How to Tell if a Tree Is Unhealthy Before You Call an Arborist

If a tree looks thin, brown, or newly lopsided, do a ground check first, then book a tree health inspection when the signs keep spreading or sit over a house or driveway. You can see what changed. You cannot reliably name the cause from the sidewalk. 

This is written for Greater Austin homeowners who want that first read without guessing at disease or cutting into the tree themselves. No climbing gear. No weekend surgery. 

Signs you can check from the ground 

Stand far enough back to see the whole crown, then walk a slow circle. Look for patterns, not one ugly leaf. 

Watch for: 

• A canopy that is thinner on one side 

• Dead tips that do not leaf out with the rest of the tree 

• Large limbs that stay bare while neighboring trees fill in 

• A sudden carpet of green leaves in the wrong season 

• Fresh twigs or bark chips under the drip line that were not there last month 

• A tree that used to shade the driveway and now lets a lot more sky through 

Those patterns matter more than a few yellow leaves after a hot week. Do not climb, and do not snap live wood just to test it. 

Leaf, canopy, and seasonal vs problem browning 

Central Texas summers are hard on trees. A live oak and other shade trees often look tired in drought: dull color, some leaf drop, slower growth. That can reverse when rain returns if the tree still has a full framework of live wood. 

Problem browning looks more stubborn: 

• Whole branches stay brown while the rest of the crown is green 

• Browning starts in one section and keeps spreading 

• Leaves wilt and hang instead of dropping cleanly 

• The same limbs fail to leaf out after the next growth flush 

Treat that last pattern as a reason to get an assessment rather than another month of hope. 

Trunk, bark, and root clues that mean a tree health inspection is next 

The crown is only half the story. Walk up to the trunk and look at the bark from several angles. 

Flags that move you from “watch it” to “get it assessed”: 

• Fresh cracks or splits after a storm 

• Cavities, wet or dark patches, or oozing bark 

• Loose plates of bark that expose bare wood after construction, trimmer damage, or a vehicle bump 

• A buried root flare (mulch or new grade hiding the natural widening at the soil) 

• Mushrooms or conks at the soil line 

• A new lean toward the house, garage, or street 

Do not scrape fungus or cut into the flare to clean it up. Those are reasons to schedule a tree health inspection. 

A new lean plus heaving soil, a raised root plate, or a cavity on the tension side of the lean is past a casual watch list. 

When a lean, cavity, or fungus is more than cosmetic 

Ask three practical questions: 

1. Could this tree hit a roof, driveway, play area, or neighbor’s structure if a major limb or the trunk failed? 

2. Has the lean or cavity changed since the last storm? 

3. Are there fungal brackets or mushrooms that were not there last year? 

If any answer is yes, treat the tree as a risk until someone trained can look at it. Keep people and vehicles out of the fall zone. If a limb is already hanging over a structure after wind, that is an emergency, not a research project. 

What a homeowner tree check can and cannot tell you 

A yard walk can tell you that something changed, which tree, which side, and whether people or buildings sit in the way. It cannot tell you, with confidence, why the canopy thinned or whether the tree will recover. 

Photos help a crew prepare. A phone picture rarely settles oak wilt versus drought stress, internal decay, or root damage from a new driveway. DIY “tree survey” write-ups are often school or inventory checklists, not a decision tool for a mature oak. 

People often ask who can tell them if a tree is healthy. A neighbor can share what they see. A landscaper can flag obvious dead wood. A reliable answer about health, risk, and next steps comes from an arborist who looks at the whole tree on site. 

DIY look vs a professional arborist assessment

Your job is to notice and stay safe. Removal is one possible outcome, not the default. If someone quotes tree removal from the driveway without walking the tree, get a second look. 

Central Texas oaks and why drought stress is easy to confuse with disease 

Greater Austin yards are full of live oaks and red oaks that homeowners treat as part of the property. Browning after a dry stretch creates a lot of worry. Oak wilt is real in this region, and so is heat and moisture stress that looks ugly and still leaves a recoverable tree. 

Do not treat those two as the same thing because a neighbor story said so. Cutting into an oak at the wrong time, or leaving fresh wounds, is a common fear among people who have already read about how oak wilt can spread. Do not prune just to see, and do not buy a home treatment kit off a search result. 

An honest assessment sometimes comes back as “not oak wilt.” That keeps you from paying for the wrong work and from removing a tree that still has a future. 

When oak wilt worry is a reason to call, not to self-treat 

Call when: 

• Browning is spreading fast 

• You see staining or sudden leaf drop on an oak 

• A nearby oak was recently removed for disease 

Call before you cut, drill, or apply anything you found online. If disease is confirmed, oak wilt treatment is a professional service, not a weekend experiment. If it is not confirmed, you still want a plan for pruning timing so the next cut does not create a new problem. 

When to call for a tree health inspection and what happens on site 

Call after your ground check if you found spreading dieback, trunk or root-flare damage, a new lean, fungus at the base, or oak wilt concern you cannot settle yourself. Call sooner if the tree sits over a roof, play set, or driveway. 

How often should trees be inspected? Public guidance often says large or newly planted trees benefit from a look at least once a year, and that high-use sites may need more frequent checks. Ask the person who walks your property what makes sense for your oaks and your lot. Do not treat a generic interval as a promise that every tree follows the same clock. 

On a typical visit, the crew looks at the crown, trunk, and root zone, talks through what you have noticed, and explains options. Box Tree Care offers free consultations and estimates. Start that conversation at (737) 777-8022 or through boxtreecare.com. 

Questions to ask before anyone recommends removal 

  4. What do you think is going on, and what would change your mind? 

  5. Can the tree be preserved with pruning, treatment, or a wait-and-watch plan? 

  6. How is the crew licensed and insured for work near structures? 

   7. What would you do if this is drought stress rather than disease? 

Homeowners in this area are right to distrust a pitch that only sells removal. You want someone who can assess what is best for the property, including leaving a tree in place when that is the honest call. 

How Box Tree Care can help after your first look 

Box Tree Care is based in Leander and serves the Greater Austin area. The company is owner-led by Joshua Box and offers arborist assessments along with tree trimming, oak wilt treatment, deep root fertilization, and tree removal when an inspection shows that is the safer path. 

The team is licensed and insured, and the business is BBB accredited. If your ground check left you with a list of worries instead of a clear next step, book a tree health inspection and get an on-site read before you cut, treat, or wait through another storm season. 

Call (737) 777-8022 or visit boxtreecare.com for a free consultation. 

About the author   

Joshua Box is the owner of Box Tree Care, a licensed and insured tree service based in Leander, Texas, serving Greater Austin. He leads a local team focused on honest tree assessments, careful pruning and disease work, and leaving properties in good shape for the neighbors who call when a tree looks wrong.