Made a mason bee house with my granddaughter and we put it out around the first of May. It's now June 13 and I noticed about half of the holes are packed with mud. Will the cocoons incubate over the winter? Seems like a long time. We live in New England
Also, you can do a Google search for "mason bee information" and find several sites that also address management.
You can also go on YouTube and search for mason bees and find good videos there as well.
Get me the mayor's office! I need to tell him about this tiny ad: