If the ground does freeze in your part of the world, simply cover your carrot garden with a thick layer of leaves or straw.

VOA: special.2009.02.24

In those days, much of North America was filled with thick, green forests.

VOA: special.2009.01.24

The sides of the box are covered with pieces of thick cloth.

VOA: special.2009.11.30

They are covered with a thick, black substance.

VOA: special.2010.04.07