Winter rolled in early this year in Florida.  Typically we may have a slight chance of frost in December, but if we are going to encounter sub-freezing weather, it usually comes in January or early February.  This week we are in the midst of a hard freeze.  Last night the temps here dropped down to 25f.  As I am typing this at 2:00am Wednesday morning it is already 26f in my brugmansia growing area.  I'm sure it will drop 3-4 degrees more before sunrise.  To protect my plants from this sub ...