Specialty Gardening: Large Container Gardening in City, 1 by DaleTheGardener

DaleTheGardener wrote:
Happ, using a wooden 'box' is a good idea, inexpensive and you can get creative.

You can 'line' the inside with a large black plastic container. We have them around here that are as large as 48" and I have seen even bigger ones. You would have to ask around, people in the plant trade should be able to help you find the size you need. Leaving some air space or lining with foam should help moderate temps of the root ball.

Do you have a digital photo of the site and the bldg architecture?

Podster, yep that's a boxwood.
When I cut off the bottom of a pot I lay it on its side, step gingerly on the root ball, pull the plant out part way and saw thru the plastic with a serrated knife that I buy at the Dollar Store.