Tree & Shrub Health

Fertilization & Soil Management

Healthy soil is the foundation of a thriving landscape. We offer fertilization and soil management services to ensure your trees and shrubs receive the nutrients they need. Our customized fertilization plans promote robust growth and resilience. Our Port City arborist will pick out the right soil management program that is needed for your trees and shrubs on the initial visit. Over time this program will evolve based on the health performance of your trees and shrubs in tandem with our ever-evolving climate.

Insect, Mites & Disease Control

Pathogens can damage trees and shrubs. Our pest management includes monitoring, early detection, boosting plant immune systems, and targeted treatments to control infections. We aim to minimize pesticide use and improve plant health by enhancing soil structure.

Tree Health Assessment

Our arborists conduct thorough health assessments to identify any issues affecting your trees. We diagnose problems such as pest infestations, diseases, and nutrient deficiencies and provide appropriate treatments. In addition to assessing the overall health we offer qualitative tree risk assessments.

Tree & Shrub Scout

Have that “set it and forget it” mentality? You just want it to be taken care of? Participate in our monthly IPM (Integrated Pest Management) Scout program and have us monitor, treat, and improve the health of your trees and shrubs as needed.

Root Zone Excavation

Different root zone excavations can be done based on the site history and planting needs. The main aim is to remove excess soil and reduce compaction for better root growth and soil aeration. If roots are not visible, the tree may be planted too deeply, needing immediate soil removal to prevent girdling roots, which can kill trees prematurely. Root pruning may be necessary for girdling roots depending on their size. Excavations can be performed before construction to avoid tearing roots and after construction to relieve compaction. Speak with our arborist to see if a root zone excavation is right for your tree.

construction excavator

Pre-Construction Consultation

Consult an arborist to plan for tree protection or removal before construction. Home additions can meet your family's needs. Discuss with a local arborist about trees near your construction site. Remove those too close to the project, and take measures to protect trees that can be saved.

Zimmerman Pine Moth FAQ

What is the Zimmerman Pine Moth?

This disease is caused by a nematode that likely arrived in the U.S. on a Japanese bonsai tree. Beech trees in Japan evolved alongside the pest and can tolerate it — but ours haven’t. The nematode has been spreading across the eastern U.S., and now it’s reached New Hampshire. It’s not caused by climate or soil issues — it’s a biological invasion we’re actively fighting.

Zimmerman Pine Moths primarily target:
Eastern White Pine (most commonly affected due to its prevalence)

  • Scotch Pine
  • Austrian Pine
  • Red Pine
  • Mugo Pine

Trees under stress from drought, poor soil, or previous damage are more susceptible to infestation.

Common signs of Zimmerman Pine Moth infestation include:

  • Thinning canopy or yellowing needles
  • Crooked branching or dieback at the top of the tree
  • Globs of sap on the trunk, sometimes accompanied by small exit holes
  • Structural weakness in the wood, often exacerbated by woodpecker activity

It’s important to note that sap production doesn’t always indicate Zimmerman Pine Moth. Other factors, such as mechanical injury, stress, or other insects, can also cause sap to appear. A professional diagnosis is recommended.

The optimal treatment windows are:

  • Spring (when larvae are beginning to burrow)
  • Late summer to early fall (typically late August to early September)

Timing can vary depending on local temperatures—warmer springs may cause earlier activity.

Yes, especially if the tree is already stressed or declining. The moth accelerates the tree’s decline, but the tree’s overall health plays a crucial role. Treating the insect is important, but maintaining proper tree care, watering, and nutrients is essential for long-term survival.

Does Zimmerman Pine Moth damage make a tree unsafe?

Zimmerman Pine Moth damage can weaken trees structurally. Additionally, woodpeckers often feed on the larvae, creating more holes and potentially accelerating decay. It’s important to assess tree health and structural stability if infestation is suspected.

Treatments include:

  • Soil applications (systemic insecticides absorbed by the tree)
  • Bark applications (targeted insecticides applied to the trunk)

Proper timing and application are crucial for effectiveness. Homeowners attempting DIY treatments often use incorrect products or apply them at the wrong time, which may harm the tree.

Yes. Prevention focuses on tree health management:

  • Adequate watering and irrigation
  • Proper sunlight exposure
  • Nutrient-rich soil and fertilization
  • Avoiding mechanical injuries to trees

Healthy trees are far more resistant to Zimmerman Pine Moth infestations than stressed trees.

If you suspect your pine tree is infested:

  • Call a certified arborist for inspection
  • Ensure proper diagnosis—sap alone does not confirm infestation
  • Follow professional treatment recommendations for timing and product selection

Professional inspections also consider other potential stressors, such as soil compaction, root damage, or drought, which may contribute to or exacerbate the problem.

Incorrect treatment can waste money and potentially harm the tree. Sap can result from multiple causes, so professional confirmation ensures that the treatment targets actual Zimmerman Pine Moth activity and addresses any underlying tree health issues.

TREES & SHRUBS

Whether you’re curious about the species of plants on your property or concerned about the integrity of your trees

Schedule your free property assessment