While on the rim of the Grand Canyon recently, we sampled wild pinyon nuts, which had a bumper crop this year. Since the weather there is similar to our northern Wisconsin zone 4, I started wondering if they would grow in Wisconsin. Then I came across a magazine article that indicated that pinyon pines were a zone 5 plant, but Siberian pine and Korean pine produce pine nuts and would grow in zone 4, although they take about 20 years to produce, and then they don't produce every year. I have recently purchased some acreage, so have space to play around a bit. Has anyone in Wisconsin tried growing either of these edible pines? If so, did they manage to keep the squirrels at bay until they harvested some pine nuts? Thanks for any advice on this new possibility for me. I am also interested in experiences with hazelnuts.