Carpathian walnut (English walnut), Juglans regia

This is the walnut that we falsely call Grenoble walnut. Originally, the origin of the seeds is from the Carpathian Mountains in Poland but more recently from Ontario. It is considered not very hardy in Quebec, but it is still worth trying one or more in a suitable location. There is reason to try it in southern Quebec in a protected situation because we observe a trend towards warmer and longer autumns, which favors the ripening of the nuts. On the other hand, it can be subject to winter warm spells with a dormancy that is not deep like black walnut for example. It may come out of dormancy somewhat and take slight damage. We also recommend painting its trunk with white paint, which can greatly prevent cracks caused by winter freezes and thaws. It is sometimes prone to frostbite when exposed to freezing wind and extreme cold. In addition, in certain cases, it can experience a drop in the crown during a particularly cold and windy winter; commonly called in English (Dieback). We do not recommend it when planting several subjects (nut tree orchard), even if you are on the island of Montreal or in Laval because the risks of partial losses or low production are present. We recommend 2-3 specimens (best pollination) on your large plot of land or your garden in a protected environment in zone 5a minimum. We are convinced that you will have a production of nuts. For more information on its cultivation in our latitudes, consult its technical sheet.

The Casse-Noisette nursery planted a few individuals in 2015 to test hardiness in zone 4b and selected the best subjects which will then be grafted by the hundreds. We are hopeful that we will find suitable topics.