What Is Pa State Tree

What Is Pennsylvania’s State Tree: The Eastern Hemlock

Pennsylvania, known as the Keystone State, is rich in natural beauty with its diverse landscapes and abundant flora and fauna. As with many states in the United States, Pennsylvania has designated official symbols to represent its unique identity. One of these symbols is the state tree, the Eastern Hemlock (Tsuga canadensis). This majestic evergreen has played a significant role in Pennsylvania’s history and continues to be an important part of its ecosystem. In this article, we will explore the characteristics of the Eastern Hemlock, its significance to Pennsylvania, and answer some frequently asked questions about this iconic state tree.

Characteristics of the Eastern Hemlock:

The Eastern Hemlock is a coniferous tree native to the eastern regions of North America, including Pennsylvania. It is an evergreen tree that can reach heights of up to 150 feet, making it one of the tallest tree species in the state. The Eastern Hemlock has a slender, pyramidal shape with dense foliage composed of short, flat needles. These needles are dark green on top and have two white lines on the underside, giving the tree a distinct appearance.

One of the most distinctive features of the Eastern Hemlock is its ability to provide shade and shelter due to its thick, cascading branches. This characteristic has made it a popular choice for landscaping and for creating privacy screens. The tree also produces small, brown cones that contain seeds, which are an important food source for various wildlife species.

Significance to Pennsylvania:

The Eastern Hemlock has deep historical and ecological significance to Pennsylvania. It has been an integral part of the state’s forestry industry and played a vital role in the development of Pennsylvania’s early settlements. The tall, straight trunks of the Eastern Hemlock were highly sought after for timber and were used in shipbuilding, construction, and the production of railroad ties. The tree’s bark was also used for tanning leather.

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Beyond its economic importance, the Eastern Hemlock has been a crucial component of Pennsylvania’s natural ecosystems. It provides habitat and nesting sites for numerous bird species, including the state bird, the Ruffed Grouse. The dense foliage of the Eastern Hemlock helps to regulate temperature and humidity, creating a unique microclimate that supports a diverse range of plant and animal species. Additionally, the tree’s root system helps to prevent soil erosion, preserving the stability of Pennsylvania’s landscapes.


Q: How long does an Eastern Hemlock live?
A: Eastern Hemlocks have been known to live up to 800 years, making them one of the longest-living tree species in Pennsylvania.

Q: Are Eastern Hemlocks susceptible to any diseases?
A: Unfortunately, yes. Eastern Hemlocks are vulnerable to the Hemlock Woolly Adelgid, an invasive insect species that attacks and kills the tree by feeding on its sap. Efforts have been made to control and manage this pest to protect Pennsylvania’s Eastern Hemlocks.

Q: Can I plant an Eastern Hemlock in my backyard?
A: While it is possible to plant an Eastern Hemlock as a landscaping tree, it is important to consider the tree’s size and the specific requirements of your location. Hemlocks prefer shaded, moist environments and may not thrive in certain soil conditions. Consulting with a local arborist or forestry expert is recommended.

Q: How can I identify an Eastern Hemlock?
A: The Eastern Hemlock can be identified by its slender, pyramidal shape, short flat needles with white lines on the underside, and small brown cones. However, if you are unsure, it is always best to consult a field guide or expert for accurate identification.

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In conclusion, the Eastern Hemlock holds a significant place in Pennsylvania’s natural heritage as the state tree. Its towering presence, ecological importance, and historical significance make it a beloved and iconic symbol of the Keystone State. By understanding and appreciating the Eastern Hemlock, we can better protect and preserve this majestic tree for future generations.