Something I forgot to mention in the following video is that mail order nurseries often sell out of much of their product months before they ship their trees out in the spring. In order to receive the specific product you’re looking for you’ll need to be placing your orders by January and February, otherwise the availability decreases quickly as spring approaches.
I Review the websites of several nurseries I have found online that have the best selection of trees for permaculture projects in cold climate zones. These nurseries have a wide assortment of trees, bushes and shrubs that are adapted to growing zones 2-5. Some of them are focused more on fruit and nut trees while a couple have a greater variety of support and wind break species.
The tree nurseries mentioned in this video: