Water Kefir Grains

$19.90
Tax included

Grow your own refreshing, fizzy probiotic drink at home with our organic water kefir grains.

We use only certified organic ingredients and filtered spring water to cultivate healthy, active grains.

Water kefir is a reusable, perpetual culture that can be used again and again to brew naturally sparkling drinks that support digestive health.

Choose from:

  • 3 Tbsp fresh water kefir grains
  • 1 Tbsp dried water kefir grains


Each portion makes approximately 1 litre of probiotic water kefir every 24-48 hours.

Includes our comprehensive Water Kefir eGuide packed with instructions, tips, and recipe inspiration.

For best results, we recommend feeding your grains with our Water Kefir Complete Food.

Fresh water kefir grains are shipped every Monday (or Tuesday following a public holiday). Orders must be placed and paid for by 4 pm Saturday for shipment the following week.

Please choose: : Fresh grains
Quantity
In stock

  Security policy

Secure credit card, bank transfer or POLi payment!

  Delivery policy

Proudly support NZ Post/CourierPost!

  Return policy

We exchange or refund if you are not happy!

Guarantee safe & secure checkout

Water kefir is the vegan cousin of milk kefir and the caffeine-free alternative to kombucha. These live cultures can be used again and again to create refreshing, naturally fizzy probiotic drinks at home.

Easy to make and endlessly versatile, water kefir is a great way to support gut health while creating delicious homemade sodas, fruit ferments, and flavoured drinks.

How does it taste like?

Water kefir has a mildly sweet, slightly tart and refreshing taste similar to a very light, non-alcoholic cider. It is much less acidic and "funky" than kombucha and is naturally caffeine-free. 
The exact flavour profile changes and depends on how you ferment it. Because the plain base (1st fermentation with grains) is relatively neutral, it easily takes on whatever flavors you add to it. Many people bottle the plain kefir with fruit, juice, or herbs (2nd fermentation without the grains) for another 1–2 days. This adds natural fruity flavors and creates a fizzy, soda-like sparkle.


Fresh or dried grains — which should I choose?

Both work equally well, so it really comes down to personal preference.
Our dried grains rehydrate quickly and easily — 1 Tbsp of dried grains becomes approximately 3 Tbsp of active hydrated grains within 24 hours and can be used immediately to brew kefir, just like the fresh grains.

Dried grains are especially suitable for:

  • Rural deliveries
  • Shipping delays
  • Gifts
  • Long-term storage


They are shelf stable for up to 6 months before needing hydration and feeding.

Fresh grains are already fully hydrated and active, therefore they will need feeding soon after arrival.

Please note:

  • Fresh grains are shipped at the beginning of each week
  • Dried grains are shipped daily


Why choose our grains?

  • Fed exclusively with certified organic ingredients
  • Cultured using filtered spring water
  • Produced and packed in a certified kitchen
  • Grown by experienced kefir brewers with years of hands-on expertise


With proper care, your grains can last indefinitely.

What you will receive

Via CourierPost

  • 3 Tbsp fresh OR 1 Tbsp dried organic water kefir grains (please choose above)
  • Enough to brew approximately 1 litre of probiotic water kefir every 48 hours


Via email

  • Our comprehensive 20-page Water Kefir eGuide filled with instructions, recipes, troubleshooting tips, and FAQs
    Please look for an email with the subject line: [KoruKai Herb Farm] Files available for your order
  • Ongoing email support if you need help getting started or maintaining your grains


Making water kefir is simple, rewarding, and beginner-friendly — and we are here to help you succeed.


Shipping Info

  • Dried grains ship every day
  • Fresh grains ship every Monday (or Tuesday after a public holiday)
  • Pickup is available from Pigeon Bay — contact [email protected] to arrange collection


If you live at a rural address, please select rural delivery at checkout to avoid delays. We recommend dried grains for rural deliveries as they travel exceptionally well.

