Re: Hollow tree/ no bees
Our back forty (we call it) is loaded with box elder. I think the bees are smart. They know that these trees make horrible homes for them because of there weak structure. They are susceptible to wind, rain, ice and snow damage. Although they can completely up-route and fall over without dieing they damage easily especially when they have a rotten hollow center. I think they are a good pollen and nectar source.
Zone 5a, Practicing non-intervention beekeeping