How to Keep Trees Healthy During Utah’s Hot, Dry Summers

Utah’s hot temperatures, intense sunlight, low humidity, and limited summer rainfall can place significant stress on landscape trees. The most important part of summer tree care in Utah is providing slow, deep irrigation while protecting the soil and roots from excessive heat, compaction, and competition.

With consistent care and early problem detection, homeowners can help both mature and newly planted trees remain healthier throughout the hottest months of the year.

Water Trees Slowly and Deeply

Trees should be watered differently from lawns, flowers, and other shallow-rooted plants. Short, frequent sprinkler cycles may wet only the top few inches of soil, which can encourage shallow roots and make trees more vulnerable to drought and wind.

Instead, apply water slowly enough to reach the deeper root zone. Utah State University Extension recommends watering trees and shrubs to a soil depth of approximately 18 to 20 inches. Soaker hoses, drip irrigation, or a slowly running hose can help water penetrate the soil instead of running across the surface.

Water beneath the tree’s canopy and across the surrounding root zone rather than placing water directly against the trunk. Additionally, avoid positioning drip emitters too close to the trunk, where constant moisture may contribute to disease.

Check the Soil Before Watering Again

There is no single watering schedule that works for every tree. The correct frequency depends on the tree’s size, age, species, soil type, exposure, and recent weather.

Before turning on the irrigation system, check the soil several inches below the surface. A long screwdriver, soil probe, or narrow trowel can help you determine whether the deeper soil is still moist. A probe will move through moist soil more easily and stop when it reaches dry ground.

Sandy soil absorbs water quickly but may dry out faster. In contrast, Utah’s heavier clay soils absorb water more slowly and may require several shorter cycles to prevent runoff. Therefore, homeowners should adjust irrigation according to their property rather than relying only on a preset schedule.

Give Newly Planted Trees Extra Attention

Newly planted trees are especially vulnerable during Utah’s hot, dry summers because their roots have not yet expanded into the surrounding soil.

Check the original root ball and nearby soil regularly during the first few growing seasons. The soil should remain evenly moist but should not stay saturated. Too little water may cause wilt, brown leaf margins, and premature leaf drop. However, too much water can damage roots and create similar symptoms, including yellowing, canopy decline, and leaf loss.

Summer planting is possible, but heat and active growth make proper aftercare particularly important. Whenever practical, spring or fall planting gives many Utah trees cooler conditions in which to begin establishing roots.

Use Mulch to Protect Tree Roots

Adding organic mulch around a tree is one of the simplest ways to support summer tree care in Utah. Mulch helps moderate soil temperatures, reduce evaporation, limit weeds, decrease soil compaction, and protect trunks from lawn equipment.

Apply roughly two to four inches of wood chips or another coarse organic mulch over a broad area around the tree. Wider mulch beds are generally more beneficial than small rings because tree roots spread well beyond the trunk.

However, keep the mulch several inches away from the bark. Do not pile it against the tree in a volcano shape. Mulch touching the trunk can trap moisture and contribute to bark or trunk problems.

Grass growing around the base also competes with trees for water and nutrients. Replacing some turf with mulch can reduce that competition and make irrigation more effective.

Recognize Signs of Summer Tree Stress

Trees often show visible warning signs when their roots cannot supply enough water to the canopy. Common drought and heat-stress symptoms include:

• Wilting, folding, or curling leaves
• Brown or crispy leaf margins
• Yellowing foliage
• Premature leaf drop
• Reduced new growth
• Thinning or dieback in the canopy
• Early needle loss on conifers

Brown leaf edges are frequently associated with leaf scorch. Utah State University Extension explains that scorch may be caused by drought, underwatering, intense sunlight, heat, wind, compacted soil, or restricted roots. Utah’s low humidity and intense summer sun can make scorch particularly noticeable by late summer.

Do not assume every brown or yellow leaf means the tree needs more water. Overwatering, iron chlorosis, insects, diseases, and root problems can create similar symptoms. When the cause is uncertain, a professional tree health consultation can help prevent an incorrect treatment from making the problem worse.

Avoid Major Pruning During Extreme Heat

Minor pruning may be necessary to remove broken, dead, or hazardous branches. However, major structural pruning is generally best completed during late winter or early spring while many trees are dormant.

Removing too much healthy canopy during extreme heat can place additional stress on the tree. Therefore, summer pruning should usually focus on safety concerns and damaged branches rather than aggressive thinning.

Homeowners should also avoid attempting to remove large limbs, branches near power lines, or sections positioned above homes and other structures. Peterson Tree Care provides professional tree trimming, high-risk removal, power-line clearing, tree health consultations, and 24-hour emergency and storm services throughout Utah County.

Protect the Trunk and Root Zone

Tree roots need oxygen, moisture, and uncompacted soil. Avoid driving, parking, storing construction materials, or repeatedly walking over the soil beneath important trees.

Additionally, protect trunks from lawn mowers and string trimmers. Repeated damage around the base can interfere with the tissues that carry water and nutrients through the tree.

During construction or landscaping projects, keep excavation, soil changes, and heavy equipment away from the root zone whenever possible. Root damage may not become visible until months or even years later.

Frequently Asked Questions About Summer Tree Care in Utah

How often should trees be watered during a Utah summer?

The proper schedule depends on the tree, soil, weather, and irrigation method. Check moisture beneath the surface and water deeply when the root zone begins to dry rather than relying on frequent, shallow watering.

What is the best time to water trees?

Early morning is usually ideal because temperatures are cooler and less water is lost to evaporation. More importantly, water slowly enough to reach the deeper roots.

Should I fertilize a heat-stressed tree?

Do not automatically fertilize a tree showing signs of stress. Fertilizer may encourage new growth that requires additional water. First, identify the cause of the problem and correct irrigation or site conditions when needed.

When should I contact an arborist?

Schedule an evaluation if you notice major dead branches, rapid canopy thinning, cracks, decay, leaning, repeated leaf scorch, storm damage, or symptoms that continue despite appropriate watering.

Schedule a Tree Health Consultation in Utah County

Proper watering, mulch, careful pruning, and early problem detection can help trees withstand Utah’s demanding summers. However, every property and tree is different.

Peterson Tree Care provides tree trimming, removal, stump grinding, fruit-tree pruning, tree health consultations, and emergency tree services for residential, commercial, and municipal properties. The company has certified arborists and more than 30 years of experience in local arboriculture.

Contact Peterson Tree Care at 801-224-TREE (8733) to request a free estimate and professional guidance for healthier, safer trees.