Champaign, Ill. (WCIA)

Extreme winter cold is something that can keep gardeners up at night.  Since plants are dormant, there is little we can do in the way of plant health care and that can be a real helpless feeling.  The extremely cold weather back in December certainly raised concern and my office received a number of calls from worried gardeners. 

The University of Illinois Extension breaks down what you can do on their blog.