I’ll second that. Pine would be way too soft and you want something pretty hard. It’s important in most planes that the mouth be only big enough to leave room for shavings and with a jointer you probably only want very thin shavings. The sole in front of the mouth should be flat and hard so that it holds down the wood you are planing before the iron cuts it.
Matt, Northern California - Started a blog in 2016: http://tinyshopww.blogspot.com/