Has anyone transplanted a Mugo Pine with success? This Pine is approximately 3 ft tall by 3 ft wide and has outgrown his space.
Mugo is probably the easiest pine to transplant - next to jack pine. It doesn't grow a tap root and should have fibrous rootage near the trunk. How you treat it kind of depends on how long it's been sited where it is. If it's more than 3 or 4 years, you might want to do it in two stages by root-pruning this fall & lifting it next spring. If you want directions on how to do that, I can help - let me know.
If you're to lift it (you didn't say where you live) this year, do it as most of the trees and shrubs in your area have already started to leaf out. Use a sharp spade to sever roots and get as large a root-ball as you can manage. Try to keep soil around roots as stable as you can. Move it onto a tarp & drag it to your already prepared hole where you will plant it slightly higher than previously (never shallower & allow for some settling of soil). Backfill with the same soil you removed from the hole & water in well. This plant grows best in a well drained and spare soil.