I have a tall (7'+) standard rose which was planted in a 16" earthenware pot until it blew over and fragmented yesterday!. Have just bought a 20" x 12" banded timber barrel as replacement. I wonder whether it might be efficacious to line the barrel with plastic sheet, suitably punctured to allow water egress? And should I 'spread' the rose root-ball? As a novice I'll be most grateful for any tips. Thank you.