http://www.permies.com/forums/t/70/plants/potatoes-soil-building JForum - http://www.jforum.net ]]> http://www.permies.com/forums/posts/preList/14211/126818 http://www.permies.com/forums/posts/preList/14211/126818 http://www.permies.com/forums/posts/preList/14211/126826 http://www.permies.com/forums/posts/preList/14211/126826 ]]> http://www.permies.com/forums/posts/preList/14211/126829 http://www.permies.com/forums/posts/preList/14211/126829 http://www.permies.com/forums/posts/preList/14211/126841 http://www.permies.com/forums/posts/preList/14211/126841
All of that is not to mention that sweet potato tubers are a lot more nutritious than potatoes. I would think even in the northwest if you can't actually get a tuber crop it would still make sense as a soil builder, especially since you can buy one or two at the store and produce 100 or so slips yourself.

peace]]> http://www.permies.com/forums/posts/preList/14211/126966 http://www.permies.com/forums/posts/preList/14211/126966 http://www.permies.com/forums/posts/preList/14211/126999 http://www.permies.com/forums/posts/preList/14211/126999 http://www.permies.com/forums/posts/preList/14211/127045 http://www.permies.com/forums/posts/preList/14211/127045 Sand Hill Preservation Center sells Sweet potato slips. They have a lot of heirloom varieties and they sell a "northern assortment" for short season areas. He also gives a lot of quality cultural information.

peace]]> http://www.permies.com/forums/posts/preList/14211/127454 http://www.permies.com/forums/posts/preList/14211/127454