By Dan Buckler, DNR urban forest assessment specialist, Madison, daniel.buckler@wisconsin.gov, 608-445-4578
Jack Frost descends upon us all in Wisconsin, but the depths to which he brings the mercury differ depending on your latitude, elevation, and proximity to water or urban areas. These differences are observed in a location’s cold hardiness zone, which represents the average minimum temperature a location is expected to experience.
Cold hardiness zones are well-known decision-making factors for anybody with a smidge of green on their thumb. But did you know that there are multiple hardiness zone maps out there, and that where you stand right now might be in zone 6 on one map, but zone 5 on another? Enter the labyrinth, dear reader.