Do you decide on the basis of frames of capped brood or a particular event? Snelgrove, if I remember, spoke about apple blossom time in England. That seems close for me here too. Usually approaching 6 frames mostly capped brood at that time.I put six on last week. From the looks of things it is time to put on some more this week while the weather is good.
Count me in the group that likes them a lot.
Good collection of links to Snelgrove boards. People who like them, like them a lot!
That will depend on what your motives are. If I primarily wanted another colony and had the new queen created in the upper box I could remove it to its own stand as soon as the queen was mated and laying. That would take it out of the way (being on top of the honey supers of the lower main colony. A person could also let the queen continue and divert bees to the box below as foragers. Functionally a two queen colony. When supers were pulled at end of flow the upper box could be combined and either choose which queen or let (probably) the younger take over.how long are you leaving the snelgrove boards on? I've watched lots of you tube videos and read lots of posts, but all I'm seeing is how to build and how to work the boards, but not a single mention of when to take them off.