Milk Kefir Grains

$19.90
Tax included

Billions of live probiotics in every tablespoon.

One portion of organic milk kefir grains cultures approximately 1 cup of milk every 24 hours and can multiply to culture up to 1 litre within two weeks under good conditions. Available in hydrated or dehydrated form (please select below).

Easy to use and endlessly reusable, milk kefir grains allow you to make fresh, probiotic-rich kefir.

Shipping Information

NZ-wide shipping available to urban and rural addresses, including PO Boxes.

Fresh milk kefir grains are shipped every Monday (or Tuesday if Monday is a public holiday). Orders and payment must be received by 4pm Saturday for dispatch the following Monday.

Please choose: : Dried grains
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We exchange or refund if you are not happy!

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Not for human consumption.

Fresh or Dried Milk Kefir Grains – Which Should I Choose?

Both fresh and dried milk kefir grains will make probiotic kefir, but each option suits different needs.

Dried Milk Kefir Grains are ideal if you’d like flexibility. They are shelf-stable for months without feeding. Once rehydrated, they usually become active within 2–3 days, and kefir can typically be used within that time.
Fresh Milk Kefir Grains are actively growing and already feeding in milk. They should be fed as soon as they arrive for best results. They begin producing kefir within 2–3 days, though it may take up to a week for them to consistently produce a thick, creamy kefir as they adjust to their new environment.


Our Grains Are Truly Active

Our grains are continuously cultured in certified organic milk 24/7. They are never refrigerated or placed into dormancy, which means they are vibrant, active, and multiplying all the time.

What You Will Receive

Via CourierPost:

  • 1 portion of organic milk kefir grains
  • Enough grains to culture 1 cup of milk every 24 hours
  • Grains that can multiply to culture 1–10 litres within a short time under good care
  • Basic instructions to get started

Via Email:

  • Our 17-page Milk Kefir eGuide with detailed instructions and tips. Please look for an email with the subject line: [KoruKai Herb Farm] Files available for your order
  • Email support during your first 2 weeks if you need help getting started

What You’ll Need

  • Wide-mouth glass jar or container
  • Fresh dairy milk (cow, goat, or sheep milk)
  • Strainer (plastic or stainless steel)
  • Thermometer (helpful but optional)
  • Our Milk Kefir Kit contains all of the above essentials, except the milk


Shipping Information

We successfully ship throughout New Zealand—from the far north to the deep south, including rural addresses and PO Boxes.
Fresh kefir grains are dispatched every Monday (or Tuesday if Monday is a public holiday). Orders must be paid by 4pm Saturday to be included in Monday’s shipment.
Collection from the farm on Banks Peninsula is also available (select “Collection” at checkout). 
If your address is rural, please choose rural delivery to avoid delays.

More About Milk Kefir

Milk kefir originates from the Caucasus Mountains, where it gained a reputation as an “elixir of long life” and traditional wellness tonic.
Kefir grains are living cultures made up of beneficial bacteria and yeasts held together in a soft, gelatinous structure. Despite the name, they contain no actual grain. They are called “grains” simply because of their small, clustered appearance.
When added to milk, the cultures feed on lactose, fermenting the milk into tangy, probiotic-rich kefir while growing and multiplying at the same time.

Why People Love Homemade Milk Kefir

  • Rich in beneficial probiotics
  • Cost-effective and reusable
  • Fresh kefir made daily
  • Easy to maintain and endlessly renewable

Customer Reviews

Based on 31 reviews
Write your review !
O. Singh on  May 15, 2026

Amazing kefir grains.

Thank you for your wonderful kefir grains.They are amazing.

trinity on  May 4, 2026

Dried grains

bought dried grains, they took about 4 days to activate, in one week after that i started to produce about 1 1/2 cups of kefir per day for about 2 weeks, then, bam, over a litre of kefir per day since, i don't even bother to put them in room temperature milk, just filter the grains, then put them in a jar, add milk, cover with cheese cloth, pop them in the hot water cupboard for 24 hrs, and boom, fresh kefir, thanks for the excellent product, do you have a grains buy back scheme? ahahahahahah, just kidding, dried grains are the way to go if you don't intend on makeing kefir straight away

Jane on  Feb 14, 2026

Suoper active grains

Just a quick note to thank you for the live kefir grains - they are going gangbusters.

