May 20

While some sources say the end of the mason bee life cycle is May 30, it looks like I am
not getting any visitors.
I think the life cycle is over.
I will remove the tubes in October and put them away.
Also, I will make paper tubes of the correct size to replace them.

I am going to keep an eye on the tubes but it does not appear any
new tubes are being filled and no bees seem to be visiting.