I use a layer of fish compost (fir bark composted with fish offal) which has an NPK of 1-1-1 but is always at 1-1-1 due to aerobic bacteria breaking down the carbon in the mulch. The mulch also contains available iron, calcium and other micro elements. I put down a ground cloth that is permeable first and then add the compost then place the newly collected tree on top of the mulch.
All done – these trees will be left alone all of this year and all of 2014. What happens now is that roots will start to grow into the fish compost mostly fine feeder roots. Depending on where I collected the trees my survival rates is 100% on bedrock collected trees and 75% or more on bog collected trees (bog trees have a limited root system)