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Black walnut fruit. Photo: K. Salisbury, Penn State
Working With the Black Walnut - Articles Articles

Working With the Black Walnut

Kathleen V. Salisbury

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
Consider including violets in landscapes, or just leaving them where they are doing well. Photo: Kathleen Salisbury
Underused Native Plants: Common Blue Violets - Articles Articles
Native plants have become very popular over the years. More
Gypsy Moth Larvae
Gypsy Moth Larvae - Articles Articles

Gypsy Moth Larvae

Kathleen V. Salisbury

Gypsy Moth larvae can devastate a forest. 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
Plant Disease resistant varieties like this PrairiFire Crabapple, which is also resistant to scab, rust and mildew. Photo by K Salisbury, Taken at the Almshouse Arboretum of Bucks County Extension Doylestown PA
Fire Blight in the Ornamental Landscape - Articles Articles
This disease, caused by Erwinia amylovora attacks more than 75 species of trees and shrubs. More
Leaves of a young Swamp White Oak (Quercus bicolor) may remain on the tree early into spring. Photo: Kathleen V. Salisbury
Why Do You Just Keep Me Hanging On? - Articles Articles

Why Do You Just Keep Me Hanging On?

Kathleen V. Salisbury

Have you ever noticed some trees hang on to their leaves after all the other have colored up and fallen to the ground? More