🍋 Ginger & Lemon Kombucha (Second Ferment)

Published · Updated

Once your plain kombucha (F1) is ready, it’s time for the fun part: flavoring and carbonating! This “Second Ferment” (F2) traps the gas inside the bottle to create bubbles. Ginger and Lemon is the classic flavor combination—refreshing, spicy, and great for digestion.

  • Time: 2-5 Days
  • Yield: 1 Litre
  • Difficulty: Easy

🥣 Ingredients

  • 1 Litre

    Kombucha (F1 Finished)
  • 1 Tbsp

    Fresh Ginger (Chopped)
  • 2 Tbsp

    Lemon Juice
  • 1 tsp

    Sugar (Optional for fizz)

⚙️ Instructions

1

Prep Bottles

Use strong, pressure-rated swing-top bottles. Add the chopped ginger, lemon juice, and sugar (if using) directly into the bottle.

2

Fill

Pour your finished plain kombucha into the bottle. Leave about 3-5cm (1-2 inches) of air space at the top.

3

Ferment

Seal tightly. Store at room temperature for 2 to 5 days. Warmer rooms will carbonate faster.

4

Chill

Refrigerate for at least 6 hours before opening. Cold liquid holds gas better, preventing geysers!

❓ Frequently Asked Questions

Why add sugar if kombucha is already sweet?

The yeast has already eaten most of the sugar in F1. Adding a tiny bit more sugar in the bottle gives the yeast fuel to create carbon dioxide (fizz) without making the drink too sweet.

Can bottles explode?

Yes, if pressure builds too high. Always use bottles meant for carbonation (like flip-top beer bottles) and avoid square bottles, which are weak. Burp them if unsure.

What is “burping”?

Burping is briefly opening the bottle to release excess gas. Do this once a day if you are worried about pressure, but doing it too often will result in flat kombucha.

What is the glob floating in the bottle?

That is a baby SCOBY (or pellicle). It forms because the bacteria are still active. It is perfectly safe to drink, or you can strain it out.

Can I use powdered ginger?

You can, but it leaves a gritty texture. Fresh ginger root or pure ginger juice provides a much cleaner, brighter flavor.

Why isn’t my kombucha fizzy?

It might be too cold, the seal on the bottle might be bad, or there wasn’t enough sugar for the yeast. Try moving it to a warmer spot or adding a raisin.

Do I strain the ginger out?

It is best to strain the kombucha into your glass when serving. Leaving the ginger in the bottle during storage keeps the flavor infusing.

Can I use other fruits?

Absolutely. Berries, mango, pineapple, and turmeric all pair beautifully with ginger. Experiment with whatever is in season.

How long does F2 last in the fridge?

Unopened, it can last for months. However, the flavor is best within the first month. Once opened, drink within a few days so it stays fizzy.

Can I use plastic bottles?

For beginners, reusing a plastic soda bottle is safe because you can squeeze it to feel how much pressure has built up. Once hard, it’s ready.