Lawn Care Guide for Summit County
Summit County, Utah
Data Story
About Lawn Care in Summit County, Utah
Mountain Lawns in Summit County
Summit County presents a difficult environment for traditional lawns with a difficulty score of 27.2. This is slightly below the Utah state average and far more challenging than the national average of 50.0. In Zone 5b, the focus shifts from managing heat to surviving long, cold winters and a short growing window.
High Precipitation and Cool Summers
Lawns benefit from 18.0 inches of annual precipitation, which is well above the Utah state average of 13.7. Extreme heat is rare, with only 19 days per year reaching 90°F, significantly lower than the state's 43-day average. Low growing degree days (1675) mean grass grows slowly, requiring less frequent mowing than in the valleys.
Managing High-Altitude Soil Health
Specific soil data for Summit County is currently limited, so local testing is the best way to determine your lawn's needs. Mountain soils can often be rocky or shallow, which impacts how well they hold water and nutrients. Identifying your specific soil texture will help you choose the right fertilization and aeration schedule.
Navigating Severe Mountain Drought
While 41 weeks of drought were recorded last year, 67.4% of the county currently faces severe (D2+) drought conditions. All residents are living in abnormally dry conditions, requiring careful management of mountain water resources. Using drought-tolerant fine fescues can help your lawn thrive with less supplemental irrigation.
Wait for the Early June Thaw
Your primary growing window opens after the last frost on June 7 and closes quickly by September 18. Hardiness Zone 5b is perfect for fine fescues and Kentucky bluegrass, which can handle the deep snow and cold. Seeding should occur early in the summer to ensure roots are established before the mid-September frost.
Lawn Difficulty Score
Recommended Grasses
Buffalograss
Bouteloua dactyloides
Blue Grama
Bouteloua gracilis
Tall Fescue
Festuca arundinacea
Climate Snapshot
Annual Precip
18.0"
Growing Degree Days
1,675.3
Base 50F
Last Spring Frost
06/07
First Fall Frost
09/18
Days Above 95F
19
Hardiness Zone
5b
Seeding Calendar — Zone 5B
Seasonal Lawn Care Checklist
Spring
- Apply pre-emergent herbicide when soil reaches 55F
- Overseed bare spots once frost risk passes
- Start irrigation if rainfall is below 1 inch/week
- Soil test every 2-3 years — adjust lime or sulfur as needed
Summer
- Mow at recommended height weekly
- Water deeply 1-2 times per week (1 inch total)
- Avoid fertilizing cool-season grasses in peak heat
- Scout for grubs and treat if >10 per sq ft
Fall
- Core aerate compacted areas
- Apply fall fertilizer (highest N application for cool-season)
- Continue mowing until growth stops
- Rake or mulch leaves to prevent smothering
Winter
- Avoid walking on frozen turf
- Service mower and sharpen blades
- Plan spring soil amendments based on fall test
- Keep lawn clear of debris
Watering Deficit Calculator
Monthly Deficit
2.1"
inches of water
Monthly Water
6,570
gallons
Estimated Monthly Cost
$52.56
at $0.008/gallon average
Estimates based on 18" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Summit County
Drought Stress
With only 18 inches of annual rainfall, lawns in Summit County face significant drought stress. Consider drought-tolerant grass species and deep, infrequent watering.
Persistent Drought Conditions
Summit County experienced drought conditions for 41 of the past 52 weeks. Prioritize water-efficient grasses and consider reducing lawn area.
Learn more about regional lawn challenges at The Lawn Report.
Want detailed soil composition, drainage classes, and soil series data? View soil details on SoilByCounty.com
Data sourced from USDA SSURGO, NOAA Climate Normals (1991-2020), USDA Plant Hardiness Zone Map, and US Drought Monitor. Lawn difficulty scores and grass recommendations are estimates for informational purposes only.
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