The invention relates to a method to allow the separation of a walnut shell (2) from the walnut meat (20), wherein said method comprises the process of supplying gas into the walnut shell (2) through the opening (3) connecting the walnut (1) to the tree branch. The invention further relates to an apparatus comprising a housing (6) in which a walnut (1) is placed and a gas blowing opening (11) which can supply gas into the walnut shell (2) through the opening (3) connecting the walnut (1) to the tree branch.
