Tree Care

Different types of cuts can have a big impact on how a tree responds to pruning.

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

Enjoy a guided nature walk in a fun, family-friendly setting while exploring the trees of Penn State and learning to identify the diverse species that shape its beautiful campus.

Learn the fundamentals of tree maintenance and how to safely climb trees during this in-person event.

Become a Tree Tender and help increase the tree canopy in your community!

Strengthen your arborist skills with training in tree biology, care, and risk management while preparing for the ISA Certified Arborist exam.

Non-living (abiotic) stressors abound in cities and towns, making it tough for trees to grow and stay healthy.

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.

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

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.

Some moths in their caterpillar stage feed on tree leaves and can potentially be harmful to tree health.

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

Through a process of chemical and physical compartmentalization, trees are able to stop or slow the movement of wood decay fungi around wounds

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

Integrating drones into pest management strategies, even at scales as small as a single tree, represents an evolution of agriculture and urban forestry.

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.

Wind and storms over the winter can leave broken branches or other failing tree parts within the canopy. Late winter into early spring is a good time to inspect trees before leaves emerge.

When caught early, girdling roots should be cut to avoid future tree health and structural problems. But what should be done when girdling roots have grown larger?

Scientific research helps us debunk common tree myths and understand how to keep trees healthy and safe by understanding how trees work.

Woolly aphids often infest pairs of host tree species.

This quick-reference pocket field guide features assistance with implementing land-care practices that help meet landowner goals. Additionally, it offers information on improving woodland health, succession, and more.

Leaning trees should be inspected to determine risk to nearby people or property and any potential corrective actions.

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

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