News & Updates

An up close photo of orange leaves in the fall

October 6 2025

The Science of the Seasons: Fall Phenology

As fall settles in around us, shorter days and cooler nights inspire us to pick our pumpkins and make our […]

A row of trees from the Casey Tree Farm, dug up and ready for transport.

September 29 2025

Summer Highlights from the Casey Tree Farm

As September comes to an end, we’re taking a moment to reflect on a productive summer at the Casey Tree […]

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

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

September 22 2025

Celebrating National Public Lands Day

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