Wikipedia Article About Blueberry jam on Wikipedia Blueberry jam is a jam made out of blueberries, sugar and water, and fruit pectin. Commercial jams often contain chemical preservatives like citric acid. Premium artisanal blueberry jam is produced in Canada and the United States from wild blueberries, which are smaller and more difficult to harvest but more intensely flavoured than cultivated blueberries. Most production is in Maine, northwestern Ontario, and in the Saguenay-Lac-Saint-Jean region of Quebec.