Greg Palmieri
Five-year-old western larch with yellowing leaves surrounded by two spruce species at the trial plot near 37 Mile Haines Highway in October, 2017.

In 2012, Canada’s British Columbia Ministry of Forests planted 15 foreign non-native seed species in the Chilkat Valley as part of a larger project aimed at getting ahead of climate change by planting seeds from slightly warmer environments.

“Knowing that climate change is moving across the landscape about 10 to…