The increase in tree "fluff" is likely a stress response from poplars, aspen and willows reacting to the dry conditions from ...

Sean O'Brien, from the UNH Cooperative Extension, takes a look at how beech leaf disease spreads and the signs to help you ...

Looking for relief from the sun? These seven fast-growing shade trees are perfect for creating a cooler, more comfortable backyard in a short time.

Have you noticed discoloration on your maple tree leaves this year? You aren't the only one. Here's what you should know ...

An aggressive hatch of Douglas-fir tussock moth caterpillars is threatening trees, both in national forests and in Santa Fe.

Unfortunately, there is a substantial threat to this tree that spans across the eastern United States — beech leaf disease ...

Some national parks, like Sequoia and Redwood, are known for their ancient trees. But the world's oldest tree was from neither of those parks.

Aspen trees are vulnerable to infection from a number of sources. Common problems include fungal diseases like Cytospora, leaf spots, and other cankers that can cause trunk rot.

Aspen groves are unique ecosystems that develop and survive off an underground root system that spreads out, sending new "suckers" that become aspen trees. Their roots connect many individual ...

Wildlife is eating Earth’s largest and oldest organism, the Pando aspen tree in Fishlack National Forest in Utah. Credits: Public Domain, via Wikimedia Commons. Wildlife is eating alive Earth’s ...

Discover the major common tree diseases in the United States. Armillaria attacks both hardwoods and softwoods and causes either yellowing leaves or browning needles. Wood that is decaying from ...

A recent DNA analysis of hundreds of tree samples suggested Pando is between 16,000 and 80,000 years old, making it one of the oldest living organisms in the world — although that research ...