Lawn Care Guide for Lee County
Lee County, Illinois
Data Story
About Lawn Care in Lee County, Illinois
User-Friendly Lawn Conditions in Lee
Lee County boasts a lawn difficulty score of 73.4, indicating it is much easier to maintain than the national average of 50.0. The Zone 5b climate is generally forgiving for those trying to keep a lush, green yard.
Mild Temperatures Support Steady Growth
Climate conditions are mild, with only 11 extreme heat days per year compared to the Illinois average of 27. The 37.6 inches of annual precipitation and 2,935 growing degree days provide a predictable and steady growing cycle.
Sandy Soil Mix Aids Drainage
The soil features a pH of 6.47 and a relatively high sand content of 30.1%, which typically aids in drainage. The 19.3% clay content suggests the soil is less prone to heavy compaction than elsewhere in the state.
Conserving Water in Abnormally Dry Times
Drought resilience is tested as 100% of the county is currently abnormally dry after 30 weeks of drought in the past year. To conserve water, avoid heavy fertilization during dry spells to prevent burning the stressed turf.
Spring Planting Windows in Lee County
Fine fescue and Kentucky Bluegrass blends are ideal for these northern conditions and the October 15 frost date. You can safely start your spring lawn work once the threat of frost passes around April 27.
Lawn Difficulty Score
Recommended Grasses
Tall Fescue
Festuca arundinacea
Climate Snapshot
Annual Precip
37.6"
Growing Degree Days
2,935.3
Base 50F
Last Spring Frost
04/27
First Fall Frost
10/15
Days Above 95F
11
Hardiness Zone
5b
Seeding Calendar — Zone 5B
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
0.6"
inches of water
Monthly Water
2,018
gallons
Estimated Monthly Cost
$16.14
at $0.008/gallon average
Estimates based on 38" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Lee County
Persistent Drought Conditions
Lee 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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