Lawn Care Guide for Clay County
Clay County, Minnesota
Data Story
About Lawn Care in Clay County, Minnesota
Consistent Growing in Western Minnesota
Clay County matches the state average with a lawn difficulty score of 63.2. While the Zone 4a winters are harsh, the growing conditions remain more favorable than the national baseline score of 50.0.
Sunnier Days and Lower Rainfall
The annual precipitation of 25.4 inches is lower than the state's 30.0-inch average, requiring more active irrigation. With 11 extreme heat days and 2,439 growing degree days, the climate supports steady, healthy grass growth.
Superior Soil for Grass
At a pH of 6.89, Clay County soil is nearly perfect for lawn health. The balance of 20.9% clay and 41.7% sand provides a stable, nutrient-rich foundation that most lawn grasses find ideal.
Watch for Dry Surface Soils
Currently, 77.1% of the county is abnormally dry, following 10 weeks of drought in the past year. Since rainfall is naturally lower here, utilizing smart irrigation controllers can help maintain turf without wasting water.
Establish Lawns by Early May
Kentucky Bluegrass is a regional favorite that thrives in this high-quality soil. Aim to plant after May 9 to maximize the growing season before the first frost arrives in early October.
Lawn Difficulty Score
Recommended Grasses
Blue Grama
Bouteloua gracilis
Tall Fescue
Festuca arundinacea
Climate Snapshot
Annual Precip
25.4"
Growing Degree Days
2,438.65
Base 50F
Last Spring Frost
05/09
First Fall Frost
10/03
Days Above 95F
11
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
1.6"
inches of water
Monthly Water
5,048
gallons
Estimated Monthly Cost
$40.39
at $0.008/gallon average
Estimates based on 25" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
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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