooibos is naturally caffeine-free, but it should be blended with traditional tea to support culture health.
Should beginners experiment with exotic teas?
Not right away. It’s best to master a standard Kombucha recipe first and build backup cultures before experimenting.
Final Thoughts
Exotic teas open the door to creativity, cultural exploration, and new flavor experiences — but Kombucha rewards patience and respect for its biology. Start slow, blend thoughtfully, and let your culture guide you.
When in doubt, return to the basics. They’ve carried Kombucha safely through centuries for a reason.
Hannah's Tea Blends at Wholesale
Jasmine Green Tea - Loose Jasmine Green Leaf
hoesernathooz
September 1, 2022 at 4:14 amThe blog was having really insightful content and was very helpful for me. Well done message as well as keep it up … Many thanks for sharing such a Helpful info.
Carolanne
February 18, 2018 at 1:10 pmHi! I have use half green tea and half rooibos for my kombucha tea, I guess that then, I must keep these scobies in a different scoby hotel?
Thank you!!!
Hannah Crum
August 27, 2019 at 11:19 amDepends on if they are forming well or not. We always advise keeping the strongest culture and tossing whatever is weak. To test it, squeeze the SCOBY between your thumb and forefinger – if it is easy to press through it, then toss. If it is firm and resilient, then keep it!
Maureen
December 14, 2017 at 3:45 pmGreat article. Any feedback on how a Scoby does with pure maté? In your experience, is maté close enough nutritionally for a Scoby to live on it exclusively?
Also, is it ok to use toasted maté, or do you recommend only using the un-roasted variety?
Hannah Crum
May 8, 2019 at 7:48 amMany producers have discovered that mate does not supply sufficient nutrients for the SCOBYs over time. Best to blend your mate with some black tea or green tea to ensure the health of your cultures. Another option would be to propagate SCOBYs in a hotel using tea and then use the SCOBYs for fermenting the mate Kombucha knowing they will not reproduce. Let us know how it turns out!
Mtgirl
November 6, 2017 at 6:50 amCan i use just Yerba mate in brewing my kombucha?
Hannah Crum
June 27, 2018 at 8:38 amYes! We recommend using an extra culture from your SCOBY Hotel just in case it doesn’t reproduce. Let us know how it turns out =)
H Fair
July 12, 2017 at 11:50 amHave you tried roasted yerba mate? I am curious about this as I have both roasted and unroasted available to me and some sites say not to use roasted but they don’t say why. Thank you for this great site!
Hannah Crum
May 23, 2018 at 6:40 pmWe have used both types of mate and they both make a delicious brew! Grab organic yerba mate here –> https://store.kombuchakamp.com/Yerba-Mate.html
Carolina Pelegrinelli
May 18, 2017 at 5:46 pmHi! I don’t know if you will still see this, but why not try..
I just started brewing kombucha.. i live in brazil and it is very hard to find it in here, so i decided to make my own.. i drink mate on a regular basis, and i wonder, can i make kombucha out of it? I have access to the pure thing, so ‘add in’ stuff wouldn’t be a problem.. does it work?
Black and green tea are not much common here, so they can get very expensive.. so even though I am really enjoying my kombucha, i don’t know if I will be able to continue brewing for too long due to the hole that is digging iny wallet..
Can you give any tips or adivice?
Thank you very much! Just found this blog and been reading like crazy.. thank you for sharing your knowledge! (:
Hannah Crum
May 3, 2018 at 5:41 pmYes! Yerba mate is a terrific substrate for Kombucha. There are also commercial versions of Mate Kombucha already in the marketplace. Find our Yerba Mate Kombucha recipe in The Big Book of Kombucha.
michelle
April 18, 2015 at 3:27 pmAny advise on whether or not to use powdered matcha green tea? How much would you use to black tea? Thanks
Hannah Crum
May 21, 2015 at 2:54 pmMatcha may be used in primary but in our experience does not produce good offspring, so use a culture from your SCOBY Hotel. We suggest 2TB per gallon.
