Lawn Care Guide for Cass County
Cass County, North Dakota
Data Story
About Lawn Care in Cass County, North Dakota
Cass County’s Favorable Growing Conditions
Cass County earns a lawn difficulty score of 58.2, making it significantly easier to maintain a yard here than the national median of 50.0. While Hardiness Zone 4a poses winter risks, the county remains above the state average score of 54.0.
High Rainfall Compared to State Averages
The county receives 23.6 inches of annual precipitation, which is more than four inches above the North Dakota state average of 19.5 inches. With 2,331 growing degree days and only 10 extreme heat days, you can maintain a consistent mowing schedule with less heat-related dormant periods.
Managing Alkaline Soils for Healthier Grass
The soil features a 21.8% clay and 37.8% sand composition with a pH of 7.31. Since this is above the ideal 6.0-7.0 range, your lawn might benefit from sulfur-based amendments to prevent nutrient lockout.
Moderate Drought Exposure and Water Management
Cass County experienced 7 weeks of drought over the past year, and nearly a third of the area currently remains abnormally dry. Deep watering once per week is more effective than daily light sprinkling for building resilient root systems.
Seeding for Success in Zone 4a
Kentucky Bluegrass and Fine Fescue are the top choices for this cold-hardy region. Plan your seeding projects after the May 10 last frost date or in early fall before the October 1 frost arrives.
Lawn Difficulty Score
Recommended Grasses
Blue Grama
Bouteloua gracilis
Tall Fescue
Festuca arundinacea
Buffalograss
Bouteloua dactyloides
Climate Snapshot
Annual Precip
23.6"
Growing Degree Days
2,330.65
Base 50F
Last Spring Frost
05/10
First Fall Frost
10/01
Days Above 95F
10
Hardiness Zone
4a
Seeding Calendar — Zone 4A
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
1.7"
inches of water
Monthly Water
5,448
gallons
Estimated Monthly Cost
$43.58
at $0.008/gallon average
Estimates based on 24" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Cass County
Drought Stress
With only 24 inches of annual rainfall, lawns in Cass County face significant drought stress. Consider drought-tolerant grass species and deep, infrequent watering.
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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