a killing 'frost' [=weather that is so cold that the frost kills plants]
These plants should bloom until the first 'frost' of the season.
I have to 'frost' the birthday cake.
(..) It's summer and these forests are bustling with life. But the good times will not last. Broad leaves must be shed in winter for their damage by frost. As they disappear, so the land becomes barren with little for animals to eat. The inhabitants must migrate, hibernate, The Amur leopard - (..)2006 TvShow: Planet Earth Title: From Pole to Pole Season: 1 Episode 1