What: Tsuga canadensis “Cole’s Prostrate” is a dwarf prostrate conifer that ... but well-drained soil. Size: This Canadian hemlock grows to be 2 feet tall and spreading to 7-feet wide ...

Rob Shenk, the Senior Vice President of Visitor Engagement at Mount Vernon, tweeted that while D.C. lost a lot of trees in the brutal Nor'easter winds, the loss of the 1791 Canadian Hemlock was ...