Chad
April 15, 2014 at 8:59 pmHanna:
If you were to blend different teas together to make kombucha is there by chance a rule or rules one would use to know how much green tea to black tea etc. I might assume that it is a trial and error method but hope that you might have some insight?
Hannah Crum
April 21, 2014 at 2:39 pmTrial and error makes all the magic happen!
Ali
September 9, 2013 at 2:09 pmI was googling using Good Earth Tea in Kombucha and saw Patti’s post. I did my first batch with this tea and the SCOBY I got from a friend grew quite well. I left it for about 15 days and didn’t taste it before bottling it. It’s been bottled for about 5 days and I just tried it. It’s kind of sweet. I’m trying to figure out if its the sugar or the natural sweetness of the Good Earth Tea. It has a bit of a vinegar smell. Any advice would be appreciated.
Hannah Crum
September 17, 2013 at 6:36 amDo another batch with black tea and then compare the two. That will help you figure out if it is the tea or the sugar causing the sweetness.
Justin
August 6, 2015 at 2:42 pmIt’s definitely supposed to smell like vinegar and be a bit sweet..sounds good. But try the black tea too..I just keep trying all kinds of teas.
Kelle
July 22, 2013 at 4:10 pmI was reading about the Yerba Mate. I happen to have some Yerba Mate Chocolate. It says 2.5 g Propeitary Blend of yerba mate, cocoa seed, nutmeg seed, cinnamon bark, stevia leaf, clove seed. I used 3 black and 2 green tea bags in my first brew. Wondering if I could add a bag of this tea? thanks
Hannah Crum
July 29, 2013 at 5:51 pmWe use Yerba Mate in the Hannah’s Special Tea Blend, but based on the ingredients list provided, we wouldn’t recommend using this yerba mate for primary fermentation. Stevia doesn’t ferment and may lead to mold. Save it for 2F (flavoring stage).
Regina
July 10, 2013 at 6:54 amHas anyone used moringa tea to brew kumbucha?
Hannah Crum
July 29, 2013 at 6:18 pmIf you want to try it, use one of your babies from your SCOBY Hotel. We determine that a tisane is acceptable for primary fermentation if you can brew with it for 10 generations and it continues to produce healthy, viable cultures. Let us know how it turns out!
Dana
March 26, 2013 at 3:00 pmFascinating!! Thank you for sharing your knowledge and insite Hannah.
Chloe
January 27, 2013 at 6:35 pmHi Patti (if reading)
How did your batch of Kombucha taste with ‘Good Earth’ tea? I would like to know, thanks
Chloe
Patti
January 11, 2013 at 1:06 pmAloha Hannah! I am a newbie kombucha brewer, and am learning new things every day. I love your site & appreciate your contribution to the kombucha community. Thank you! I have successfully brewed three batches of kombucha using matcha green tea. I have a huge supply of Good Earth Sweet & Spicy Tea and Herb Blend (Original) and was wondering if it’s suitable for kombucha brewing. The ingredients list black tea first, followed by rosehips, cinnamon, lemongrass, papaya, peppermint, chamomile, anise seed, orange peel, jasmine tea, ginger root & orange oil. I know herbal teas and teas with essential oils should be avoided, but this blend has black tea. Your thoughts? Thank you so much for any assistance you can provide! ~Patti
Hannah Crum
January 13, 2013 at 2:07 pmYou can always set up an experimental batch to see how the mother behaves over time. Most of the ingredients sound like they will work fine with the Kombucha culture – the ones that might inhibit culture growth could be the peppermint and anise seed. If it doesn’t continue to grow robust cultures after the 2nd or 3rd batch, then it can be used to flavor the Kombucha in 2ndary fermentation. Report back with your findings!
Jason Miller
September 23, 2012 at 9:13 pmHi Hannah,
How do you become a master brewer?
Hannah Crum
September 27, 2012 at 10:16 pmPractice! How long have you been brewing KT?