FOUR: Wait for the SCOBY to Grow
Now, you have to wait for the SCOBY to grow. You want to keep your fermenting jar somewhere out of direct sunlight but also somewhere warm. Approximately 65 to 85 degrees is the optical temperature for growing a SCOBY. This process will take anywhere from two to four weeks. It usually takes less time in the summer.
After you have let your jar ferment for seven days, you will be able to see a small SCOBY starting to develop. Sometimes it takes a little longer so don’t be discouraged if you don’t see it after a week. However, after three weeks, if you still don’t have any action, you should throw out the tea and start over.