After filling up the mason jars, do you need to refrigerate immediately? I want to brew in the next few days and would like to avoid needing a starter.
Refrigerate until brew day. Take them out when you start brewing and allow them to come up to pitching temps. (Though many pitch cold without issue too)
By chilling you will get more of the yeast to drop out of suspension so you could pitch more yeast and less of the remaining liquid.
North Liberty, Iowa
"Beer will change the world. I don't know how, but it will."