Taakeulv19
Elms really like to go dormant during the winter. I would think that you would be ok with moving your elms in mid summer; this will give them plenty of time to acclimate to the seasons there in the far north. You probably will have to winterize them when the temp goes to sub-freezing.
http://www.bonsai-bci.com/species/elm.html
Check with a local club after (and maybe before) you get there.
http://www.absbonsai.org/USAClubs.html
Ugh, going from 1 extreme to another. Just be glad you’re not doing in mid winter!
When I move to South Texas from
Silly-con valley in '94, I
snuck out several trees and brought them here in the middle of July, needless to say I lost a few the 1st few weeks, they got BAKED! But I went from cool weather to very, very HOT. This is just to opposite from what you are doing.
Good luck with your move, redhawk