Ingredients: 3 Tbsp of fresh or 1 Tbsp dried organic water kefir grains

Customer Reviews

Based on 48 reviews
Write your review !
Ben on  Oct 21, 2025

Great Product

Very healthy grains that produce a great drink. I had a situation where I saw slime started forming and a vinegary smell. And Kai responded to my email explaining that my grains were hungry and needed feeding - And he was right. Very good customer service

Dan on  Aug 29, 2025

Great!

Delicious, my tummy loves the resulting kefir drink.

Cerrie on  Jul 2, 2025

Excellent!

Great purchase and thanks for the recipe book. Excellent service and communication.

Ness on  Nov 20, 2024

Great kefir grains

Great kefir grains, doing very nicely. Fast service from KoruKai. I found the info pdf very helpful even though I'm not new to using soda kefir.

JG on  Nov 14, 2024

Excellent

Kefir grains arrived in excellent condition. Currently producing a very vigorous fermentation.

Jo on  Oct 25, 2024

Pleased with kefir.

Very pleased with the Kefir, delivery time exceeded expectations, packaging well supported the Kefir. I would buy from KoruKai again without hesitation.

Emma Wood on  Oct 19, 2024

great success

Am having great success with my recently purchased kefir. Thank you. The info guide is fabulous.

Sandra B. on  Oct 15, 2024

Thrilled with my grains.

My water kefir grains are working so well they have grown exponentially. I am thrilled!

Marylyn on  Oct 8, 2024

Absolutely loved it

Yesterday I was able to taste my first batch of kefir water. I absolutely loved it the grains have doubled and ready for a second batch of brewing.

Ezzy on  Sep 13, 2024

Thriving grains

Grains are thriving and producing lots of high-quality kefir. Easy shopping, fast postage. Highly recommend this company to all!

Mary C. on  Jun 10, 2024

Growing like crazy

The water kefir grains are doing beautifully and growing like crazy. Thanks so much!

Natalie on  May 22, 2024

Water Kefir highly recommend

I highly recommend KoruKai. Top service and response!

Anna on  Dec 23, 2023

Super potent grains

Fast shipping, grains are super potent, makes awesome kefir. Easy to follow instructions too, thank you!

Chloe on  Dec 12, 2023

Fabulous kefir

Amazing Kefir. Thanks a million.

Kathie on  Dec 12, 2023

Excellent product.

Come very quickly and I'm very pleased. Thank you.

Nikki Shutkowski on  Dec 5, 2023

Absolutely recommend KoruKai

Purchased my first fresh Water Kefir grains last week. They arrived safely and well wrapped with a little chiller pad to keep them cool during transit. I’ve just harvested my first batch of Walter - my Water Kefir ? and am now second fermenting it with dried cranberries. Needless to say another batch is on the go and I can already see my grains have multiplied. Thanks Cornelia & Kai.

Abi on  Nov 7, 2023

Large and lively grains

The kefir grains are large and lively. The book of recipes is very helpful too - lots of tips I didn’t know. Many thanks indeed!

Sylvia on  Oct 8, 2023

Very helpful guide and healthy grains

Very helpful guide provided. Healthy grains - fermenting a second batch already and I must have doubled these very happy Kefir grains since I first opened them! Lovely water kefir.

Brian Mangin on  Oct 2, 2023

Grains doing well 1 year later

I am proud to advise that the Water Kefir grains you supplied me over 1 year ago are still alive and doing their thing. Thank you.

  • 1 out of 1 people found this review useful.
Marie Cust on  Aug 29, 2023

Excellent product

I bought these grains a few weeks ago. The guide that comes with it is very good with lots of recipes and ideas. I am new to using kefir grains, but with the guide and the very helpful customer service made it a breeze. Thank you so much!

Maree on  Aug 22, 2023

Healthy grains

Thank you so much for my kefir grains!! They are so healthy and have done 2 batches already. I can’t believe how fast they are multiplying. Thanks for all the advice. I have done water kefir before but you have made it really easy!

