Blackberries I prefer to raw pack. Take whole,stemmed,cleaned blackberries and fill into hot mason jars. Ladle a light sugar syrup (3 cups of water to every cup of sugar) into each jar, leaving a ½-inch headspace. Wipe off the top of each jar, and seal with a lid and ring. Place jars into a boiling water bathcanner and process pints and quarts for 15 min. When processing is over, remove hot jars, place on a padded surface, and wait for them to seal overnight. Clean and store in cool dark place.
** Note from Chella The processing time listed is for altitudes of 1,000 feet or less. For altitudes up to 3,000 feet, add 5 minutes; 6,000 feet, add 10 minutes; 8,000 feet, add 15 minutes; 10,000 feet, add 20 minutes.**