|I have an Acer palmatum dissectum|
|This tree can grow up to six feet tall and up to nine feet across.
When you dig it, water it thoroughly the day before, dig carefully and replant immediately, do not allow the roots to dry out while in transit, and after planting mulch and water carefully for the next two years just as you would any newly planted tree. A good time to transplant would be September.
Keep in mind this is a relatively shallow rooted tree but the roots spread wider than the branch tips, so you will need to take a very wide rootball when you dig it. Take as much of the root system as you possibly can. Plan on a very heavy rootball and prepare to move it by placing it on a tarp or plywood to facilitate dragging it to the new location. Or, you could root prune the year before to prepare it for the move.
Here is more information you may find helpful. You may need to cut and paste the complete url into your browser ot make it work correctly.
Good luck with the move!