News & Updates

An audience member smiles at the camera in the crowd at the Urban Tree Summit.

September 22 2025

Rooted in Collaboration: The 2025 Urban Tree Summit

Last week, on a misty Wednesday morning in Silver Spring, Maryland, leading voices and community members across the field of […]

RFK stadium is being demolished as a mature tree stands in the foreground

September 22 2025

RFK Site Update: Proving that Our Advocacy Matters

Last week, the DC Council voted to approve the redevelopment of the RFK site, clearing the way for the Washington […]

A large sign labels a forested area in the background as a Conservation Area

September 22 2025

Celebrating National Public Lands Day

This Saturday is National Public Lands Day (NPLD), an annual event established by the National Environmental Education Foundation that brings […]

A group of children and an adult plant a tree on a school campus

September 15 2025

Keeping Environmental Education Alive in DC Schools

Four kids sit at a table looking at the rings of a cut piece of tree trunk.

September 8 2025

Summer Highlights: Nature, Play, and Plenty of Trees!

Heritage trees at the Parkside development

September 8 2025

DC’s Tree Laws Should be Protections, Not Suggestions

Collage image that says

August 25 2025

FREE TREE Giveaway at the DC State Fair!

August 25 2025

Sign The Petition: Don’t Cut Down RFK’s Heritage Trees

August 18 2025

Make a Plan for the People and Places You Love

August 18 2025

Tree of Heaven: The Invasive That’s Probably in Your Backyard

Two incoming Howard University Law students smile for the camera in front of a truck filled with mulch. Other students and Casey Trees employees work in the background.

August 11 2025

Taking Care of DC’s Trees With Howard University Law Students

A tree-lined street near H Street in Washington, DC

August 11 2025

Can Trees and Green Spaces Help Promote Public Safety?

Dog-day cicada on a branch.

August 4 2025

The Cicadas are Coming (but not to DC)!

Shadows casting on a building

July 28 2025

Seeking Shade in American Cities

Four unripe pawpaw fruit hanging from a tree

July 28 2025

Get Ready for Pawpaw Season!

July 21 2025

Mapping DC’s Most and Least Shaded Neighborhoods

Elliot in June watering a young street tree

July 21 2025

One Kid’s Mission to Water All the Trees in His Neighborhood

Looking up at a tree canopy and the summer sun

June 30 2025

The Science of the Seasons: Summer Phenology

Students stand in a circle at the National Arboretum

June 30 2025

Cultivating Tomorrow’s Environmental Champions Through Outdoor Education

June 20 2025

Public Testimony | June 13, 2025 | Committee on Transportation & the Environment

a team of volunteers drops mulch at a volunteer event in Emery Heights Park

June 16 2025

Summer Is Here! Check Out Our Upcoming Events

June 11 2025

Public Testimony | June 2, 2025 | Committee on Transportation & the Environment

June 9 2025

Casey Trees and Bartlett Tree Experts, A Crowning Partnership Made in the Shade (of Urban Trees)

Boulder Bridge at Rock Creek Park

June 2 2025

DC Is Hot and Humid – But Is It Really a Swamp?

Two students dig a hole as they learn how trees are planted

June 2 2025

“Best Day of My Life”: Highlights From School Tree Planting Season

May 19 2025

The Serviceberry: A Guide to Appreciating this Small but Mighty Tree

A team of volunteers pause digging to pose for a photo with their shovels at the Armed Forces Retirement Home

May 19 2025

Looking Back on Our Final Community Tree Planting of the Season