Why Are My Tree Leaves Turning Yellow? Causes, Treatments, and When to Call an Arborist

One of the most common questions we hear each summer is: "Why are my tree leaves turning yellow?"

If you've noticed yellowing leaves on your trees in Omaha or the surrounding metro area, don't ignore it. While some causes are minor, others can indicate serious stress that should be addressed before long-term damage occurs.

What Is Chlorosis?

One of the most common causes of yellow leaves in eastern Nebraska is a condition called chlorosis. Chlorosis occurs when a tree cannot produce enough chlorophyll, causing leaves to lose their healthy green color. In many cases, the leaf turns yellow while the veins remain green.

Why Does Chlorosis Happen?

Omaha-area soils are often alkaline, making it difficult for trees to absorb certain nutrients, particularly iron. Even if the nutrient is present in the soil, the tree may not be able to access it.

This is especially common in:

• Maple trees

• Oak trees

• River Birch

• Pin Oak

Other Causes of Yellow Leaves

Not all yellow leaves are caused by chlorosis.

Other potential causes include:

Drought Stress

Hot Nebraska summers can place significant stress on trees.

Poor Drainage

Too much water can be just as harmful as too little.

Root Damage

Construction, soil compaction, and grade changes can impact root systems.

Insect or Disease Issues

Some pests and diseases interfere with a tree's ability to transport water and nutrients.

Can Yellow Leaves Be Fixed?

In many cases, yes. The first step is identifying the root cause.

Depending on the issue, solutions may include:

• Iron injections

• Deep root fertilization

• Watering adjustments

• Pest treatments

• Soil improvements

Why Early Action Matters

Trees often show symptoms long before they begin to decline seriously. Addressing yellow leaves early can help prevent larger health problems later. The sooner a diagnosis is made, the more treatment options are typically available.

Schedule a Tree Health Assessment

If your trees are showing yellow leaves, thinning canopies, or other signs of stress, American Arborist can help.

We provide tree health consultations, fertilization, iron injections, treatments, pruning, and removals throughout Omaha, Elkhorn, Bennington, Waterloo, Valley, Gretna, Papillion, La Vista, Ralston, Bellevue, Council Bluffs, Carter Lake, and surrounding communities.

Schedule a free consultation today and let us help determine what's causing your tree's yellow leaves.