Species and Varieties

Information on selecting the best varieties of trees and shrubs, including walnut, oak, pine, hemlock, beech, ironwood, viburnum, crabapple, boxwood, fir, ash, pachysandra, poplar, privet, hackberry, holly, dogwood, elm, hawthorn and hickory.

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Red-Dosier Dogwood
Shrubs and Trees for the Winter Landscape - News News
Does your winter garden resemble a black and white photograph? In spite of short, dark days and a blanket of snow, your landscape need not be drearily dull. More
Windbreaks and Shade Trees
Windbreaks and Shade Trees - Articles Articles
This publication provides information for homeowners interested in using shade trees and windbreaks for energy savings. More
Wild bees like this bumble bee are essential to Pennsylvania agriculture.
Conserving Wild Bees in Pennsylvania - Articles Articles

Conserving Wild Bees in Pennsylvania

Mary Barbercheck, Ph.D., David Mortensen, Ph.D.

Wild bees, which include native and naturalized bees, pollinate a variety of crops. In areas of Pennsylvania, wild bees already provide the majority of pollination for some summer vegetable crops. More
Galls on Oak
Galls on Oak - Articles Articles
There are a variety of gall-forming species of small wasps that commonly infest oak trees in Pennsylvania. More
Planting and After Care of Community Trees
Planting and After Care of Community Trees - Articles Articles

Planting and After Care of Community Trees

William Elmendorf, Ph.D., Larry Kuhns

This publication is for people who plant trees in public landscapes, such as streets and parks, but its advice also is useful to those who plant trees around homes and businesses. More
Oakleaf hydrangea in full bloom. Notice the shape of the leaves. Photo: T. Butzler, Penn State
A Guide for Selecting Shrubs for Pennsylvania Landscapes - Articles Articles
Information for over 100 shrubs, including: the selection and aesthetic qualities of shrubs, and shrubs for specific conditions. More
Lacy L. Hyche, Auburn University, Bugwood.org
European Fruit Lecanium - Articles Articles
The European fruit lecanium is a key soft scale insect pest of shade trees and other woody ornamental plants in Pennsylvania. More
Ward Upham, Kansas State University, Bugwood.org
Elm Leaf Beetle - Articles Articles
The elm leaf beetle is an introduced pest that feeds only on species of elm. Trees growing in landscapes are more heavily infested than those in forests. More
Phytophthora on African violet
Phytophthora Root Rot On Woody Ornamentals - Articles Articles
Fungus-like organisms belonging to the genus Phytophthora are soil- or plant-borne and all are plant pathogens. More
The fragrant yellow flowers open in early spring and standout against the backdrop of the green foliage.
The Multi-Faceted Oregon Grapeholly - Articles Articles
Looking to add some diversity and oomph to your pollinator garden? Or maybe create a landscape that you can also eat? Check out the Oregon grapeholly. More
The Noblest Tree
The Noblest Tree - Articles Articles

The Noblest Tree

Sandy Feather

Michael Dirr describes the American beech (Fagus grandifolia) as “a sturdy, imposing tree often with a short trunk and wide-spreading crown, a picture of character.” More
Cornus mas form in flower. Photo: Sandy Feather
When Corneliancherry Dogwood Blooms, Spring is Not Far Behind - Articles Articles
Cornus mas blooms on bare branches in March, with leaves following a bit later. More
Photo: Michael Masiuk
Tough and Beautiful is Hard to Beat - Articles Articles
Parrotia persica, also known as Persian ironwood, is native to a relatively small region of northern Iran and Azerbaijan, near the southern edge of the Caspian Sea. More
A fresh snowfall shows great contrast between the white snow and the blue, shrunken fruit of Viburnum nudum ‘Winterthur’.
Viburnum nudum ‘Winterthur’ - Articles Articles
V. nudum ‘Winterthur’ is well adapted to most of the mid-Atlantic region and southern US, and performs well in a variety of conditions. More
Black walnut fruit. Photo: K. Salisbury, Penn State
Working With the Black Walnut - Articles Articles
Black walnut is one of the last trees to leaf out in the spring and one of the first to lose its leaves in the fall. More
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