I go by a zone lower than the new guide. Most of the time the temps do fall in the upper zone, but then that low temp for a few days/weeks every couple of years, that is enough to kill off those plants. Year before last we had a very cold winter here, which is really typical. So whoever's idea it was to change up the zones, dumb IMO
Lowes' tags, good to look up the plant first, because most things almost always get bigger than the tag says.
