Greetings from southwest montana! I have a dozen fruit trees arriving anyday from a nursery called "st. lawrence nursery" in new york. i am certain they will be very small thin bear root trees that have recently gone dormant. 3 apple 3 plum and 3 pear. I am wondering if i need to do anything to the trunks to get them through our harsh winter? They are rated and bred in zone 3 and will be planting them in our zone 4 area. Just finished digging 9 big holes in frozen ground (rolling eyes) what a joy! But have been waiting a long time for these trees and dont want to lose them the first winter!