clematis from pot to ground
I would like to transfer a clematis from a pot into the ground. It's a viticella type and has been in the pot for well over ten years, but still grows well enough. The pot is about 13inches diameter, slightly less in depth, but I very much suspect it will be considerably pot bound and therefore a sod to get out, so quite a bit of damage to the roots and brittle stems would be inevitable (don't fancy breaking a nice pot). So how much damage to the roots can a clematis take and still survive.