Lawn Care Guide for Calhoun County
Calhoun County, Illinois
Data Story
About Lawn Care in Calhoun County, Illinois
Reliable Growing in Calhoun County
Calhoun County offers a lawn difficulty score of 71.9, outperforming the Illinois state average. Situated in Hardiness Zone 6b, it provides a stable environment for those looking to maintain a healthy yard. While more challenging than northern counties, it remains a favorable spot for local gardeners.
Ample Rain with Typical Heat
The county receives 42.2 inches of rain annually, which is slightly higher than the state average. You will need to manage 29 extreme heat days, requiring consistent irrigation during the peak of summer. The combination of high moisture and heat can promote rapid growth but also increases the risk of fungal issues.
Excellent pH and Clay Structure
Calhoun's soil pH of 6.48 is nearly perfect for lawn health, sitting right at the top of the preferred range. The soil contains 21.8% clay and 11.9% sand, meaning it holds onto moisture and nutrients very effectively. Aeration is recommended to keep the heavy clay from suffocating grass roots during wet seasons.
Managing Abnormally Dry Soil
While 100% of the county is currently abnormally dry, there are no severe drought conditions reported at this time. The county has navigated 24 weeks of drought over the past year. Maintaining a higher mowing height can help shade the soil and preserve the moisture provided by the area's generous rainfall.
Optimal for Transition Zone Turf
Zone 6b is an ideal transition zone where tall fescues really shine due to their heat and cold tolerance. Although specific frost dates for Calhoun are not available, typical mid-April start times apply to the region. Start your seeding in the late summer or early fall for the most resilient results.
Lawn Difficulty Score
Recommended Grasses
Tall Fescue
Festuca arundinacea
Climate Snapshot
Annual Precip
42.2"
Growing Degree Days
N/A
Base 50F
Last Spring Frost
N/A
First Fall Frost
N/A
Days Above 95F
29
Hardiness Zone
6b
Seeding Calendar — Zone 6B
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
0.4"
inches of water
Monthly Water
1,155
gallons
Estimated Monthly Cost
$9.24
at $0.008/gallon average
Estimates based on 42" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Calhoun County
Persistent Drought Conditions
Calhoun County experienced drought conditions for 24 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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