I've had a pair of these beauties for years, filled with standard roses (which I loathe). Last autumn mid-prune, I finally became so incensed with the rampant blackspot I reached down and hacked the stem in half. Then reached over to it's twin and decapitated that one, too. The sense of relief was wonderful; at last the bloody things were gone. I burned the roses, emptied out both pots and gave them a good scrubbing with bleached water, then left them standing empty over the winter. I think this year the prolonged snow and freezing temperatures overwhelmed them, and my beloved "bee hive" pots are ruined. Maybe it was only the contents holding them together.