Re: Enviroment and swarming
I don't move hives around the country, so I have not experienced the scenario you pose. However, consider that swarming may not be tied to the calendar specifically, but perhaps more to conditions that sometimes coincide with the calendar. In particular, consider this chart posted by MattDavey in another thread:
(Click the blue arrow in the quote box to see the original thread.)
Originally Posted by MattDavey
So in view of Matt's chart, swarming can occur when the right conditions occur, and that can be over a period of many months, particularly if the hives have a longer flow than usual (by moving them around).