Jacqui on  Sep 23, 2024

Great grains and service

I just wanted to say THANK YOU ever so much for my milk kefir grains. They started producing kefir really quickly and are now making the best kefir I have ever made or tasted.<br /> Thanks for the great grains and service.<br />

  • 1 out of 1 people found this review useful.
David Asher, natural cheesemaker on  Feb 12, 2024

Kefir for cheesemaking

Thank you so much for the grains, Cornelia and Kai! They travelled well - you did such a good job getting them set for transport - and they have already doubled in size with their daily feeding.

Catherine on  Feb 7, 2024

Hugely useful guide

Thank you KoruKai, the guide that came with the grains was hugely useful and my grains have doubled in size and are working brilliantly even in raw milk. I'm so happy with the purchase, thank you.

Mobin K. on  Oct 22, 2022

The best kefir grains ever

Kia ora,<br /> I bought some kefir grains a weeks ago and went to start making my milk kefir. The best kefir grains ever. Now i have started giving away grains as i have so much. Thank you so much. So if someone wants kefir grains, look no further KoruKai is your answer.<br /> Highly recommend.<br /> <br /> Nga mihi nui.

  • 1 out of 1 people found this review useful.
Melissa Thomas on  Sep 24, 2022

Fabulous product!

We have had fabulous results adding the fermented kefir milk to our lamb's milk bottles. The scouring was gone in two days and they are thriving. We also enjoy it in our breakfast and keeps us much healthier.

Adrienne Szasz on  Jul 22, 2022

Amazing

The grains are so strong and growing so fast, I cannot believe. I'm very happy with my kefir grains. Thank you so much for selling them. If for any reason I need to buy again, I will buy it from you.

Jon on  May 20, 2022

Strong and healthy

Milk kefir is going strong. Literally! Your grains are so much stronger and healthier than others I’ve had in the past.

Jo Watts on  Apr 21, 2022

Healthy and robust grains

Thank you so much for the fab healthy and robust grains. <br /> As a Kefir novice, I confess to have followed your advice to the letter, with exactly the results described! Love the helpful pdf. So good. <br /> Many thanks again.

Jan on  Oct 12, 2021

Big and juicy grains

Just a huge thank you for the scrumptious grains that you sent. Had a huge issue with my tummy due to the chemo I am on. Tried various treatment but nothing seemed to hit the spot!! Than I found your site and ordered your Milk Kefir Grains. They have so improved my issues with tremendous results. So thanks for giving me an alternative way of approaching my own health. It has been empowering and so mentally rewarding for my own outlook.

Rob on  Aug 21, 2021

Nice packaging. Prompt delivery.

Just a quick word of thanks for the couple of packs of milk kefir grains.<br /> Nice doing business with you.<br /> Over the past two weeks I have been gradually increasing the amount of milk and now I have a full litre of raw milk and cream sitting on the kitchen bench and it is such a lovely yoghurt.

Lisa on  Mar 3, 2021

Really impressing

Thanks so much I received my grains and fermenting jar in Level 3 Auckland just now. <br /> <br /> I’m really impressed with all the info and instructions and the packaging of the grains thank you.

Olivia T. on  Nov 16, 2020

Excellent.

I ordered my kefir grains from KoruKai Herb Farm and it's all gone perfectly. Thank you!!

Nancy F on  Aug 23, 2020

Great for Lambs too

I have been making Kefir for about six months now and have been very happy with the grains sent (safely) to us. It is easy to make and we use it with our porridge in the morning and making smoothies - yum! It's refreshing on i'ts own too! Interestingly we are currently hand rearing a number of lambs to which we are feeding Kefir. We have had no cases of scours and bloat to date. We would recommend incorporating Kefir into the milk mix for all young animals being hand reared.

