Pinellia cordata's hardiness is difficult to assess. It's gone hrough -10° here in the Chicago area in wood duff from a corkscrew willow facing north but otherwise quite sheltered. I don't see it every year, but , I won't be surprised to see it come up some time in June some time To know that it's growing in gravel in New Jersey is fascinating. Clearly, you're wasting pot space. It's been hardy in upstate New York according to Ellen Hornig. ----- Original Message ----- From: "Judy Glattstein" <jglatt@hughes.net> To: <pbs@lists.ibiblio.org> Sent: Monday, June 01, 2009 8:00 PM Subject: [pbs] Hardiness of Pinellia cordata > How hardy is Pinellia cordata? I have a dozen or more little single-leaf > plants sprouting in the gravel of a narrow bed between front walk and > garage. >