Why Are My Ash Tree Leaves Falling Off in Mesa, AZ?
Is your ash tree dropping leaves before you expect it to? Are green leaves collecting underneath the tree, or is the canopy becoming noticeably thinner? Unexpected leaf loss can worry homeowners, especially during Mesa's hot weather. The first step is finding out why it is happening.
Warner at Warner's Tree Surgery has more than 50 years of experience treating sick trees in the Phoenix area. He evaluates the tree, its growing conditions, and its watering before recommending what to do. Call 480-969-8808 to discuss your ash tree.
Watch: Ash Tree Leaves Falling Off in Mesa
Does Leaf Drop Mean My Ash Tree Is Dying?
Not necessarily. Many ash trees naturally lose their leaves during their seasonal dormant period. The timing depends on the type of ash and local weather. However, sudden leaf loss during the growing season, repeated thinning, or leaf loss accompanied by dying branches deserves closer attention.
What Can Cause an Ash Tree to Drop Leaves?
- Heat and drought stress: Extreme temperatures and insufficient available water can cause an ash tree to shed leaves.
- Watering and drainage problems: Dry soil, uneven irrigation, or soil that stays excessively wet can stress roots. Leaf loss alone does not tell you whether the tree needs more water.
- Root disturbance: Recent digging, construction, soil compaction, or landscape changes may affect the tree's ability to take up water.
- Insects or disease: These are possible causes, but an inspection is needed before choosing a treatment.
- Seasonal changes: Normal seasonal shedding should be considered before assuming the tree is sick.
What Should You Check First?
Notice when the leaf drop started and whether the fallen leaves are green, yellow, brown, or spotted. Look at whether the entire canopy is thinning or only one section is affected. Take photographs of the whole tree and several fallen leaves.
Check that irrigation equipment is working and that water reaches a broad area of the root zone rather than only the soil beside the trunk. Soil moisture below the surface matters more than whether the top looks dry. Watering needs vary with tree size, soil, drainage, and weather.
Avoid automatically adding fertilizer, applying pesticides, or increasing watering every day. The appropriate response depends on the cause of the leaf loss.
How Warner Evaluates an Ash Tree Losing Leaves
Warner looks at the remaining foliage, canopy density, branches, trunk, and visible root area. He asks about watering, recent landscape work, and when the symptoms began. These details help him decide whether changes in care, further diagnosis, or a specific treatment may be appropriate.
Some stressed trees can improve when the underlying problem is corrected. Recovery depends on the cause and how much damage has already occurred. No treatment can guarantee that every declining ash tree will recover.
When Should You Call for Help?
Arrange an evaluation if your ash tree suddenly loses many leaves during the growing season, repeatedly develops a thin canopy, or has leaf loss together with dead branches or bark damage. Keep people and pets away from hanging or broken limbs until they can be assessed.
Ash Tree Help in Mesa and Nearby Communities
For help with an ash tree losing leaves in Mesa, Gilbert, Chandler, Tempe, or Scottsdale, contact Warner's Tree Surgery. Call to confirm availability for your location.
Call Warner's Tree Surgery: 480-969-8808