well from things i have read it seems to be one of the most cold hardy possibly the most cold hardy. but i cannot say for myself. in zone 6 illinois we usualy get hot summers that seem to last for 5-6 months. with some figs i have i dont even get to the main crop so i am forced to look for shorter season cold blodded kinds of figs. i have a lot of roted cuttings going for my collection with some knowns such as mvsb, rdb, vdb and many more along with some unknowns. i cant wait to see how they do here. really looking forward to Vdb as it sounds wonderful.