How To Grow Kombucha Mushroom

You can grow a kombucha mushroom, also known as a SCOBY, right at home with just a few simple ingredients and a little patience.

Growing a kombucha mushroom isn’t complicated, and once you understand the process, you’ll be brewing your own kombucha in no time.

The kombucha mushroom is actually a symbiotic culture of bacteria and yeast, and it’s the heart of every batch of kombucha you drink.

In this post, we’ll walk you through exactly how to grow a kombucha mushroom from scratch, how to care for it, and common mistakes to avoid.

Let’s dive right in.
 

Why Growing a Kombucha Mushroom Is Easier Than You Think

Growing a kombucha mushroom is a rewarding process that any home brewer can master.

The kombucha mushroom thrives when you give it the right environment, and it will reward you with endless batches of fizzy, tangy kombucha.

Here’s why growing a kombucha mushroom is so straightforward:
 

1. You Only Need a Few Basic Ingredients

To grow a kombucha mushroom, you’ll need black or green tea, sugar, water, and a starter liquid.

The starter liquid is typically unflavored store-bought kombucha, and it contains the living bacteria and yeast that form your new mushroom.

This starter culture is what kickstarts the growth of your kombucha mushroom.
 

2. The Fermentation Process Does the Heavy Lifting

Once your sweet tea cools down, you mix in the starter liquid and let it sit at room temperature.

Over the next one to two weeks, the bacteria and yeast feed on the sugar and produce a new cellulose layer on top.

That layer is your brand new kombucha mushroom, and it’s completely natural and safe.
 

3. Your Kombucha Mushroom Will Keep Growing

The best part about growing a kombucha mushroom is that it’s a continuous process.

Every time you brew a new batch, a fresh kombucha mushroom forms on top of the liquid.

You can even separate the layers and share them with friends who want to grow their own.
 

How to Grow a Kombucha Mushroom Step by Step

Now that you know why it’s easy, let’s get into the exact steps to grow a kombucha mushroom from scratch.

Follow this guide closely, and you’ll have a healthy, active kombucha mushroom in no time.
 

Step 1: Brew Your Sweet Tea Base

Start by boiling about four cups of water, then remove it from heat.

Add four to six tea bags (black or green tea works best) and steep for about 10 minutes.

Remove the tea bags, then stir in half a cup of plain white sugar until fully dissolved.

This sugar is crucial because it feeds the yeast and bacteria that grow your kombucha mushroom.
 

Step 2: Cool the Tea and Add Starter Liquid

Let the sweet tea cool completely to room temperature, because hot liquid will kill the living cultures.

Once cool, pour the tea into a clean glass jar, then add about one cup of unflavored store-bought kombucha.

This starter liquid is what contains the living cultures needed to grow your kombucha mushroom.
 

Step 3: Cover and Let It Sit

Cover the jar with a clean cloth or paper towel and secure it with a rubber band.

This keeps dust and bugs out while allowing airflow for the fermentation process.

Place the jar in a warm, dark spot, like a kitchen cabinet or a corner away from direct sunlight.

The ideal temperature for growing a kombucha mushroom is between 70°F and 80°F (21°C–27°C).
 

Step 4: Wait for the Kombucha Mushroom to Form

Now comes the waiting game.

After about five to seven days, you’ll notice a thin, cloudy film starting to form on the surface.

Over the next week, that film will thicken into a solid, rubbery disc, which is your kombucha mushroom.

Let it sit for a total of 10 to 14 days to ensure the kombucha mushroom is thick and healthy.
 

Step 5: Use Your New Kombucha Mushroom for Brewing

Once your kombucha mushroom is at least a quarter-inch thick, it’s ready to use.

You can now use it to brew your first full batch of kombucha tea.

Just reserve a cup of the liquid as a starter for your next batch, and your kombucha mushroom will keep growing batch after batch.
 

Common Mistakes to Avoid When Growing a Kombucha Mushroom

Growing a kombucha mushroom is simple, but a few common mistakes can ruin your batch.

Here’s what to watch out for:
 

1. Using Hot Tea

If you add your starter liquid to hot tea, you’ll kill the living cultures.

Always wait until the tea is completely cool before adding the starter.

This is the number one reason people fail to grow a kombucha mushroom.
 

2. Using the Wrong Container

Avoid metal containers and jars with tight lids.

Metal can react with the acid in the kombucha, and a tight lid prevents the airflow the cultures need.

Always use a glass jar with a breathable cloth cover.
 

3. Storing in a Cold or Drafty Spot

Your kombucha mushroom needs consistent warmth to grow.

If the room is too cold, the fermentation slows down and mold can form.

Keep your jar in a warm place, away from drafts and temperature swings.
 

4. Skipping the Starter Liquid

You can’t grow a kombucha mushroom from just tea and sugar alone.

The starter liquid provides the initial living bacteria and yeast that form the mushroom.

Without it, your sweet tea will just sit there and eventually mold.
 

So, How Do You Grow a Kombucha Mushroom?

Growing a kombucha mushroom is a simple process of fermentation that requires sweet tea, starter liquid, and a little time.

You can grow a kombucha mushroom at home by mixing cooled sweet tea with unflavored kombucha, covering it loosely, and letting it sit in a warm spot for up to two weeks.

The kombucha mushroom will form on the surface as the bacteria and yeast feed on the sugar.

Once it’s thick and healthy, you can use it to brew endless batches of delicious kombucha.

So go ahead, give it a try, and soon you’ll have your very own kombucha mushroom thriving on your kitchen counter.