Tree Care

The Arborist Short Course is a four-day workshop designed to increase working tree knowledge and prepare participants for the ISA Certified Arborist exam.

Short course prepares professionals to become Certified Arborists and provide research-based tree care education.

Many insects that feed on trees cause cosmetic/aesthetic damage only. Learning the key insects that impact tree health is critical when managing urban trees.

Trees are an integral part of our health. Learn about the research between healthy trees and healthy people during this virtual event.

This article explains why utility companies prune trees, what directional pruning is, how a tree should look after it is directionally pruned, and other options for trees near powerlines.

This article answers five common questions about trees and utilities, and how conflicts between trees and wires can be resolved.

Trees help improve water quality, increase property values and make neighborhoods more visually appealing. This article provides tips for choosing, planting, and caring for backyard trees.

This publication explains tree health and environmental considerations and details how to preserve trees.

Mulches are commonly used to enhance the beauty of landscapes, suppress weeds, conserve soil moisture, and buffer plants from the damaging effects of traffic and lawn equipment.

The life expectancy of a tree is influenced by a number of factors.

Researchers, foresters, and arborists continue to work hard to manage insect pests impacting the Pennsylvania state tree.

Mimosa webworm can cause unsightly browned foliage on honeylocust, but typically has minimal impact on tree health.

The Arborist Short Course Series is a ten-day webinar series designed to increase working tree knowledge and prepare participants for the ISA Certified Arborist exam.

With above average temperatures and below average precipitation, extra attention to watering is needed to keep newly planted trees thriving.

Also called slime flux, this disease affects several species of trees.

This Pennsylvania Urban and Community Forestry Fact Sheet explains the dangers of tree topping and what measures should be taken to prevent them.

While you may need to bundle up, the cold temperatures of winter make for a great time to prune.

Proper pruning of landscape trees improves their structural strength, maintains their health, enhances their beauty, and increases their value.

Our long history with the white pine continues as modern diseases take root.

How can you begin to repair storm damage done to your trees?

A look at how trees respond to high temperatures and reflected heat, especially in the built environment.

Need a refresher on good pruning practices? Want to try techniques on somebody else's plants?

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.