The tree
Species, age, and what is normal for it; canopy density and color; new growth; deadwood; past pruning.
Independent by Design
The diagnosis is separate from selling the work.
ArborSolutions provides inspection, diagnosis, and documentation without selling treatments, pruning, or removals.
If work is recommended, you choose who does it.
The Question in Front of You
What is a tree health assessment?
What is a tree health assessment? It is an on-site evaluation of a tree’s condition — canopy, trunk, root collar, root zone, and site — to identify signs of decline, the factors that may be contributing, and practical options for care or monitoring. It is a diagnosis of condition, not a sales visit.
Most trees don’t decline from a single cause. Water, soil, roots, site changes, pests, and disease tend to stack up over several seasons.
The goal is to sort out what is worth a closer look from what is normal for that species, so you can decide what makes sense before spending money on treatment, pruning, or removal.
Signs Worth a Closer Look
What you may be seeing
- Thinning canopy, early leaf drop, or leaves that are small, yellow, or scorched
- Branch dieback, especially at the top or outer edges of the canopy
- Dark staining, oozing, or cracked and loosening bark on the trunk
- Mushrooms, conks, or other fungal growth at the base or on the trunk
- Small holes, boring dust, or unusual insect activity
- A tree that changed after construction, trenching, grading, new irrigation, or new landscaping
Some of these are normal for certain species or seasons. Others point to a problem that is easier to manage when it is found early.
What We Look At
What the assessment looks at
Trunk & root collar
Bark condition, staining or bleeding, cankers, fungal growth, mechanical damage, and whether soil or mulch is piled against the trunk.
Root zone & soil
Compaction, grade changes, trenching, paving, drainage, and signs of root damage or girdling roots.
Water
Drought stress, overwatering, irrigation patterns near the trunk, and how the site drains in wet years.
Site history
What changed and when — construction, new landscaping, irrigation changes, storm damage, or neighboring work.
Pests & disease signs
Visible symptoms and signs that suggest insects or pathogens, and whether laboratory confirmation would change the answer.
Central Coast Context
Central Coast conditions change the picture.
Our long dry summers and occasional very wet winters affect trees differently than in most of the country.
Native oaks are a common example: they evolved with dry summers, and UC oak specialists note that summer irrigation near the trunk favors oak root fungus and Phytophthora root rot — a frequent factor in oak decline in irrigated yards.
Other common contributors here include soil compaction from vehicles or construction, root loss from trenching and grade changes, and trees stressed by drought one year and saturated soil the next.
Health vs. Risk
Health and risk are different questions.
A declining tree is not automatically a dangerous tree, and a healthy-looking tree can still have a structural defect.
A health assessment focuses on condition and causes of decline. If the inspection turns up signs that a tree or branch could fail and strike people or property, a formal tree risk assessment can be scoped separately.
What You Receive
What your assessment includes
Depending on the assignment, findings may be explained on site or provided as a written summary with photographs.
ArborSolutions does not sell treatments, pruning, or removals. If work is recommended, you choose who does it.
Findings typically cover:
- What was observed, with photographs
- What appears to be happening and the factors likely contributing
- Care options worth considering — irrigation, mulch, soil, or pruning needs
- What to monitor, and what changes would justify another look
- Whether laboratory testing, a specialist, or a tree risk assessment would add useful information
A Straightforward Process
From your first call to clear answers.
Tell us what you’ve noticed
What changed, when it started, and any recent work on the property. Photos help.
Agree on the scope
Which trees, what question you need answered, and whether a written summary is needed.
Inspect the site
An on-site look at the tree, the root zone, and the conditions around it.
Understand the findings
What may be affecting the tree, what your options are, and where to start.
Who We Help
Who calls for a tree health assessment
Homeowners
A valued tree is changing and you want to know why before anyone starts cutting or treating.
HOA boards & managers
Several trees are declining and the board needs an independent read before approving a contractor’s proposal. See also our HOA documentation services.
Buyers & sellers
Large or heritage trees on a property you are buying or selling.
After site work
Construction, trenching, or landscaping happened near a tree and it hasn’t looked right since.
Questions
Clear answers before you call.
What is a tree health assessment?
An on-site evaluation of a tree’s condition and its site to identify signs of decline, the factors likely contributing, and practical options for care or monitoring.
Is a tree health assessment the same as a tree risk assessment?
No. A health assessment looks at condition and causes of decline. A tree risk assessment evaluates the likelihood that a tree or tree part fails and strikes a target, and the consequences. If health findings raise a structural question, a tree risk assessment can be scoped separately.
Can you tell whether my tree is dying?
Often an inspection can tell whether a tree is in decline and what is likely contributing. Some causes can’t be confirmed visually; when a laboratory test would change the answer, that is noted in the findings.
Should I water my oak in summer?
For established native oaks, frequent summer irrigation near the trunk is generally discouraged because it favors root diseases. The right answer depends on the tree’s age, condition, and site, which is part of what an assessment looks at.
Do you treat, prune, or remove trees?
No. ArborSolutions provides inspection, diagnosis, and documentation only. If work is recommended, you choose the contractor.
What areas do you serve?
Santa Barbara County and San Luis Obispo County, California.
Have more questions? Browse the Answer Library for tree, landscape, and property documentation answers.
Assessment limitations matter.
Findings are based on visible, accessible conditions at the time of inspection. Some causes of decline can’t be confirmed without laboratory testing or further investigation, and no assessment can guarantee a tree’s future health.
ArborSolutions does not provide legal advice and does not guarantee municipal, HOA, insurance, lending, or other third-party acceptance or outcomes.
Reference
Guidance cited on this page.
- UC Oak Woodland Management. Frequently Asked Questions — summer irrigation, oak root fungus, and Phytophthora near native oaks. oaks.cnr.berkeley.edu.