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 […]

February 18 2025

Phenology February Semi-Finals

February 18 2025

Advocacy Update: Our Successes and Legislation We’re Tracking

February 18 2025

Spring Events are Around the Corner

February 10 2025

Phenology February Continues

February 10 2025

2024 Recap: Temps & Drought

February 10 2025

Environmental History is Black History

February 3 2025

Growing Forward: Casey Trees Announces Executive Leadership Transition

February 3 2025

Phenology February is Back!

January 27 2025

Honoring Dr. King Through Service in Anacostia Park

January 27 2025

Looking Back at MANTS 2025

January 27 2025

Winter Tree ID: Form

January 21 2025

Where Nature’s Canvas Meets Human Creativity

January 21 2025

Late Winter Events

January 21 2025

Winter Tree ID: Buds & Seeds

January 13 2025

Arlington’s Tree Canopy – Modest Gains, Big Opportunities

January 13 2025

2025 Spring Break Camp

January 13 2025

Winter Tree ID: The Beauty of Bark

January 6 2025

New Year, New You!

January 6 2025

Last Call for the GCA Fellowship

January 5 2025

Winter Tree Care

December 30 2024

Reflecting on a Year of Community at Casey Trees

December 30 2024

Thinking About Trees as an Investment

December 30 2024

Holiday Tree Disposal

December 23 2024

2024: Our Impact by the Numbers