I put them in a brown paper bag. They can be loose tomatoes or still on the vine tomatoes. Then just set the bag out of your way. They can all go together in the same bag. Mine didn't ripen all at same time, it just depends on where they were in their growing period. The dark green ones generally won't redden but give them (dk green) a few days in the bag to see if there is any change. The light green ones will take from 1 to 7 days to redden.