If you thought the ancient evergreens at California's Big Basin Redwoods State Park were old, the state's bristlecone pines ...

A swarm of destructive wasp-like insects is spreading fast, and it could mean bad news for pine trees, holiday traditions, and your backyard.

In a Swiss pine forest, the treetops are being sprayed with mist in a bid to discover the effect that drier or wetter air has ...

Pine sawflies are invasive bugs that resemble wasps and are taking over pine trees in Washington's Pierce County.

Mistletoe has a long-standing tradition during the holiday season. We hear about it in songs and see it at parties. Some may run under the mistletoe for a kiss, while others run from it.

Apart from maintaining desirable soil pH levels, pine straw keeps the moisture in the soil from evaporating and helps the ground retain a consistent temperature. These effects protect azaleas' shallow ...

While large tracts have been cleared or died off, in other areas trees are expanding into sage flats and climbing upslope. “What’s contributing to the decline of Pinyon Jays is something about the ...

Interestingly enough, the Norfolk Island pine tree is not a pine tree! It is an evergreen conifer that grows in subtropical environments. Norfolk Island pine trees are treated as living Christmas ...

I have mistletoe in a tree in my garden. I was told to keep it as it’s so unusual, but I’m afraid it might kill the host tree. Can you advise me? S Doyle, Co Dublin Relatively rare in Ireland ...

Townsend's Inlet - Does anyone know why many of the “ black” pine trees on the dunes in TI are dieing? Many have turned brown while others are bare of any needles. They ruin the appearance of the ...

A tiny bristlecone pine tree, one of the oldest-known living things on earth, was stolen from the grounds of the Hayes Presidential Library & Museums in Fremont, Ohio, and anyone with informat… ...