Northern Select HazelnutThe Northern Select Hazelnut is deliciously nutty and rich in flavour that averages 1. 5 to 2 cm (3 4") in size. It is a hybrid between the American Hazelnut (Corylus americana) and the European Hazelnut (Corylus avellana). Northern Select Hazelnuts ripen from late August to early September. Developed by Les Kerr and grown in Saskatchewan, these seedlings are disease resistant and boast high productivity. Each individual seedling can exhibit its own