Health and Safety recommendations for canning and preserving produce change from time to time so it is recommended to check on the current guidelines. For additional guidance on Canning and Preserving The USDA Complete Guide to Home Canning and Preserving 2015 revision* can be downloaded from the page here : http://nchfp.uga.edu/publications/publications_usda.html 



* Believed to be the current version at time of writing (January 2020)