Arbor Day Foundation

Washington Hawthorn: A Symbol of Hope


Crataegus phaenopyrum

Native to the southeast U.S., the Washington hawthorn was first discovered by an unknown explorer and taken to England in the late 1600s. It was commercially grown in Georgetown and became popular around Washington D.C., its namesake. The Washington hawthorn was originally a shrub, but grew popular in its tree form. In natural settings, the Washington hawthorn grows in a wild and unkept pattern.

Arbor Day Foundation Member Story: Larry Hobart

A Life of Poetic Thoughts and Good Deeds

Know the joy of helping the world
to be a better place.
Put a shovel in the ground,
leave a tree your family can trace.

Meet Larry. Poet, philosopher, gentleman, and Foundation member. His passion for life and making a difference in the world can be felt through his poems. Larry wrote the excerpt above, expressing his love of planting trees.

The Right Tree for the Right Place


Trees offer so much to home landscapes and benefit homeowners and the communities they live in whether it’s shade, beauty, privacy, windbreak, or higher property values. But these benefits are only enjoyed when you plant the right tree in the right place.

The Kousa Dogwood


 Cornus kousa

Dogwood trees are well known for their delicate beauty in the landscape. Kousa dogwood not only meets the standard for attractiveness, it adds a hardiness that makes this species an excellent choice for home landscapes and urban areas.

Experts Learn How to Protect Trees AND Utility Lines


Guest post by Phil Charlton, Ph.D. Executive Director, Utility Arborist Association.

North America depends on electricity and gas. Admittedly, I get my energy from caffeine but I depend on electricity to make the coffee. My house is heated with gas. I depend on streetlights and stop lights, both of which depend on electricity. Our jobs, factories, and every other part of life are possible because of the electric and gas infrastructure that supplies our homes and businesses. 

The Living Forest: What Tree Rings Tell Us About the Life of a Tree


Trees are great record keepers, they tell us so much about the past. They are also resilient organisms, outliving humans and animals. Some of the oldest trees in the world are thousands of years old — like bristlecone pine. They’ve lived through major environment changes, climate shifts, and numerous historical events. There are trees standing today that are older than the establishment of this country, how remarkable.

We can learn a lot from trees, but first we must understand them.

Simpson Nurseries Helps Deliver Trees to Homeowners


Have you ever placed your hand against the window only to jerk it back from the heat of the glass? Or maybe the frost on the outside was cooler than you anticipated. Summer heat and winter frosts can make it difficult for your house to maintain a comfortable indoor temperature. When your home sits openly under the warmth of the sun or fights heavy winds, it must work harder to stay cool or keep warm.

Ask an Arborist: How Do I Check for Tree Pests?

Tree health is an important aspect of tree care.

Tree health is an important aspect of tree care. There are numerous reasons a tree may look unhealthy including factors such as drought, disease, invasive species, pests, and improper care. Distinguishing the difference between a pest infestation or tree stress can be challenging when many of the symptoms look similar. However, knowing what species your tree is and whether there are known pests or diseases to that species will help narrow down possible threats.


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