It's a good idea to check large pots (like urns or pots over about 5 gallons size) to see if the drain holes are still open. A friend just lost a treasured rose because the pot the rose was planted failed to drain properly. He didn't know the cause of the slow decline and death of the rose until he finally got around to pulling the dead rose out of the pot and found the pot to have standing water in the bottom.
Jeremy