After one hour, prepare/sanitize your canning jars in a pot of boiling water - if you're not using a pressure canner.
Fill sanitized jars with ground cherry jam, and boil them for at least 15 minutes. Jar lids should make a "pop" sound and seal soon after removing from boiling water bath. Cool your ground cherry preserves and store them! *Yield will vary depending on how much water you cook off of your preserves.