I had some MDB's in pots last winter and I had lined the pots up along the north edge where the yard drops steeply into the reserve. I wanted to make sure they got a good cold winter. well, it rained on them and it froze and it rained on them and froze to the top of the pot then it sleeted and freezing rain encased the pot. I wound up with basketball sized balls of ice you could almost see through with a pot of irises inside. I had to use a hammer to break the ice blocks. Most of them bloomed in the spring.
