Tree Care in St. George, UT

Connect with local trade pros serving St. George and the rest of Washington County.

Tree care in St. George

Trees in St. George grow in extreme heat, little rain and often difficult soil. Keeping them healthy is mostly about water: how much, how deep and what kind.

Heat stress

A reading of 117°F at the St. George cooperative weather station on July 10, 2021 tied Utah's all-time maximum temperature record. In that heat, trees lose water fast. Leaf scorch, browning at leaf edges and dropping leaves in midsummer are signs of heat and drought stress. Trees suited to the desert handle this better than trees from wetter climates. If you're planting, ask an arborist which species do well here.

Watering

Shallow, frequent watering keeps roots near the surface, where they bake. Deep, slower watering encourages roots to grow down. Drip emitters should be spread out under the tree's canopy and moved outward as the tree grows, not left at the trunk. Ask the arborist how much and how often to water your trees.

Soil

The Utah Geological Survey's hazard maps for the St. George–Hurricane area cover caliche, shallow bedrock, expansive soil, gypsiferous soil and wind-blown sand. Caliche is a cemented layer that roots can't easily penetrate, and it can hold water like a bowl, drowning roots below the surface. Ask an arborist or landscaper whether your planting site has caliche, and whether it should be broken up before planting.

Water quality

St. George's water comes from springs and wells in the Navajo Sandstone and Kayenta Formation aquifers and from conservancy district surface water, and the city says most Southern Utah water is hard. Minerals and salts from irrigation can build up in soil over time. Occasional deep watering helps flush salts below the root zone. Softened water contains sodium and isn't good for irrigation; make sure irrigation lines aren't fed through a softener.

Pruning

Good pruning removes dead, weak and crossing branches. Over-thinning exposes bark to sunburn. Topping weakens trees. Ask how the company prunes and avoid any that recommend topping.

Wind

Summer storms bring strong gusts. Trees with weak forks, decay or heavy, overextended limbs are the ones that fail. Have large trees near the house checked.

Before you hire

Ask for proof of liability and workers' compensation insurance and a written estimate that names each tree, the work, stump grinding and cleanup. Ask whether climbers use spikes; they shouldn't on trees you're keeping.

Local facts behind this page

A reading of 117°F at the St. George cooperative weather station on July 10, 2021 tied Utah's all-time maximum temperature record, first set in 1985; the State Climate Extremes Committee accepted it. Source: NOAA NCEI State Climate Extremes Committee, Utah Maximum Temperature report (July 8, 2022)
The Utah Geological Survey's hazard maps for the St. George–Hurricane area cover expansive soil and rock, collapsible soil, gypsiferous soil and rock, caliche, shallow bedrock, wind-blown sand, breccia pipes and paleokarst, soil piping and erosion, and shallow groundwater. The survey describes the area as one of Utah's fastest-growing regions for more than two decades, and notes that as land well suited for development grows scarce, building has moved into less favorable areas. Source: Utah Geological Survey, Geologic-Hazard and Adverse-Construction-Condition Maps for the St. George–Hurricane Area
St. George's drinking water comes from springs and wells in the Navajo Sandstone and Kayenta Formation aquifers of the Virgin River basin, plus surface water bought from the Washington County Water Conservancy District. Source: City of St. George, 2024 Water Quality Report

Sources checked 2026-10-26. Codes, rebates and standards change; the contractor you hire and your local building department have the final word on what applies to your property.

Before you hire in Washington County

Get Tree Care Pros doesn't check contractors' credentials for you, so do it yourself before you sign anything: look the contractor up with DOPL's license lookup, and for plumbing or electrical work check that trade's license too. The Utah Division of Professional Licensing (DOPL) lookup is free: Utah Division of Professional Licensing (DOPL).

Get the scope, price and timeline in writing before work starts.
Ask who pulls any required permit, and whether an inspection is part of the job.
Ask for proof of insurance and for references from recent local jobs, and call them.