Opinion | We Need Trees, and Trees Need Us

If citizens in construction-besotted Nashville can find the political will to preserve their trees, any city can.

Why the Best Trees Aren’t Always the Biggest

Between a garden’s low ground cover and its tall canopy trees is a layer we often forget about. Here are the special, unsung native trees that can fill it.

Wildfires in California threaten giant sequoias.

Some of the world’s largest trees are at risk after the fires were sparked by lightning last week.

The Nigerian Activist Trying to Sell Plants to the Oil Company That Destroyed Them

“I need to help my women to stand,” says Martha Agbani, who helped a group of women from the Niger Delta build a flourishing mangrove nursery.

For States Dealing With the Spotted Lanternfly, the Policy Is No Mercy

The spotted lanternfly, an invasive species from Asia, is a voracious plant-eater and public nuisance that could cost state economies hundreds of millions of dollars.

Why an East Harlem Street Is 31 Degrees Hotter Than Central Park West

If you want to map inequality in New York, you can just count trees.

Sardinian Village Tries to Save an Ancient Tree Scorched by Fire

A team of experts, with the help of local residents and authorities, is trying to revive an ancient olive tree in the hilltop village of Cuglieri that was engulfed in a catastrophic wildfire.

Questions About Tree Care? You’re Not Alone.

Many people find trees a little enigmatic. But there is help for the asking. (And it’s free.)

How to Create a Secret Garden in Your Own Backyard

The creative consultant Matilda Goad and the garden designer Butter Wakefield, who’ve fashioned a small oasis at Goad’s London home, share their tips.

This Insect Drinks Your Milkshake

The froghopper has amazing powers of suction, scientists found. It also produces astonishing amounts of urine.

What Technology Could Reduce Heat Deaths? Trees.

At a time when climate change is making heat waves more frequent and more severe, trees are stationary superheroes: They can lower urban temperatures 10 lifesaving degrees, scientists say.

California Couple Fined $18,000 for Bulldozing Iconic Joshua Trees

The authorities say they hope the fine will deter people from harming the trees, which are protected under the California Endangered Species Act.

The Unlikely Survival of the 1,081-Year-Old Tree That Gave Palo Alto Its Name

A redwood tree called El Palo Alto has long served as the 120-foot-tall symbol of Palo Alto, but a project to help it thrive has been delayed.

Goodbye to a Yankee Farmer, the Ghost of Exit 8

In 1964, a Vermont farmer burned himself and his farm, rather than surrender his land. His neighbors can’t let him go.