Many trees and shrubs have exfoliating bark that goes unseen during the growing seasons. During the gray days.

  This is the time of year to which all garden junkies and plantaholics look forward. The mailman’s.

  I spent last week in Columbus. On Sunday, I spoke on xeriscaping at the Perennial Plant Association.

  The tracery of bare branches and the texture of bark become art during the winter. They are.