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Spotted Lanternfly: What to Look For
Spotted Lanternfly: What to Look For - Articles Articles
Spotted Lanternfly, Lycorma delicatula, is a new threat to Pennsylvania and the United States, and experts are still learning how to combat it. More
Mulching Landscape Trees
Mulching Landscape Trees - Articles Articles

Mulching Landscape Trees

David R. Jackson

Mulches are materials placed over the soil surface to enhance landscape beauty, improve soil conditions, protect plants from foot traffic and lawn equipment, and suppress weeds. More
Snow damage on juniper. Photo credit Sandy Feather.
Winter Damage to Trees and Shrubs - Articles Articles
Learn the best ways to prevent and remedy damage to trees and shrubs caused by ice and snow. More
Diagnosing Injury to Woody Ornamentals
Diagnosing Injury to Woody Ornamentals - Articles Articles
Adapted from Johnson, W.T. and H.H. Lyon. 1991. Insects that feed on trees and shrubs. 2nd ed., Cornell Univ. Press, Ithaca, New York, 560 pp. More
Boxwood Diseases
Boxwood Diseases - Articles Articles

Boxwood Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Boxwood diseases. More
Maple Diseases
Maple Diseases - Articles Articles

Maple Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Maple diseases. More
Oak Diseases
Oak Diseases - Articles Articles

Oak Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Oak diseases. More
Spruce Diseases
Spruce Diseases - Articles Articles

Spruce Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Spruce diseases. More
Seeds from a Gala apple are not guaranteed to sprout another Gala apple tree. Grafting and budding allows you to get your desired variety. First, you will need to chill the seed for it to germinate, and you can do so by following one of three methods.
Hobbiest Gardening - Growing Fruit Tree Plants from Seed - Articles Articles
Many people mistakenly believe that fruit trees come true to name from seeds, but the seeds from a fruit actually produce a new variety that is a hybrid of two plants. More
Petite cones of Canada Hemlock. Photo: Kathy Salisbury
Evergreen Native Plants - Articles Articles

Evergreen Native Plants

Kathleen V. Salisbury

After the autumn leaves fall we start thinking of plants that will keep our interest throughout the winter. More
Tree Diseases that Create Hazards
Tree Diseases that Create Hazards - Articles Articles

Tree Diseases that Create Hazards

Gary W. Moorman, Ph.D.

Certain diseases of trees weaken their structure and create a hazardous situation where serious damage could result from falling limbs or the toppling of the entire tree. More
Hemlock Woolly Adelgid (HWA)
Hemlock Woolly Adelgid (HWA) - Articles Articles
Hemlock woolly adelgid is a destructive, introduced pest of forest and ornamental hemlock trees. More
Abiotic Diseases Of Woody Ornamentals
Abiotic Diseases Of Woody Ornamentals - Articles Articles

Abiotic Diseases Of Woody Ornamentals

Gary W. Moorman, Ph.D.

Of the two major types of diseases of woody ornamentals; biotic and abiotic—abiotic diseases are by far the most important ones on landscape and nursery plants. More
Pruning Landscape Trees
Pruning Landscape Trees - Articles Articles

Pruning Landscape Trees

William Elmendorf, Ph.D., Henry Gerhold, Ph.D.

Proper pruning of landscape trees improves their structural strength, maintains their health, enhances their beauty, and increases their value. More
Using Trees and Shrubs for Privacy and Wind Screening
Using Trees and Shrubs for Privacy and Wind Screening - Articles Articles

Using Trees and Shrubs for Privacy and Wind Screening

Emelie Swackhamer, Jim Sellmer, Ph.D.

Residences benefit from trees and shrubs planted specifically to block unwanted views or prevailing winds. More
Trees, Shrubs, and Groundcovers Tolerant of Wet Sites
Trees, Shrubs, and Groundcovers Tolerant of Wet Sites - Articles Articles

Trees, Shrubs, and Groundcovers Tolerant of Wet Sites

Jim Sellmer, Ph.D., J. Robert Nuss, Scott Guiser

Very few plants will grow when soil is constantly saturated; however, some trees, shrubs, and ground covers are more tolerant of wet sites than others. More
Trees, Shrubs, and Groundcovers Tolerant of Dry Sites
Trees, Shrubs, and Groundcovers Tolerant of Dry Sites - Articles Articles

Trees, Shrubs, and Groundcovers Tolerant of Dry Sites

Jim Sellmer, Ph.D., J. Robert Nuss, Scott Guiser

Dry soil can exist when there is simply not enough water to supply plant roots in a growing area. More
Shade Tolerant Trees, Shrubs, and Groundcovers
Shade Tolerant Trees, Shrubs, and Groundcovers - Articles Articles

Shade Tolerant Trees, Shrubs, and Groundcovers

Jim Sellmer, Ph.D., Scott Guiser

Most plants grow best in full sunlight and all plants need some light to survive. More
Landscaping and Gardening Around Walnuts and Other Juglone Producing Plants
Landscaping and Gardening Around Walnuts and Other Juglone Producing Plants - Articles Articles
Walnuts and hickories produce the chemical juglone (5 hydroxy-1,4- napthoquinone), which is exuded from all parts of the plant. More
Rhododendrons and azaleas
Evergreen Shrubs and Trees for Pennsylvania - Articles Articles

Evergreen Shrubs and Trees for Pennsylvania

Rick Bates, Ph.D., J. Robert Nuss

This article explains hardiness and site requirements, landscape use, and characteristics of selected evergreen plants. 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

A Guide for Selecting Shrubs for Pennsylvania Landscapes

Jim Sellmer, Ph.D., J. Robert Nuss

Information for over 100 shrubs, including: the selection and aesthetic qualities of shrubs, and shrubs for specific conditions. More