Protecting your garden plants against possible winter injury does take some extra work, but you'll be rewarded with healthier plants next spring. Here are some causes and symptoms of injury and some tips on protecting plants.
Vance, Ben F.
""Winterize" Your Garden Plants,"
Iowa Farm Science: Vol. 17
, Article 4.
Available at: https://lib.dr.iastate.edu/farmscience/vol17/iss5/4