Lawn Care Guide for Ransom County
Ransom County, North Dakota
USDA SSURGO / PHZMData Story
About Lawn Care in Ransom County, North Dakota
The Easiest Lawns in the State
Ransom County earns a 58.0 lawn difficulty score, making it one of the easiest places in North Dakota to keep a green yard. This score is significantly higher than the national median of 50.0, though Zone 4a winters still dictate your grass choice.
Plentiful Rain and Growing Days
At 22.9 inches of annual precipitation, Ransom is much wetter than the state average of 19.5 inches. A high 2520 Growing Degree Days provides a long, productive season for turf to establish and thrive.
Balanced Soil for Healthy Roots
The soil composition of 43.7% sand and 19.6% clay offers a great balance of drainage and structure. While the pH of 7.30 is slightly alkaline, it is manageable with standard lawn care practices and proper fertilization.
Reliable Moisture Profile
Only 7 weeks were spent in drought last year, and the county currently faces no moisture deficits. The higher annual rainfall means you can often rely on natural precipitation more than your neighbors to the west.
Capitalize on the Long Season
Take advantage of the May 12th spring start to get your lawn established early. With the first fall frost not expected until October 5th, you have an ideal window for overseeding and winterization.
Lawn Difficulty Score
Top Grass Fit for Ransom County
Excellent match
Jonathan Green Black Beauty Ultra
Jonathan Green
Top cultivar score: 86/100
Zone 4a vs Tall Fescue's 3–8 band.
Soil pH 7.30115023643468 vs Tall Fescue's 5.5–6.5 window.
Precipitation 22.92" + soil AWC vs Tall Fescue's 20–30" need.
Growing-degree-days + frost window vs a intermediate-difficulty establishment.
If you spend any time on lawn care forums, Reddit's r/lawncare, or YouTube lawn channels, one name comes up more than any other: Jonathan Green Black Beauty Ultra. It's practically a cult favorite, and the label, cultivar story, and long-running owner reports explain why. The secret is in the genetics.
In Ransom County, USDA zone 4a, soil pH 7.3, Jonathan Green Black Beauty Ultra 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
22.9"
Growing Degree Days
2,519.5
Base 50F
Last Spring Frost
05/12
First Fall Frost
10/05
Days Above 95F
14
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
1.8"
inches of water
Monthly Water
5,747
gallons
Estimated Monthly Cost
$45.98
at $0.008/gallon average
Estimates based on 23" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Ransom County
Drought Stress
With only 23 inches of annual rainfall, lawns in Ransom County face significant drought stress. Consider drought-tolerant grass species and deep, infrequent watering.
Learn more about regional lawn challenges at The Lawn Report.
Lawn Care Advisory: Ransom County
Lawn Verdict
Ransom County is in USDA hardiness zone 4a, one of the coldest zones in the country. with winter lows reaching around -30.0°F. and 2,519.5 growing degree days, sufficient for most common turfgrasses. Wide seasonal temperature swings (61°F between January and July) stress lawns and favor resilient species. Moderate rainfall (22.9 inches) generally supports healthy lawns with minimal supplemental watering.
Seasonal Breakdown
Wait until after May 12 to seed or overseed; soil temperatures should consistently reach 50-55°F. Cool summers (July averages 71.6°F) reduce heat stress — maintain regular mowing and moderate watering. Aerate and overseed cool-season lawns by early fall, well before October 5; this is the best renovation window. Winters are harsh (January averages 11.0°F); avoid foot traffic on frozen turf and plan snow mold prevention.
Watering Guidance
Low annual precipitation (22.9 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
Ransom County is close to the North Dakota average temperature, it is somewhat wetter than the state average, 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 Ransom County in?
What is the best grass for Ransom County?
How much rainfall does Ransom County get?
What is the soil pH in Ransom 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 Ransom County