I can't read the map but putting in my zip says heat hardiness 8 9. We've always been 9b before so that is a cooler zone to me. George Margaret Lauterbach wrote: > AHS says it's based on temps between July, 1986 and March 2002. That > should have picked up our -25 in 1990. Margaret L > >> Egad! They've moved me to zone 6! They used to have me in zone 5 and >> I've >> always had to move down to zone 4 when buying plants to get them to >> survive. >> Granted, we haven't had a zone 4 winter for several years and this past >> winter our low was the lowest it has been since this drought started, >> only >> down to -11. I wonder if they have based this map only on the past 4 >> or 5 >> year's weather? >> >> Terry > > > > > > > >