Why shouldn't I move the house?

Once the male mason bees have begun to hatch, they will scent mark the outside of the white tube and the nesting block. It is important that you do not move the house because they will be disoriented and not be able to find their way back to the female mason bees. Each year hosting mason bees is an experiment to find the best location for the house so take note of where you hung the house and make adjustments the following year.