Marc S. on  Aug 22, 2023

Great customer support

I just wanted to let you know that I have done a few bottles of successful water kefir. I made a nice one with lemon juice and ginger. I did the second ferment in a screw top bottle and nothing seemed to be happening, but then I transferred it to the pop-top bottle, removed the ginger and popped it in the fridge and it went lovely and fizzy and tasted great! Thanks heaps for all your help, that's really good customer service.

livspro on  Jun 16, 2023

Grains are happy and healthy

My water kefir grains arrived happy & healthy, and I received an informational PDF on how to look after them. Thank you!!

Jane on  Jun 11, 2023

Amazing

What a great product! The instructions were very easy to follow and the grains doubled in size after 48 hours.

Rob on  Feb 26, 2023

Amazing guide

The Water Kefir Guide is amazing. If anyone fails to make good Kefir after reading the guide properly, they are not paying attention.<br /> <br /> Previously, when here in NZ, I was just given basic instructions about how to make Kefir.<br /> <br /> No instruction on 2nd fermentation was given, so I’m learning fast & this is going to be good.

Heather on  Feb 21, 2023

These kefir grains are fantastic!

Wow! These kefir grains are fantastic! They really do multiply.In just 5 days they have increased from 3 tablespoons to 8.And the grains are not as small as a previous batch that I bought elsewhere which hardly increased in numbers.The instructions from this seller are superb too.Very helpful and informative.Im very impressed.Thank you Korukai!

Alana on  Feb 5, 2023

Amazing grains!

Very healthy strong grains. Since receiving them 4 days ago, I have a huge amount of new grain formation, and onto my second batch of delicious coconut water kefir. Highly recommend!

Tasha Meldrum on  Sep 4, 2022

Happy Grains

I have recently purchased kefir water grains., and have been having fun experimenting with different flavours. A favourite at the moment is mixing the kefir water with pomegranate juice, quite tasty . Also very happy the Koru Kai has their own blend of complete food for water kefir. A no hassle food that works a treat as my supply of kefir grains has doubled since purchasing. ?

Karen on  Aug 31, 2022

Love love love

Korukai are great to deal with, their prices are reasonable, their products are top notch and their service is great. Originally I bought a small bottle of kefir water from the local Papamoa health shop for nearly $9 and fell in love (but not with the price). Now I am the proud owner of a big jar of rapadura sugar and am making perpetual kefir at home with fearless experimentation. Honestly, since introducing fermented foods into my daily diet, my health and wellbeing have improved dramatically. There is just something really special about kefir water .....my body soaks it up like a sponge. Thankyou korukai for the beautiful healthy grains you've aupplied me.

Miranda Floss on  Aug 30, 2022

Great savings!

The water kefir is so delicious. My kids love it. The flavour combinations are endless and we do not need to buy any fizzy drinks anymore. No more money spend on SodaStream!

Rudy on  Aug 29, 2022

Great grains!

Literally great - these are really big grains and do really well. Well-packaged, a generous amount. These grains are strong and produce reliably. They also grow well and in a short time I had enough to double the amount of kefir I could brew.

Sindy H on  Aug 29, 2022

Great drink

I purchased these grains recently and was very happy with the product & the results. My kids love the drinks we are making.

Ngaire on  Aug 29, 2022

Easy to use

The kefir grains are very easy to handle; much easier than the scobies in some fermented products. It makes a very pleasant drink that is easy to flavour with various fruit and herbs like lemon verbena or lemon balm.

Vaness Mitchell on  Aug 28, 2022

Water Kefir

We love our water Kefir, all our family enjoys to drink it. So easy to make with these detailed instructions and a great fizzy drink that is good for us!!! Love it!!!

Monique on  Aug 28, 2022

Water Kefir

Love making the water kefir! The instructions are clear and easy to follow with a great result.

Liz Brook on  Aug 28, 2022

Excellent Quality

I got my kefir grains a few weeks ago and they were so healthy - huge, crystal grains. I now have a litre and a half jar full of grains! 3 tablespoons in a litre of water triples/quadruples the amount of grains. Today I am giving some to the garden and compost heap. Very happy with my grains the pleasure I get out of experimenting with flavours.

