Looking up at the branches of sycamore trees in winter.

January 26 2026

The Science of the Seasons: How Trees Weather the Winter

December 21 2025

Bringing Winter Tree ID to Action

A closeup of an American holly tree.

December 17 2025

Evergreen Trees

January 21 2025

Winter Tree ID: Buds & Seeds

January 13 2025

Winter Tree ID: The Beauty of Bark

January 5 2025

Winter Tree Care

December 30 2024

Holiday Tree Disposal

December 9 2024

Winter Crafts for Families

December 11 2023

Evergreen Trees for Every Season

January 10 2022

Evergreen Trees You Can Get for Free in DC

January 3 2022

Community Tree Care: Adas Israel Cemetery

December 20 2021

Winter’s Here: Five Evergreen Trees to ID in DC

May 3 2021

Order Our Newest Species Guide

January 25 2021

The Nine Lives of Christmas Trees

December 14 2020

Tell the Difference Between Spruce and Pine Trees

December 14 2020

Trees that Bring Wonder to Winter

November 21 2018

Pruning 101

December 11 2017

Winter’s Here: Five Evergreen Trees to I.D. in D.C.