Sick Tree Diagnosis and Treatment Services in Dallas-Fort Worth

Trees communicate problems through visible symptoms.

These symptoms provide important clues regarding the tree’s overall condition, but they do not always reveal the true cause of decline.

Common warning signs include:

Many different problems can produce similar symptoms, which is why professional diagnosis is so important.

One of the most common mistakes homeowners make is assuming they know what is wrong with a tree based solely on appearance.

A tree with yellow leaves may be suffering from nutrient deficiencies, root damage, insect activity, disease pressure, drought stress, or poor soil conditions.

Similarly, canopy thinning may indicate root problems, vascular diseases, construction impacts, environmental stress, or chronic pest infestations.

Accurate diagnosis helps eliminate guesswork and allows treatments to focus on the actual problem.

Every treatment program begins with diagnosis.

Recommendations may include:

The objective is to reduce stress while supporting the tree’s natural defense systems and recovery processes.

The systematic approach

"My tree looks bad" — the homeowner's starting point. Our arborist works through a structured differential diagnosis to identify what's actually wrong. The framework: species → symptom pattern → distribution → timing → site context → recent changes. Each layer narrows the possibilities until one diagnosis fits all the evidence.

Symptom pattern recognition

Yellow leaves with green veins (interveinal chlorosis) on a red oak in alkaline DFW soil → almost always iron chlorosis. Marginal leaf browning with a yellow halo in late summer on a mature red oak → bacterial leaf scorch. Sudden mid-season wilting on one branch of a red oak → oak wilt requiring immediate attention. Spotted or blotched leaves on a sycamore in spring → anthracnose. Diffuse uniform yellowing across the entire canopy → often nitrogen deficiency or root issue.

Distribution diagnosis

Whole canopy uniformly affected suggests root or vascular problems. Localized to a single branch or sector suggests vascular pathogens or branch-specific injury. Worst on the south or west side suggests heat and drought stress. Worst on the north or downhill side suggests excess moisture or root rot. Symptoms starting at the top and working down suggests vascular blockage. Symptoms starting at the bottom suggests trunk or root damage.

Trunk and root flare inspection

We sound the trunk with a rubber mallet at 6-inch intervals for hidden decay. We examine the bark for cracks, cankers, fruiting bodies (mushrooms or conks always indicate decay), insect frass, exit holes, and oozing. We check the root flare exposure (buried root flares are diagnostic in themselves). We look for girdling roots that strangle vascular tissue.

Soil and site context

We probe the soil under the dripline for compaction (the probe should slide in 6+ inches with moderate resistance) and moisture. We ask about recent changes: grade alterations, new patios or driveways, herbicide applications, irrigation changes, new construction within the root zone. Many sick-tree calls trace to a change made months or years earlier.

Lab confirmation when warranted

For ambiguous cases, we submit samples to the Texas Plant Disease Diagnostic Laboratory (TPDDL) at Texas A&M. Standard turnaround 5-10 business days. Lab work is the standard for oak wilt confirmation, bacterial pathogen identification, and any unfamiliar fungal disease.

The treatment decision

Once we have a confirmed diagnosis, we present 1-3 options with honest trade-offs and pricing. About 30% of our sick-tree visits in DFW end with us telling the homeowner the issue is non-fatal and the tree will recover with no intervention. That's the answer that earns trust.