Lawn Care Guide for Scott County
Scott County, Illinois
Data Story
About Lawn Care in Scott County, Illinois
Resilient Growing Conditions in Scott County
Scott County holds a lawn difficulty score of 72.8, placing it well above the national average for ease of maintenance. Lawns in this Zone 6a region generally thrive, though they face slightly more heat stress than their neighbors to the north.
Substantial Heat During the Growing Season
With 34 extreme heat days per year, Scott County is warmer than the state average of 27. Annual precipitation is healthy at 40.4 inches, which helps offset the moisture loss from the 3,673 growing degree days.
Sandy Texture Improves Local Drainage
The soil pH of 6.52 is ideal for home lawns. Unlike many neighboring counties, Scott has a higher sand content of 26.7%, which improves drainage and prevents the 19.2% clay from becoming too waterlogged.
Severe Drought Affects Most Lawns
Severe Drought (D2+) currently covers 91.8% of the county after a year featuring 30 weeks of drought. During these periods, let your grass grow taller to shade the soil and reduce water evaporation.
Maximize the Season Between Frosts
April 18 marks the typical last frost, opening the window for spring lawn projects. Ensure your lawn is healthy and fed before the first fall frost settles in around October 20.
Lawn Difficulty Score
Recommended Grasses
Tall Fescue
Festuca arundinacea
Climate Snapshot
Annual Precip
40.4"
Growing Degree Days
3,672.6
Base 50F
Last Spring Frost
04/18
First Fall Frost
10/20
Days Above 95F
34
Hardiness Zone
6a
Seeding Calendar — Zone 6A
Seasonal Lawn Care Checklist
Spring
- Apply pre-emergent herbicide when soil reaches 55F
- Begin mowing when grass reaches 3 inches
- 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
- Overseed warm-season lawns if thinning
- Apply fall fertilizer (highest N application for cool-season)
- Continue mowing until growth stops
- Rake or mulch leaves to prevent smothering
Winter
- Apply pre-emergent for winter weeds
- Service mower and sharpen blades
- Plan spring soil amendments based on fall test
- Keep lawn clear of debris
Watering Deficit Calculator
Monthly Deficit
0.5"
inches of water
Monthly Water
1,609
gallons
Estimated Monthly Cost
$12.88
at $0.008/gallon average
Estimates based on 40" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Scott County
Persistent Drought Conditions
Scott County experienced drought conditions for 30 of the past 52 weeks. Prioritize water-efficient grasses and consider reducing lawn area.
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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