Q: Our 12-year-old weeping birch tree appears to have died because all the leaves have turned brown. Do you think it is a goner or should we wait to see if it revives next year? What do you think ...

Curly—or Karelian—birch is a mysterious tree with a patterned wood texture and a bizarre trunk shape. Unlike the elegant white-stemmed traditional birch, the Karelian one may seem unsightly at first ...