7 Steps to Canning Grape Jelly

Step 1, Check Jars

Check the jars to make sure that none have nicks on the rims, cracks or sharp edges. We have used mayonnaise jars but they have had too many failures. They have thinner rims and are not as strong to handle the heat. The failure rate did not warrant using them. Often you can buy Ball or Kerr canning jars at Goodwill or from ads in the newspaper at good prices.