Scots Pines can do remarkably well in small pots as the attachment below of a Scots I am working on shows. Excuse the old picture taken after the second styling, I really need to take some new ones. Anyhow, if the roots are good, they don't seem to mind at all, the Scots shown has been in the Horst pot for over two years now.
However, I have found that back budding and rapid foliage replacement.growth is achieved much quicker in a training pot/pond basket. The Scots below had its roots developed into mainly fine feeders in a larger training pot, then moved into a small pot. (Posted at
http://bonsainut.com/forums/showthread.php?t=1495&highlight=scots+pine )
Nice dig Chris, you gotta love Christmas tree farms. It has some work ahead of it, but don't they all?
Will