The bitter cold and icy conditions during the winter of 2013/14 revealed "spotty" instances of winterkill this spring. While the exact cause is unclear, relatively warm temperatures in the third week of February (highs ranging from 45 to 50°F) may have allowed crown tissues of annual bluegrass and perennial ryegrass to become hydrated and thus, more susceptible to freezing injury. Unfortunately, temperatures dropped to as low as -1°F the following week, and this may have resulted in freezing of crown tissue and plant death.

Peter Landschoot from Penn State on causes and management of turfgrass winterkill

The bitter cold and icy conditions during the winter of 2013/14 revealed “spotty” instances of winterkill on golf courses, lawns, and sports turf this spring. While the exact cause is unclear, relatively warm temperatures in the third week of February (highs ranging from 45 to 50°F) may have allowed crown tissues of annual bluegrass and perennial ryegrass to become hydrated and thus, more susceptible to freezing injury. Unfortunately, temperatures dropped to as low as -1°F the following week, and this may have resulted in freezing of crown tissue and plant death. A brief description of the causes and management of turfgrass winterkill are provided in the following paragraphs.


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