Virginia Gyson on  Aug 27, 2022

Water Kefir grains

What a great product. It was my first time,followed the instructions and ended up with a delish drink..haven't stopped since!

Sarah Wyatt on  Aug 26, 2022

Great investment

As research suggests that body health is linked to gut health I thought I’d have a go at water kefir to keep my gut happy. The grains are incredibly productive, I have a small factory in my kitchen after one week. I use fruit juice or Barkers syrups as suggested by the accompanying booklet and they taste fantastic. I bought the kit as I was a beginner and wanted ease, and feel it was a great investment. I was in Piko buying rapadura and saw that they sell small bottles of water kefir for $5.60, but I’m producing two litres a day and the cultures are growing at an incredible rate. I’m looking forward to trying some new flavours now that I’m more confident and have so much scoby!

Laura S on  Aug 26, 2022

Success for a novice

Thankyou so much for your wonderful water kefir kit and clearly laid out instruction booklet. I have long wanted to attempt making my own probiotic drinks, and your kit and instructions have given me a real boost of confidence as well as health! So grateful. The grains multiply quickly and thrive on the food provided (I purchased a 500g bag of food as well) so that I have ample supply of continuous delicious probiotic drinks. My favourite flavour so far is the Barkers blackcurrant & boysenberry. Thankyou again for helping me get started on this journey.

Jo on  Aug 26, 2022

Fabulous products

I got these water kefir grains and the kefir food last week and am already drinking this delicious drink. It’s super easy to make and the recipes for the different flavours are great. I’d recommend these grains if you’re after water kefir or just a great healthy drink.

Alida on  Aug 26, 2022

Water kefir

Healthy and grow prolifically if fed right.

Janette on  Aug 26, 2022

Water Kefir Grains

A great purchase - kefir grains are very healthy and multiply quickly. I purchased along with the water kefir food and have a continuous supply of this lovely healthy drink.

Theresa on  Aug 26, 2022

Kefir grains

The water kefir grains are doing what they are supposed to but the liquid produced does not taste nice . I must have done something wrong.

Mary-Ann Rowland on  Aug 26, 2022

So good to have them again

The water kefir grains are still going strong and I love being able to have this delicious drink again as part of my daily diet. Being vegan it’s great to get all the acidophilus without having to eat yoghurt (coconut yoghurt gives me a tummy ache). The grains came with good instructions too. Thank you Korukai.

Vanessa on  Jun 23, 2022

Love it

We LOVE our water kefir

Fiona on  Mar 16, 2022

Water kefir grains great quality

Just want to say a big thank you for my lovely healthy kefir grains which arrived today.<br /> They are so large! Much better than some I bought elsewhere.

Vanessa on  Dec 9, 2020

Great product!

Loving the water Kefir making. Very easy. Good fiz. Great instructions!!!

Melissa on  Dec 6, 2020

Super Easy Healthy Sodas in time for Christmas Celebrations

With the warmer weather and Christmas looming I decided to try the Water Kefir grains with the hope of making a healthier soda alternative. <br /> The whole process couldn’t be easier! <br /> I followed the clear concise instructions and within 3 days I had my first lightly carbonated fresh lemonade. <br /> With minimal effort and ingredients, the results are a super tasty and refreshing to drink. The creativity with the flavour selections is limitless but Cornelia does provide recipes and suggestions for your reference. I have successfully made lemonade, ginger and turmeric, fresh strawberry mint plus pineapple and lemon verbena. <br /> Although there is sugar added at the start of the process, the grains/cultures convert this to produce the carbonation. The final degree of sweetness can be tempered by your added flavourings and the length of fermentation.<br /> The grains multiply rapidly so I have more than enough to make continuous batches for all the Christmas celebrations and well beyond. <br /> For a very modest investment the rewards are economical bespoke beverages bursting with health benefits, a bonus that can be enjoyed by the whole family. <br />

You might also like

Water Kefir Kit

$65.00

Everything you need to start making refreshing, probiotic water kefir at home. This complete kit includes dried water kefir grains, a glass fermentation jar, airlock system, strainer, kefir food, and a detailed guide with instructions and recipes.

