We have been treating all types of sick trees for over 50 year

Welcome to Warner’s Tree Surgery, Mesa’s Top Tree Care Service. With over half a century of experience, I specialize in diagnosing and treating a wide range of tree diseases.

Is Your Ash Tree Sick Or Dying?

Watch this short video first. Then select the symptom that best matches your Ash tree.

Find The Symptom That Matches Your Ash Tree

Leaf Problems

Branch Problems

Bark And Trunk Problems

Growth Problems

Root Problems

Why Ash Trees Decline In Arizona

Ash trees are among the most popular shade trees in Arizona. Unfortunately, watering problems, root damage, soil compaction, heat stress, insect activity, disease, and environmental changes can all contribute to declining tree health.

Because many Ash tree problems create similar symptoms, proper diagnosis is often more important than guessing at the cause.

AI Help For Trees

Download Warner's free Ash Tree Care Guide to learn about watering, fertilization, root health, common Ash tree problems, and treatment options for Arizona Ash trees.

Download The Free Ash Tree Care Guide

Still Concerned About Your Ash Tree?

Warner's Tree Surgery has been diagnosing and treating sick Ash trees throughout Mesa, Gilbert, Chandler, Tempe, Scottsdale, Phoenix, Paradise Valley, Fountain Hills, Queen Creek, Apache Junction, and nearby Arizona communities for more than 50 years.

If your Ash tree is showing yellow leaves, brown leaves, dead branches, bark damage, thinning foliage, poor growth, mushrooms, exposed roots, or other signs of decline, professional diagnosis may help identify the cause before serious damage occurs.

Call Warner's Tree Surgery at 480-969-8808.

Citrus Tree Problems in Arizona

Citrus trees in Arizona are struggling due to several insect infestations. I can control most of the harmful ones, but a few pests will eventually kill citrus trees over time.

Watch the video and download the help sheet below to get started on saving your citrus trees.

Learn More

If you want to understand these issues better and protect your trees from diseases, watch the video.

Understanding Yellow Palo Verde Issues

Yellowing in Palo Verdes is commonly caused by root rot or the Palo Verde Root Borer. Signs include holes at the base of the tree, sawdust-like frass, and thinning canopy.

What to Do

Watch the video, and have me come out to get you started on protecting your Palo Verdes.

Pine Tree Diseases

Pine trees provide shade, wind protection, and beauty, but they can suffer from several diseases that affect their health and appearance.

In this video, you’ll learn how to recognize symptoms of common pine problems such as tip blight, root rot, and aphid infestations, and how to manage them effectively.

Keeping Your Pines Healthy

You’ll also get tips on preventing these diseases by giving your pine trees the proper care they need.

Whether you’re a homeowner, landscaper, or tree enthusiast, this video will help you keep your pine trees healthy and beautiful in Mesa, Gilbert, Sun Lakes, Tempe, Chandler, and Scottsdale.

Queen Palm Tree Diseases

This video explains how to prevent and treat common Queen Palm problems in Arizona, including frizzle top and fusarium wilt.

Important Nutrient Warning

Queen Palms rely almost entirely on manganese — and a small amount of boron — for their immune system. Arizona soil contains no natural manganese, and regular palm spikes do not provide enough. This is why many Queen Palms decline even when people think they are fertilizing correctly.

Watch the video to learn the correct treatment plan and keep your Queen Palms healthy.

Click here to order the Ultra Tree Spikes For The Boron

NASA Discovers Microbes in the Sky

In this video, I explain NASA’s recent discovery of microbes living high in the atmosphere. These airborne pathogens can travel around the world, influence how raindrops form, and may introduce new diseases to trees and other plants.

How Rain Makes Trees Sick

These microbes can be carried down by rain, spreading germs from the upper atmosphere into our soil and onto our trees. Watch the video to learn how this process works and what it may mean for tree health in the future.

How Herbs and Trees Fight Disease

In this video, Pat from Warner’s Tree Surgery explains how herbs and trees use enzymes to fight disease, and how those enzymes are created from nutrients in the soil.

Improving Plant and Soil Health

Pat also shares tips on using herbs for your own health and on improving soil quality so your trees and plants can produce the enzymes they need to stay strong.

Chemical Burns in Trees

Chemical burns occur when excess ions around the roots reverse the root membrane, forcing water out of the tree. This leads to leaf burn, wilting, and decline.

Common Causes

Toxic substances in the soil
Tool or paint-cleaner runoff
Drain cleaners (Drano)
Gas leaks
Insecticide spills
Pool salt or chlorine
Excess fertilizer
Contaminated fill dirt

Treatment

Flood the tree heavily for two weeks to push the chemical deeper into the soil. New buds often appear within 1–2 weeks. Severe cases may require direct trunk injections to bypass damaged roots and boost the tree’s immune system.

After watering for two weeks, leave the tree alone for a year. If leaf problems return, have the tree re‑evaluated.