Annual cold snaps have kept some invasive tree pests in check, but outbreaks could become more common with warming ...

Dave Powell/USDA Forest Service (retired) / Bugwood.org. All spruce trees have sharp-pointed needles that are often 4-sided or diamond-shaped in cross-section and have four whitish striped lines.

Example of conifer trees include pine, fir, spruce and cedar. Some shrubs which are conifers include juniper, arborvitae and others. Garden: Flowering plants that thrive in full sun and high heat.

Parts of the North Cascades and Mount Baker are facing an outbreak of the western spruce budworm, aerial surveys reveal. The ...

Now, researchers at the University of Texas at Arlington are using artificial intelligence to take the guesswork out of pollen tracking, starting with tree pollen.

Example of conifer trees include pine, fir, spruce and cedar. Some shrubs which are conifers include juniper, arborvitae and ...

It stripped the needles from fir and spruce trees across most of northern Maine, killing 7 million acres of trees and costing the state’s forest economy hundreds of millions of dollars.

Loveland’s tree streets include 22 streets named for trees in the Pine Family. The family includes 234 species worldwide and they separate into nine groups: cedars, Douglas-firs, firs, golden ...

89% of the state of Maine is covered in forests and half of those trees are spruce and fir trees. The state legislature is ...

The Douglas fir, also called a Douglas tree, Oregon pine or Douglas spruce, can grow hundreds of feet high — and the oldest of the species can live for over 1,000 years. The Douglas fir is the ...

The state’s Maine Spruce Budworm Task Force has outlined steps forest owners can take in at-risk areas to minimize damage, including insecticide spraying and removal of balsam fir trees, the ...

Reviewing the wild world of evergreens can help gardeners and homeowners care for and maintain their landscapes.