Frost

The temps in our area are unpredictable.  All three thermo displays on the way to work said 45 degrees, but at home there was a belt of frost between about 4 feet and 6 feet off the ground.  Really weird, I know, but there was.  No frost on the ground, but there was frost on my patio tomato and fuschia that I had hung back outside yesterday morning.  I turned the sprinkler in the garden on and brought my hanging plants back in the kitchen, we'll see.