Horticulture -

“the art and science of growing flowers, fruits, vegetables, trees and shrubs resulting in the development of the minds and emotions of individuals, the enrichment and health of communities, and the integration of the ‘garden’ in the breadth of modern civilization.” (Diane Relf, Prof of Horticulture at Virginia Polytechnic University)

Winter Injury

In a year when we have had record cold temperatures (-30˚F wind chills) some species and cultivars of woody plants will be injured due to temperatures falling below their tolerance level. Southern species planted in northern regions may have survived several mild winters only to be severely damaged in an extreme cold snap this year. Plants native to more northern climates tolerate lower temperatures and are generally not injured under these conditions.
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Resources

Green Tech - January Report on Global Warming

Red Barberry

White Pine

Link