Horribly pot-bound rose transplant
Does anyone have experience root pruning rose bushes? I have just managed to get this bush out of its growers pot and shoot a little of the soil out with a jet of water. It is horribly pot bound. (I bought it last year and never got around to repotting.) I can't even loose the roots with my hands. How much should I chop away? The bush has been very vigorous.
I am repotting it into the gritty mix in a 20 inch italian terra-cotta pot.