Plant Hardiness Zone Maps

With autumn passing through our area, signifying winter’s approach, I paused to think about the plant hardiness zone map. In particular, I was remembering how those “hardy in zone 5” crepe myrtles my mother planted last year were not hardy. Wondering where the hardiness zones originated, I did some research, only to find that hardiness zones are not an exact science, are often misunderstood, and have caused caustic debate among gardeners.