I used to be on a forum hosted by a magazine that had a variety of forums, one of which was home and garden. It was amazing the number of people who would ask about plants and not state where they lived or at least the plant zone.
My zone 9 garden has plants that are not going to live, let alone thrive in a Zone 4 garden.
I list my home Province, not my town, but if asked I will say where I am from. Duncan, BC on Vancouver Island.