Lawn Care Guide for Mountrail County
Mountrail County, North Dakota
USDA SSURGO / PHZMData Story
About Lawn Care in Mountrail County, North Dakota
Cooler Climates in Mountrail
Mountrail County has a lawn difficulty score of 46.0, indicating a tougher-than-average environment for turf. The Hardiness Zone 4a classification reflects the cold northern climate that limits the variety of grasses that can survive.
Short Growing Seasons and Low Heat
With only 10 extreme heat days and 1,768 growing degree days, grass grows slower here than in southern North Dakota. Annual precipitation of 18.0 inches means you will still need to water regularly despite the cooler average temperatures.
Alkaline Soil with High Clay
The soil pH of 7.10 is slightly alkaline, and the 22.4% clay content is among the highest in the region. This higher clay percentage helps retain moisture but can lead to compaction, so regular aeration is recommended.
Battling Extensive Drought Periods
Mountrail County experienced 22 weeks of drought over the past year. Because clay soils can bake hard during these periods, using a soaking hose can be more effective than a traditional sprinkler for getting water to the roots.
Maximize the Growing Window
Select the most cold-tolerant Fine Fescues to handle the short season. Your target dates for planting are after the May 17 last frost, with a goal to be well-rooted before the first frost on September 23.
Lawn Difficulty Score
Top Grass Fit for Mountrail County
Strong match
Pennington Smart Seed Sun & Shade
Pennington
Top cultivar score: 78/100
Estimated — county soil data incomplete.
Zone 4a vs Tall Fescue's 3–8 band.
Soil pH 7.09875005062477 vs Tall Fescue's 5.5–6.5 window.
Precipitation 18.020000000000003" + 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 Mountrail County, USDA zone 4a, soil pH 7.1, Pennington Smart Seed Sun & Shade scores 78/100 — a strong zone match, adequate moisture, and a workable 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
Best Grass Seed for Mountrail County
Zone 4a • Cool-season grasses thrive here.
Find Seeds for Zone 4aClimate Snapshot
Annual Precip
18.0"
Growing Degree Days
1,767.5
Base 50F
Last Spring Frost
05/17
First Fall Frost
09/23
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
2.1"
inches of water
Monthly Water
6,583
gallons
Estimated Monthly Cost
$52.66
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 Mountrail County
Drought Stress
With only 18 inches of annual rainfall, lawns in Mountrail County face significant drought stress. Consider drought-tolerant grass species and deep, infrequent watering.
Persistent Drought Conditions
Mountrail 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: Mountrail County
Lawn Verdict
Mountrail 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 1,767.5 growing degree days favor cool-season varieties like Kentucky bluegrass and fescue. Low rainfall (18.0 inches) means supplemental irrigation is essential during summer months.
Seasonal Breakdown
Wait until after May 17 to seed or overseed; soil temperatures should consistently reach 50-55°F. Cool summers (July averages 66.8°F) reduce heat stress — maintain regular mowing and moderate watering. Aerate and overseed cool-season lawns by early fall, well before September 23; this is the best renovation window. Winters are harsh (January averages 8.4°F); avoid foot traffic on frozen turf and plan snow mold prevention.
Watering Guidance
Low annual precipitation (18.0 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
Mountrail 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 Mountrail County in?
What is the best grass for Mountrail County?
How much rainfall does Mountrail County get?
What is the soil pH in Mountrail 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 Mountrail County