Lawn Care Guide for Clark County
Clark County, South Dakota
Data Story
About Lawn Care in Clark County, South Dakota
Ideal Turf Conditions in Clark County
Clark County is a standout for lawn care with an impressive difficulty score of 57.1, far exceeding the state average of 51.1. The Zone 4b climate here provides a temperate environment that is much friendlier to grass than the national norm.
Cooler Summers and Steady Rainfall
With only 9 extreme heat days per year, Clark County avoids the scorching temperatures that stress most South Dakota lawns. The 23.2 inches of annual precipitation is slightly above the state average, reducing the need for constant supplemental watering.
Consistent Silt and Clay Profiles
The soil pH of 7.14 is common for the region and easily managed with standard fertilization. A composition of 23.8% clay and 33.8% sand helps the ground hold onto moisture without becoming waterlogged, supporting healthy turf density.
High Resistance to Dry Spells
Only 35.3% of the county is currently abnormally dry, a much better status than many southern counties. While 17 weeks were spent in drought last year, the low heat days significantly help the grass survive these periods without heavy damage.
Maximize the Glacial Lakes Season
Hardy cool-season grasses thrive here, with the last spring frost typically landing on May 5. The long fall window, extending until October 5, is the perfect time for aeration and overseeding to maintain that high-performing lawn.
Lawn Difficulty Score
Recommended Grasses
Blue Grama
Bouteloua gracilis
Tall Fescue
Festuca arundinacea
Buffalograss
Bouteloua dactyloides
Climate Snapshot
Annual Precip
23.2"
Growing Degree Days
2,401.5
Base 50F
Last Spring Frost
05/05
First Fall Frost
10/05
Days Above 95F
9
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
1.8"
inches of water
Monthly Water
5,647
gallons
Estimated Monthly Cost
$45.18
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 Clark County
Drought Stress
With only 23 inches of annual rainfall, lawns in Clark County face significant drought stress. Consider drought-tolerant grass species and deep, infrequent watering.
Learn more about regional lawn challenges at The Lawn Report.
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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