I can recall more than a few occasions in the past when I have found myself second guessing which of the four seasons we are in based solely on the unseasonable nature of Oklahoma’s weather at any given moment.  However, the onset of bone chilling temperatures along with the recent record breaking snow event leaves little doubt that we are indeed in the grips of winter.  One of the landscaping chores that is best to do in the mid to late winter months is pruning of trees and certain other woody ornamentals.  The biology and physiology of deciduous trees make this time of year ideal for pruning.  Pruning objectives will vary depending upon a tree’s age, location in the landscape, species, expected future growth, and overall current health of the tree.  With the absence of leaves it becomes easier to examine the overall structure of a tree and this is helpful no matter what objective you’re trying to satisfy.  With young trees the main pruning objective should be to train and direct future growth.  Another objective may be to remove any crossing limbs.  The long term health and development of a young tree is greatly enhanced with proper pruning to meet these objectives.  A major consideration in pruning a mature tree may involve removing storm damaged or diseased branches.  Due to their weakened nature, such branches become serious hazards in future wind or ice storms.  The timing of pruning practices of deciduous shrubs is dependent upon their flowering characteristics.  Those shrubs that bloom on new wood or current season’s growth (summer flowering) can be pruned during the winter months while shrubs that bloom on old wood (spring flowering) should not be pruned until after the bloom period has ended.  It is generally advisable to utilize a certified arborist to ensure pruning work is performed properly and safely.  While I've just touched on a few basic pruning considerations I am always happy to answer specific questions on the  topic directed to me by phone or e-mail.