Natalia on  Jul 10, 2020

Very happy with the product

Enjoying kefir every day now. Thank you very much for the perfect grains.

Karen on  Jun 17, 2020

Your products are amazing!

I just wanted to send you a huge thank you. Your products are amazing!<br /> I’ve taken on milk kefir before, but gave my grains away when I went on an extended trip away.<br /> It”a been a couple of years now and I decided to give Kefir another go! The grains you sent me are so healthy and vigorous, they make the most amazing kefir!<br /> I also got some yogurt culture from you and that has produced the most amazing yogurt! We can literally stand a spoon upright in the yogurt.<br /> I am so thankful that you’re Sharing these most amazing products with us.<br /> Huge shout out to you!<br />

Mary on  Jun 17, 2020

Great quality grains

Thank you for the easy clear instruction and great quality grains. It's been so easy using the grains and making milk kefir.

Helen on  May 21, 2020

Delicious kefir!

Just wanted to drop you a line to thank you for sending the grains and instructions - my lovely grains survived the journey and the postal service did so well and delivered quickly, and am making lots and lots of delicious kefir!

Sue M on  Apr 2, 2020

Best Grains Yet

These grains are definitely the best ones I've ever come across - subtle flavour, always work and multiply quickly. Directions are great with plenty of tips - thank you!!!

Hayden on  Dec 4, 2019

Great grains and email support

Received the grains within 2 days, followed detailed instructions provided, and started thickening by the second batch and was perfect by 3rd batch. As this was my first time making Kefir, I emailed with some questions, and got detailed and prompt replies. Great customer support which gave me a lot of peace of mind, when I wanted to make sure everything was going alright. I Would highly recommend these grains also knowing you will get support/advice if needed.

R johnston on  Jul 18, 2019

The best kefir grains anyone could ever buy

Received your kefir grains a few weeks ago, they are so healthy and growing beautifully, I am so happy with your product it is a real credit to you and we are so lucky to have someone who is passionate about producing quality.

Nicolene Theunissen on  Jul 1, 2019

Great customer service

I asked a lot of questions over email and had exceptional reaponse and even got a few recipies for free. Thank you giys. Excellent customer service

Nicolene Theunissen on  Jul 1, 2019

Healthy grains

These grains are very healthy. Very good product. Thank you

Nicolene Theunissen on  Jul 1, 2019

Very pleased

This product came in perfect condition and is growing extremely well.

Olga on  Mar 30, 2019

Perfect!

I received kefir grains on Tuesday.<br /> It works perfectly fine, I made it every day without any problems.<br /> You explanations are very detailed and clear.<br /> Thank you very much for your good service.

Deborah Markham on  Nov 15, 2018

Great service!

Just wanted to say thanks so much for the milk grains and the thorough instructions that come with it. I’ve made two batches of kefir now and they’ve turned out great! I read about kefir and it’s benefits in a book called the Good Skin Solution by Shann Nix so I was happy to find somewhere that provided these grains in NZ! <br /> You provide such an amazing quick service too which was great as I was excited to get started.

Larisa on  Aug 2, 2018

Fabulous grains!

I am from Russia and I grew up with kefir. I have bought a few grains from different companies, but these are by far the best grains I have ever had. It makes a very thick kefir and is very tasty. The grains are very vigorous and a tbsp can ferment a whole liter of milk! The price is 1/3 of what others charge. Thanks for bringing back a bit of childhood.

Tracey on  Jul 30, 2018

So easy!

Our home kefir production has gone well right from the first batch. It’s so easy.<br /> Thanks very much.

Susanne on  May 1, 2018

Amazing quality!

We really enjoy the kefir produced with these grains. It is turning out beautifully and the grains are multiplying rapidly. Thank you so much for supplying those at such a cheap rate.

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This beginner-friendly Milk Kefir Making Kit includes organic milk kefir grains, a wide-mouth glass jar, stainless steel strainer, dairy thermometer, and our comprehensive Milk Kefir eGuide with step-by-step instructions.

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