MINNEAPOLIS — The record warmth this winter could continue to cause problems through the spring and summer for oak trees. Oak wilt, which has been in Minnesota for 70 years now, continues to spread.

The ridges on twigs and the main trunk become more pronounced as the tree ages. Bur oak is well adapted to Northern landscapes, especially areas in North Dakota and western Minnesota, where ...

As spring slowly arrives in the North, an arborist’s fancy turns to thoughts of trees. It’s true for Jake MacDougall, who ...