Hi, Thanks for your interest. Many cultivars are from Germany or Russia. Here, in Blue Ridge Virginia, last frost mid May, first frost mid Oct. Occ highs of 33-35C, very humid, lots of rain. winter never cold for long. Grows very well in dry air, moderate climate of pacific North West. A Freind had a hard time establishing here. can get quality bare
root plants but hate to loose after much care & $$