That’s cool. I’m hoping to get fruit off my nigra Tsarigradska mulberry from Bulgaria. Next year. Grows in zone 6. I need to test hardiness as the zone 6 (6b) is comes from is warmer than my zone 6 (6a) I’m protecting it for now till I can get some scion from it to graft to in ground rootstock. I can harvest this winter and the rootsock was planted last spring. So I will be grafting it in the spring.