Any Christmas tree species, especially non-adapted seed sources or exotic species

Photo by Chal Landgren, OSU.


Photo by Chal Landgren, OSU.

  • Cold temperatures, desiccation, or formation of ice crystals within cells

Signs & Symptoms

Photo by Chal Landgren, OSU.

  • Appears as damage to needles, bark, and bud tissues
  • Reddish-brown needles (when only needles are damaged)
  • Death of buds or shoots (in severe cases)
  • Symptoms may not be evident until warmer conditions later in spring.
  • Injured plants cannot obtain water from frozen soil or move water through frozen tissues.

Where to Look

  • South to southwest side of the tree or on tissue above snow cover

Similar Symptoms As

  • Drought

Management Options

  • Carefully monitor sources adapted to extremely cold areas. They may experience winter injury or frost damage as they begin growth too soon in mild winters.
  • Learn which locations and/or seed sources/species are more prone than others.