How would you really know? Cold hardy means something very different to those on the west coast. I'm in zone 6 in Pennsylvania but I won't buy a woody plant that isn't good for -20F. What's the good of buying a rhododendron or shade tree that you nurture for ten years and then lose during a cold spell? I bought a canary date palm that was a Russian cultivar and it didn't survive one of our mildest winters because it is cold AND wet here. Tim 6B -----Original Message----- From: pbs [mailto:pbs-bounces@lists.ibiblio.org] On Behalf Of Paul LICHT Sent: Friday, May 01, 2015 5:06 PM To: Pacific Bulb Society Subject: Re: [pbs] Palms with REAL zone protections We propagate and offer a number of cold hardy palms. Paul