You can start a SCOBY from a bottle of raw kombucha bought from the store, but you need to start off small. Grow it in a 32 oz mason jar. 1/2 strong sweet tea/hLf raw booch. Then, after two weeks, when very acidic, transfer to a gallon jar, 3/4 sweet tea and the 32 oz starter. That's how you grow a starter.
Thank you for the advice. But, I have searched both online and in my nearby stores for raw unflavored Kombucha. They don't have any. Hence, I thought of seeking help because I have read that flavored kombucha cannot be used for growing a scoby. Please advise.
I got mine in 2017 from getkombucha.com. By the by, you don't need a scoby just some raw acidic booch. Go on line for brew clubs in your area and go to a meeting,most likely at least one member will be a booch brewer.