Prepare elderberries by removing large stems. Place in large kettle; crush. Cover and simmer about 15 minutes. Strain juice through hjelly bag. Measure juice. If you do not have quite enough, add apple juice to make 3 1/2c. Add lemon juice and pour into kettle.
Heat, adding sugar, and bring to a boil, stirring constantly.
Add pectin. Bring to a full rolling boil and boil hard 1 minutes.
Remove from heat, skim off foam and ladle or pour into hot jars; seal.
Makes 3-4 half pints.