I’m not buying that we’re really Zone 6. I think there’s an agenda behind those changes. Night before last we were within 1° of a bad frost. Three years ago I think it was we had a hard freeze on April 20.
I’m keeping my orchard trees pruned down to 15’ or less so I can cover them if necessary. I didn’t do that the other night and got lucky.
I too am sceptical about the zone 6. We ordered dwarf trees so they wouldn’t grow too tall in case of spring freeze too.