Lawn Care Guide for Crook County
Crook County, Wyoming
USDA SSURGO / PHZMData Story
About Lawn Care in Crook County, Wyoming
Wyoming's Premier Spot for Green Grass
Crook County stands out with a lawn difficulty score of 54.2, surpassing both the state average and the national median of 50.0. This region in hardiness zone 4b is remarkably well-suited for lawn care compared to its neighbors.
Abundant Rain and Manageable Heat
At 20.2 inches of annual precipitation, Crook County is the wettest in this group, providing a much stronger natural foundation for grass. With only 22 extreme heat days and 2055 growing degree days, the climate is ideal for maintaining lush, cool-season turf.
Naturally Balanced Soil Foundation
The soil features a near-perfect pH of 6.79, sitting right in the ideal range for grass growth. With a composition of 21.2% clay and 34.1% sand, the soil offers a balanced structure that retains moisture while allowing for proper root respiration.
Resilient Through the Dry Months
The county experienced only 12 weeks of drought last year, and currently has zero area in severe drought status. This relative moisture means you can focus on maintenance rather than survival, though deep watering during the 22 heat days remains a best practice.
Optimal Growth in the Black Hills
Fine Fescues and Kentucky Bluegrass thrive here, benefiting from the superior soil and rain levels. Plant your seeds after the May 22nd frost to take full advantage of the best growing conditions found anywhere in the state.
Lawn Difficulty Score
Top Grass Fit for Crook County
Excellent match
Pennington Smart Seed Sun & Shade
Pennington
Top cultivar score: 92/100
Estimated — county soil data incomplete.
Zone 4b vs Tall Fescue's 3–8 band.
Soil pH 6.78574781211483 vs Tall Fescue's 5.5–6.5 window.
Precipitation 20.248" + 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 Crook County, USDA zone 4b, soil pH 6.8, Pennington Smart Seed Sun & Shade scores 92/100 — 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 4b is below Pennington Zenith Zoysia Grass Seed & Mulch's effective range (5–10); not recommended for this county.
- Scotts Turf Builder Bermudagrass — USDA zone 4b 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
Climate Snapshot
Annual Precip
20.2"
Growing Degree Days
2,055.417
Base 50F
Last Spring Frost
05/22
First Fall Frost
09/25
Days Above 95F
22
Hardiness Zone
4b
Seeding Calendar — Zone 4B
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
2.0"
inches of water
Monthly Water
6,256
gallons
Estimated Monthly Cost
$50.05
at $0.008/gallon average
Estimates based on 20" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Crook County
Drought Stress
With only 20 inches of annual rainfall, lawns in Crook 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: Crook County
Lawn Verdict
Crook County is in USDA hardiness zone 4b, one of the coldest zones in the country. with winter lows reaching around -25.0°F. though only 2,055.417 growing degree days favor cool-season varieties like Kentucky bluegrass and fescue. Moderate rainfall (20.2 inches) generally supports healthy lawns with minimal supplemental watering.
Seasonal Breakdown
Wait until after May 22 to seed or overseed; soil temperatures should consistently reach 50-55°F. Cool summers (July averages 69.6°F) reduce heat stress — maintain regular mowing and moderate watering. Aerate and overseed cool-season lawns by early fall, well before September 25; this is the best renovation window. Cool winters (January averages 22.6°F) mean slow or dormant growth; keep debris off the lawn.
Watering Guidance
Low annual precipitation (20.2 inches) makes irrigation essential for maintaining green turf through summer. Currently, 100.0% of the county is in abnormally dry according to the US Drought Monitor. Cool summers reduce water demand; overwatering is a bigger risk than drought stress.
Regional Context
Crook County is close to the Wyoming average temperature, it is somewhat wetter than the state average, USDA zone 4b 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 Crook County in?
What is the best grass for Crook County?
How much rainfall does Crook County get?
What is the soil pH in Crook 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 Crook County