Combine pectin and juice in a dutch oven or large wide pan. Bring to a boil, stirring constantly. Stir in sugar and return to a boil over high heat. Boil exactly 1 full minute, stirring constantly. Remove from heat and skim foam with a metal spoon.
Pour hot jelly into hot sterilized jars, leaving 1/4 inch headspace. Wipe rims and adjust two piece lids. Process in boiling water-bath for 5 minutes.