I screwed my insect hotel onto the shaded north wall just to keep it out of the way: when I opened the tubes the next spring, I saw what had formed inside
You installed an insect hotel on a shaded north wall only to find mold, damp tubes, and dead larvae instead of thriving mason bees. The problem isn’t bad luck—it’s physics. Learn why wall orientation makes or breaks a bee hotel and how to fix it in five minutes.