Water kefir is the vegan cousin of milk kefir and the caffeine-free alternative to kombucha. These live cultures can be used again and again to create refreshing, naturally fizzy probiotic drinks at home.

Easy to make and endlessly versatile, water kefir is a great way to support gut health while creating delicious homemade sodas, fruit ferments, and flavoured drinks.

Water Kefir Complete Food

$6.50

Certified organic water kefir food containing sugar, molasses and micronutrients to feed your water kefir grains optimally. This pack contains the food for water kefir grains only, you need to have your own grains or buy them from us.

This way they stay healthy and produce a better probiotic fizzy drink for you and your family.


Available in 100g, 500g and 1kg bulk pack in a home-compostable, biodegradable pouch.


Containing only certified organic ingredients so that your water kefir grains can thrive (do not come with the grains). Without any roundup or other agricultural chemical residues, which could have a negative effect on the microbes in the water kefir.

16 other products in the same category:

Perpetual Probiotic Yoghurt Culture Shipment...

$19.90
Due to stricter requirements for dairy products we had to stop selling this starter. The hoops we would have to jump through made it nonviable for us to continue.
We have a certified kitchen for our other products, but for dairy we would need a whole different set up.

But here the good news:

We will make a big batch in a certified cheesery once a year so you can stock up when needed. We have it available over the next week. Orders can be made until 3rd May, 8am. We will ship it on the 4th May.

More info and FAQ is below!

Water Kefir Kit

$59.90

We have put together this kit for anyone wanting in making delicious water kefir at home.

The KoruKai Herb Farm "Water Kefir eGuide" will be sent via email once you have placed your order. Please look for an email with the subject line: [KoruKai Herb Farm] Files available for your order. It will guide you along step by step to make your own probiotic, healthy, fizzy water kefir sodas at home.

You can get an additional glass jar here.

Milk Kefir Guide

$9.90

This guide covers all the basics that you need to know to create probiotic, healthy milk kefir using milk kefir grains. We have well over 10 years of experience and know how to get milk kefir grains to thrive so you can also have them for a lifetime.

If purchasing our KoruKai Milk Kefir Grains or our Milk Kefir Kit this eGuide is included with your purchase.


You will get the eGuide as downloadable pdf so make sure you enter the correct email address when placing your order.

Last update: 12th March 2024

DIY Apple Cider Vinegar Kit

$26.90

We have put together this kit for anyone wanting to make their own apple cider vinegar.


Apple cider vinegar is easy and satisfying to make at home and the health benefits are numerous.

A lot of cider vinegar in the supermarkets are pasteurised and filtered. This removed the microbiome of the vinegar and you won't get the maximum health benefits from it.

Fermentation Flask / Yoghurt Maker

$69.90

Expected to arrive mid week (11th March). Orders will be dispatched as soon as we receive them. 

This Fermenting Flask from Culture Cupboard is perfect to keep your kefir at a steady temperature without the nightly lows in winter and the mid day highs in summer.

It is also amazing to make your own yoghurt without the need for an electric yoghurt maker.
The flask comes with a glass jar and a recipe book to make your own dairy and dairy-free yoghurts.

pH Strips Pack of 100

$12.90

pH strips are a quick and easy way to check the acidification of your cheese and ferment.

In a lactic ferment and in cheese making beneficial microbes are underway to turn plant sugars and lactose into lactic acid.

This acidification can be measured and ensures your ferment or your cheese is on the right track.

For most cheeses timing of salting is really important; you want the fermentation to be just at the right acidity before you apply salt to slow it down.

