Canning season starts in our area right about the 1st of June. That's when the local strawberries will hit the corner stands that set up for the season. But now is the time to start checking the Goodwill stores or similar second hand stores to replace the canning jars that have been given away or broken. Be sure to look at the edge on top of the jar though and see if there is a nick in the glass. If there is, the jar will not seal and will be useless for canning. I bet you can surmise that I have forgotten a few times to check that lip.