When can you start sharing the Scoby? March 17, 2021 15:02 Updated You can cut the scoby when it is about a finger thick. Make sure that it is no longer translucent. Related articles Which cultures are contained in Kombucha? How can you measure alcohol content/sugar content in kombucha? What else can you do with the Scoby? What ingredients are used for the kombucha bottles?