Here in middle Tennessee, 5 of 5 are still alive so far. All are nucs made up in late July. This is my third winter, and I have never used any type of treatment. I have only bought 1 hive and 4 queens. The queens were survivor types from Purvis. Unfortunately, only 2 of those took, and 1 of those turned drone layer.I'm set to get 2 nucs in March, and these are supposed to be survivor bees. Looking forward to a great new season.