News & Updates

A honeybee and a bumblebee circle the flowers of an American linden tree.

June 29 2026

Why Pollinators Need Trees, Too

Have you heard the latest buzz? Last week was National Pollinator Week, an annual celebration to honor and raise awareness […]

Looking up at a tree canopy and the summer sun

June 22 2026

The Science of the Seasons: Summer Phenology

This article is part of a recurring series in collaboration with Bartlett Tree Experts on the seasonal expressions of phenology […]

Top of a tree of heaven.

June 8 2026

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

Smelling like burnt peanut butter, crowding out native species, and playing host to one of the most notorious invasive insects […]

June 1 2026

DC’s New Tree Protections: A Win for Our City’s Trees and Residents

A group of people gathered at the grand opening of Ravenswood.

June 1 2026

From Overgrown to Forever Protected: Riverdale Welcomes a New Community Forest

May 18 2026

Looking Back on an Impactful Planting Season

May 18 2026

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

Picture of 3 different blooming trees

May 11 2026

Seven Beautiful Trees That Are Late Bloomers

Green Budget Day rally crowd

May 4 2026

Advocacy Update: DC’s Next Budget

Volunteers planting a tree in Lincoln Park.

April 13 2026

Tree Plantings for America’s 250 Begin at Lincoln Park

April 6 2026

Trees: Celebrating DC’s Homegrown Monuments

A member of the Casey Trees team waters a young tree

April 6 2026

Weekly Watering Alerts Are Back!

Lake Arbor Tree Planting Landscape

March 23 2026

Tee Time to Tree Time: A Lake Arbor Golf Course Transformation

A closeup of a Yoshino Cherry blossom.

March 16 2026

Cherry Blossom Season is Here! Find Blooms Near You.

A bumblebee on a plant

March 16 2026

Casey Trees Awarded Nearly $500,000 to Create Wildlife Corridors Across Washington, DC

Trees around a home with solar panels

March 9 2026

Reducing Energy Costs with Trees

A collage of Eastern Redbud and Red Maples trees with the

March 2 2026

Finally, Our Phenology February Champion

Frederick Douglass' home at Cedar Hill; a house on a hill surrounded by large trees.

February 23 2026

Frederick Douglass and the Nature at Cedar Hill

Two volunteers removing an invasive vine from a tree.

February 23 2026

Saving Trees, One Vine Removal at a Time

A collage of trees with the

February 2 2026

Phenology February is Here!

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

February 2 2026

Can Trees Predict the Weather?

Looking up at the branches of sycamore trees in winter.

January 26 2026

The Science of the Seasons: How Trees Weather the Winter

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