Nancy Reading wrote:The link to the 'nursery' (presumably the originator) seems to be in Southern Manitoba, so Canada I believe.
Yes, quite likely from the Morden Research Centre which is SW from Winnipeg. This is an Agrifood Canada (Federal research entity) station and coupled with trials in Saskatoon and Lethbridge give good data for hardiness from the Canadian Rockies back through Ontario. Several tree varieties out of southern Manitoba are sold at nurseries in North Dakota and northern Minnesota in the US as these come with strong genetics for productivity in our soil types and tolerance to cold winters.