Central Pa Native Plant Festival - Saturday, May 6, 2023
New location -
Millbrook Marsh Nature Center
click here for details
2023 Annual Facebook Photo Contest
Our annual Facebook Photo Contest is officially open for 2023. Click here for details
The Dirty Dozen vs the Birdy Dozen
As you look to planning for spring during the remaining winter months, remember the Dirty Dozen, a list of twelve invasive plants frequently found at nurseries and landscape retailers that should be avoided. The Dirty Dozen
Better yet, considering adding some of the Birdy Dozen to your gardens to attract birds.
The Birdy Dozen
Check more information on Invasive Plants and recommendations for alternatives on our Plant Information and Landscaping page.
Eastern Hemlock (Tsuga canadensis) is native to southern Canada, the northeastern United States, and all of the Appalachian Mountains down to Georgia. In the wild, it thrives on the north slopes of hills and mountains or tucked into ravines, where there is more shade, cooler conditions, and more moisture in the acidic, organic, well-drained soils of slopes.
Reaching heights of 70 - 150 feet, it is slow growing and is very long lived, with the oldest recorded specimen, found in Tionesta, Pennsylvania, being over 550 years old. One of the more shade-tolerant evergreens, the Eastern hemlock is a versatile landscape option – it can be used as a specimen tree, a living screen, and/or pruned into a hedge. Its fine-textured foliage gives it a delicate, lacy look. Little brown cones appear in fall/winter.
Unfortunately, Eastern hemlocks have been under attack since the 1990’s from the hemlock wooly adelgid - a sap sucking insect that originated from Asia. This pest has decimated many of the large stands of hemlocks in our forests. Thankfully, it can be controlled in the landscape with the use of a systemic insecticide, imidacloprid or dinotefuran.
Eastern hemlocks provide much needed shelter to birds and animals during the winter months and provide an evergreen interest to the winter landscape.
Article and photo courtesy of Diane Albright
What is a Native?
A native plant is one that occurs naturally in a particular region, ecosystem, or habitat without direct or indirect human intervention. We consider the flora present at the time Europeans arrived in North America as the species native to the eastern United States. Native plants include all kinds of plants from mosses and ferns to wildflowers, shrubs, and trees.
Because native plants are adapted to the growing conditions where you live, they are often easier to grow, and less susceptible to challenging conditions than non-native plants. Many Non-native plants are also invasive, and threaten out our native plant species.
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PNPS is committed to supporting programs and events advocating for the use of native plants. Money obtained from memberships and donations go to the following:
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We are over 14,000 members strong and growing!