Lawn Care Guide for McPherson County
McPherson County, South Dakota
Data Story
About Lawn Care in McPherson County, South Dakota
Healthy Lawns in a Cooler Climate
McPherson County earns a respectable 55.4 lawn difficulty score, outperforming the state average of 51.1. Though it sits in the colder Hardiness Zone 4b, the lack of extreme heat simplifies care for cool-season grasses.
Short Growing Season, Less Stress
The county sees only 13 extreme heat days per year, which prevents the grass from burning out in mid-summer. However, with only 21.2 inches of annual rainfall, you will need to supplement water to keep the lawn green through the 2,209 growing degree days.
Sandy Soil Requires Nutrition
A high sand content of 37.6% means your soil drains quickly, which can wash away nutrients. Maintaining a pH of 7.10 is easy, but you may need to fertilize more frequently than in counties with heavier, clay-rich soil.
Resilient and Currently Hydrated
With only 12 weeks of drought in the past year and zero percent of the county currently in dry status, conditions are prime for growth. This is an ideal time to repair any thin spots while the natural moisture levels are high.
Beating the Early Frost
The growing window is tight here, with the first fall frost arriving as early as September 28. Plan to have all seeding completed shortly after the May 10 spring frost to give your grass enough time to mature before the winter freeze.
Lawn Difficulty Score
Recommended Grasses
Blue Grama
Bouteloua gracilis
Tall Fescue
Festuca arundinacea
Buffalograss
Bouteloua dactyloides
Climate Snapshot
Annual Precip
21.2"
Growing Degree Days
2,208.967
Base 50F
Last Spring Frost
05/10
First Fall Frost
09/28
Days Above 95F
13
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
1.9"
inches of water
Monthly Water
6,042
gallons
Estimated Monthly Cost
$48.34
at $0.008/gallon average
Estimates based on 21" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in McPherson County
Drought Stress
With only 21 inches of annual rainfall, lawns in McPherson 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.
Explore more data for McPherson County