Hi Everyone! Need some advice on trimming a very frost bitten boxwood beauty. The entire plant did not do well in the frost we had even though it was covered. It has been in the ground for over 5 years (was here when we moved in 3 yrs ago). When we are ok to start triming back the dead stuff in our yards, how much should I trim back?? It was such a beautiful plant and I am hoping to save it. Any input would be much appreciated.