Is it possible to build (say a top bar hive) a hive and just allow bees to live in it? Give them a proper site to live and the right berth and just let them go. I don't really want to harvest honey etc. I just want to get more bees in my area (for gardening) and allow them a spot to live.

I have mason bee houses (i think i live in the only spot in NA that has no mason bees (northwest florida))

My bumble bee house lays dormant. Maybe a cedar block for carpenter bees?

--chris