One of my colonies is booming. Its bursting with bees. Last time I pulled some frames, about ten days ago I didn't see swarm cells, but from what I have read and from videos I have seen this colony needs to be split. I was hoping to leave it as a big, strong hive, but I want to prevent them from swarming. I have been feeding heavily, protein patties since March 1, and sugar water for the past 2 weeks. I am in central NJ, daytime temps 55 to 70, nighttime 45 to 50.
When should I split? Is it too soon to do it on the next warm, sunny day?