Lawn Care Guide for McLean County
McLean County, North Dakota
USDA SSURGO / PHZMData Story
About Lawn Care in McLean County, North Dakota
Managing the Mid-Range in McLean
McLean County scores a 46.9 for lawn difficulty, indicating a climate that is more demanding than the national average. Gardeners in this Hardiness Zone 4a region must balance a short growing season with the need for winter protection.
Steady Heat and Low Rain
The county sees 13 extreme heat days annually, exactly matching the state average, but struggles with a low 18.1 inches of rain. With 2,116 growing degree days, the environment supports growth only if supplemental water is provided regularly.
Consistent Silt and Clay Mix
With a pH of 7.12, the soil is nearly neutral but leans toward alkaline. The balance of 40.8% sand and 21.1% clay provides a stable structure, though adding compost can help buffer the pH and improve nutrient availability.
Overcoming Prolonged Dry Periods
McLean County spent 22 weeks in drought over the last year, necessitating a smart approach to water usage. Mulching lawn clippings back into the turf is a great way to retain soil moisture during these frequent dry stretches.
Start Early in McLean
Kentucky Bluegrass is a regional favorite that handles the 4a winters well. Be ready to seed shortly after the May 12 last frost to ensure the roots are established before the September 30 first frost.
Lawn Difficulty Score
Top Grass Fit for McLean County
Excellent match
Pennington Smart Seed Sun & Shade
Pennington
Top cultivar score: 86/100
Estimated — county soil data incomplete.
Zone 4a vs Tall Fescue's 3–8 band.
Soil pH 7.11899359815406 vs Tall Fescue's 5.5–6.5 window.
Precipitation 18.10166666666667" + soil AWC vs Tall Fescue's 20–30" need.
Growing-degree-days + frost window vs a beginner-difficulty establishment.
Pennington Smart Seed Sun & Shade is the best value in the cool-season grass seed market. Period. You get a quality fescue/KBG blend with genuine drought tolerance coating at a price point significantly below premium options like BBU or Barenbrug RTF.
In McLean County, USDA zone 4a, soil pH 7.1, Pennington Smart Seed Sun & Shade scores 86/100 — a strong zone match, adequate moisture, and a long enough establishment window.
Why we ruled these out
- Pennington Zenith Zoysia Grass Seed & Mulch — USDA zone 4a is below Pennington Zenith Zoysia Grass Seed & Mulch's effective range (5–10); not recommended for this county.
- Scotts Turf Builder Bermudagrass — USDA zone 4a is below Scotts Turf Builder Bermudagrass's effective range (6–11); not recommended for this county.
See our fit-score methodology for how survivability is determined.
Recommended Grasses
Blue Grama
Bouteloua gracilis
Tall Fescue
Festuca arundinacea
Buffalograss
Bouteloua dactyloides
Climate Snapshot
Annual Precip
18.1"
Growing Degree Days
2,116.075
Base 50F
Last Spring Frost
05/12
First Fall Frost
09/30
Days Above 95F
13
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
2.2"
inches of water
Monthly Water
6,792
gallons
Estimated Monthly Cost
$54.34
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 McLean County
Drought Stress
With only 18 inches of annual rainfall, lawns in McLean County face significant drought stress. Consider drought-tolerant grass species and deep, infrequent watering.
Persistent Drought Conditions
McLean County experienced drought conditions for 22 of the past 52 weeks. Prioritize water-efficient grasses and consider reducing lawn area.
Learn more about regional lawn challenges at The Lawn Report.
Lawn Care Advisory: McLean County
Lawn Verdict
McLean County is in USDA hardiness zone 4a, one of the coldest zones in the country. with winter lows reaching around -30.0°F. though only 2,116.075 growing degree days favor cool-season varieties like Kentucky bluegrass and fescue. Low rainfall (18.1 inches) means supplemental irrigation is essential during summer months.
Seasonal Breakdown
Wait until after May 12 to seed or overseed; soil temperatures should consistently reach 50-55°F. Cool summers (July averages 69.3°F) reduce heat stress — maintain regular mowing and moderate watering. Aerate and overseed cool-season lawns by early fall, well before September 30; this is the best renovation window. Winters are harsh (January averages 10.6°F); avoid foot traffic on frozen turf and plan snow mold prevention.
Watering Guidance
Low annual precipitation (18.1 inches) makes irrigation essential for maintaining green turf through summer. The county is currently free of drought conditions. Cool summers reduce water demand; overwatering is a bigger risk than drought stress.
Regional Context
McLean County is close to the North Dakota average temperature, USDA zone 4a helps guide grass selection compared to neighboring counties.
Want detailed soil composition, drainage classes, and soil series data? View soil details on SoilByCounty.com
Frequently Asked Questions
What USDA hardiness zone is McLean County in?
What is the best grass for McLean County?
How much rainfall does McLean County get?
What is the soil pH in McLean County?
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.
Explore more data for McLean County