Do I need to have a support wire on my tree when it is planted?

Probably not, but if it is absolutely needed, be sure to insure that it is removed after one year.  We see countless trees die every year because these wires are installed at planting and forgotten.  They then manage to “strangle” the plant in a very short time cutting off the trees’ vascular system which is located just beneath the bark.  If a tree cannot stand on its own after one year there are other problems that should be addressed. (ref: Cabling and Bracing Abstract)