Fermenting Airlock

$6.90

Diameter: 8.4cm

This silicone airlock is perfect for keeping lacto-fermented pickles and drinks under an airlock during fermentation. As pressure builds up gas pushes out the top of the spout without letting air in.

They are suited for mason jars and are secured with a stainless steel ring (ring not included). This airlock fits our 1 litre Glass Jar with stainless steel compound lid.

1 airlock WITHOUT ring is $5.90.

For airlocks with ring please see here.

Fermentation Pounder

$29.50

We have made a great amount of ferments over the years at KoruKai Herb Farm and used a fair bit of pounders. We know what makes a pounder fabulous.
This one is made to our measurements and is well-designed for pounding vegetables and tightly packing them into jars or crocks for best fermentation.

The wood is untreated beech.

Measurements: length 30cm, top diameter 4cm, bottom diameter 6.1cm. Easy and comfortable grip with a tapering of 3.5cm diameter.

Please note: Measurements can vary slightly as each one is handmade and unique.

ONLINE CLASS: Fermentation, Microbiome and Gut...

$0.00
Add to cart

UNAVAILABLE AT THE MOMENT. Sign up below to get an email once it is available again.

We are excited to bring our very popular fermentation workshop to your home!

Classes consist of videos, online lectures, step-by-step instructions, recipes and tips and tricks. We will also answer all your questions and help you along the way. You can join anytime and watch the content at your own pace. You get 6 months to view the contents and ask questions in the forum.

Milk Kefir Kit

$55.90

Billions of probiotics per tablespoon for gut health.

1 portion of active organic milk kefir grains to culture 1 cup of milk in 24 hours, which can increase to 1 litre within 2 weeks.


This kit contains all the basic equipment that you need to make probiotic milk kefir at home. Instructions are sent via email.
An additional glass jar for keeping ready kefir milk in the fridge can be purchased here: 500ml glass jar.

Shipment of fresh milk kefir grains every Monday (or Tuesday if Monday is a public holiday). Orders and payments need to be in by 8pm Sunday to get shipped the following Monday.

Kefir Strainer

$15.90

Stainless Steel Strainer for Milk and Water Kefir Grains

10 cm diameter

Small round stainless steel sieve with a fine wire mesh.
Perfect for use when straining the kefir grains out of the finished kefir. It can also be used for sieving flour or draining food.

Fermenting Airlock with ring

$9.90

This silicone fermentation airlock and stainless steel band is perfect for keeping lacto-fermented pickles and drinks under an airlock during fermentation and storage. As pressure builds up gas pushes out the top of the spout without letting air in.

Diameter of airlock is 8.4cm

One airlock with ring is $8.90

For airlocks without ring please go here.

Fermentation, Microbiome and Gut Health...

$149.00
Add to cart

Fully booked! To go onto the waiting list please sign up below. 

This is an informative workshop for anyone interested in healthy food. No cooking skills are required. You will walk away with some easy recipes that you can implement in your own kitchen using basic equipment.

Date: Saturday, 2nd May 2026
Time: 10am-2:30pm

Location: KoruKai Herb Farm, Pigeon Bay, Banks Peninsula
1 hour from Halswell, Carpooling from Chch is usually possible.


Wholesome lunch included!


Please find Terms & Conditions as well as our cancellation policy here. When signing up for this workshop you automatically agree to the Terms & Conditions. Please make sure to read them.

Yoghurt Making Guide

$14.90

The Ultimate Dairy Yoghurt Guide

Learn how to turn dairy milk into healthy and delicious natural yoghurt without any additives.

With recipes turning yoghurt into a variety of soft cheeses and dips and using it for baking to enhance nutrient availability and flavour.


This eGuide contains 40 pages of detailed instructions and links to demonstration videos on how to make thermophilic and mesophilic yoghurt on a perpetual basis as well as recipes to turn your yoghurt into special dishes - from yoghurt icing for a cake to yoghurt cheese balls and labneh (please find the table of contents below).


This is an ebook and will be available as a pdf to download once your order is placed.

This website uses cookies to ensure you get the best experience on our website