Our state tree, the Eastern hemlock, is under threat by the invasive hemlock woolly adelgid! This greatly affects forest and stream ecosystems. We’re working to control the spread of invasive HWA in select stands of hemlock trees on some of our preserves: Wolf Creek Narrows Natural Area, Marshall Preserve and Bennett Branch Forest. Working closely with the PA Department of Forestry and after careful evaluation and testing, our land staff and our Pennsylvania Natural Heritage Program (PNHP) scien
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Our state tree, the Eastern hemlock, is under threat by the invasive he…
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Eastern Hemlock Health Update
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psu.edu
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Eastern hemlock is a coniferous tree native to North America. The Eastern Hemlock is the state tree of Pennsylvania and a keystone tree here at Dingmans Falls. Mature trees can reach heights up to 115 feet with a typical diameter of 30 inches. In the park, eastern hemlocks tend to grow in glacial ravines, like where many of the park's waterfalls are. In these ravines, the hemlocks produce a dense canopy and forest, keeping the streams that run through the ravines cool. These trees create wonderf
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