Anyone else grow this? I started this from seed last year and it survived this past winter - which was pretty hard here in Montreal (no snow cover and cold temps).
References to it indicate it's only hardy to USDA zone 7 or so. I'm wondering if I have the hardier C. radicans instead, or if the plant is much hardier than commonly believed. I did have it mulched and it was in an area that has allowed me to overwinter plants that are not supposedly hardy to my area, so maybe I am just lucky?