News & Updates

A collage of trees with the

February 2 2026

Phenology February is Here!

The trees may be dormant, but our passion for arboreal competition is wide awake. Welcome back to Casey Trees’ third […]

Potomac Phil, a taxidermied groundhog, stands in front of snowy trees in Washington, DC.

February 2 2026

Can Trees Predict the Weather?

Photo credit: Angela N. via Flickr February 2 is Groundhog Day, when millions of people across the country look to […]

Looking up at the branches of sycamore trees in winter.

January 26 2026

The Science of the Seasons: How Trees Weather the Winter

Trees began preparing for winter as soon as the warm days of late summer became consistently cooler and shorter, turning […]

Attendees for the Mid-Atlantic Nursery Trade Show (MANTS) walk through an entrance.

January 12 2026

Showcasing Our Farm at MANTS

January 5 2026

Your 2026 Checklist for a Greener Year

December 29 2025

7,000 Trees and Counting: Our 2025 Impact by the Numbers

December 21 2025

Bringing Winter Tree ID to Action

December 18 2025

Update: Tree Preservation Enhancement Amendment Act of 2025

A closeup of an American holly tree.

December 17 2025

Evergreen Trees

A volunteer measures the circumference of a tree.

December 15 2025

Updates From the Field: More From Our GCA Fellows

Close-up photo of beech leaves.

December 15 2025

Beech Leaf Disease: An Emerging Threat to Our Forests

A forested area in Kenilworth Park

December 8 2025

Stewarding Nearby Nature: The Residences at Kenilworth Park

A collage that says

December 1 2025

Our 2025 Holiday Gift Guide

Two students measure the circumference of a young tree.

November 24 2025

Checking in With Our 2025 GCA Urban Forestry Fellows

A large tree with a climbing rope

November 17 2025

Setting Our Sights High: The 2025 Tree Climbing Academy

November 2 2025

Mark Buscaino: Reflecting on Leadership, Legacy, and Trees

A hose spraying water towards the base of a young tree.

October 27 2025

A Farewell to 2025 Weekly Watering Alerts

A collage of three pumpkins and an invasive vine.

October 27 2025

What’s Really Lurking in Your Yard This Halloween

Leaves on the grass.

October 20 2025

October is Leave the Leaves Month!

An up close photo of orange leaves in the fall

October 6 2025

The Science of the Seasons: Fall Phenology

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

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

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