How cold is it outside? Let’s check the Rhododendron to find out…. Not too bad — definitely above freezing: Now it’s around freezing: Oh, it’s colder now, around 25 degrees: Yikes! It’s really cold now, 20 degrees or colder: The Rhododendron is surprisingly accurate as a cold weather thermometer. Its leaf-rolling trick protects the leaves … Continue reading How Cold Is It Outside?