Kombucha is ready to bottle when it reaches your desired level of tartness and sweetness, typically after 7-30 days of fermentation. Taste-testing is the best way to determine readiness.
Determining when your kombucha is ready to bottle involves a combination of observation, taste-testing, and understanding the fermentation process. Here's a step-by-step guide:
Start Tasting After 7 Days: Begin tasting your kombucha after about a week of fermentation. Use a clean straw or spoon to draw a small sample from the top of the brewing vessel, being careful not to disturb the SCOBY (Symbiotic Culture of Bacteria and Yeast).
Assess the Flavor Profile: Kombucha fermentation involves converting sugar into acids, primarily acetic acid (vinegar) and gluconic acid. As it ferments, it becomes less sweet and more tart. Your goal is to find the balance between sweetness and tartness that you prefer.
Consider the Appearance: While not a definitive indicator, observe the kombucha's clarity. It will likely be cloudy, but excessive sediment or unusual colors could indicate issues. A healthy SCOBY will also form on the surface.
Use a Hydrometer (Optional): For more precise control, you can use a hydrometer to measure the specific gravity of your kombucha. This helps track the sugar content and alcohol production, allowing for consistent results batch after batch.
Factor in Temperature: Warmer temperatures accelerate fermentation, while cooler temperatures slow it down. Adjust your tasting schedule accordingly. Kombucha ferments best between 70-75°F (21-24°C).
Bottle When Ready: Once the kombucha reaches your desired flavor profile, it's time to bottle it for a second fermentation (optional) or refrigeration to halt the fermentation process.
Always reserve some starter tea (about 10-20% of the batch volume) from each batch to inoculate your next batch. This ensures a healthy and consistent fermentation process.