I used to live on the border of Wisconsin and Minnesota, it's where i went to college. My guess is that they prolly planted it inn the same woods, wait till it gets bigger u might be able to find it.
Use fabric pots with a CoCo medium and when its hot flood more often for less time, so they have time to breathe.basically using the unit just as a watering device until temps drop, assuming you can't move the rez to a cooler location.
Yeah, im about to post a video on grafting. The last years crown rotted out overt Winter,so im running some other cold Hardy cultivars outdoor this year the grafting i mainly do on indoor mother plants.one root stock 8 flavors