Lawn Care Guide for Jefferson County
Jefferson County, Tennessee
Data Story
About Lawn Care in Jefferson County, Tennessee
Easy Lawn Care in Jefferson
Jefferson County boasts a high lawn difficulty score of 64.6, making it one of the easiest places in Tennessee to maintain turf. This score is significantly higher than both the national average and the state average of 48.0.
Mild Summers and Ideal Rain
Homeowners benefit from a milder climate with only 24 extreme heat days, well below the state average of 36. Annual precipitation of 48.5 inches falls perfectly within the ideal 30-50 inch range for healthy grass.
Managing Silt Loam Foundations
Silt loam soil and moderately well-drained conditions provide a solid foundation for turf growth. However, the pH of 5.42 is low, so adding lime is often necessary to reach the preferred 6.0-7.0 level.
Monitoring Dry Conditions
Despite the high lawn score, 100% of the county is currently abnormally dry after 8 weeks of drought last year. Residents should monitor soil moisture closely during these dry spells to protect their well-established turf.
Maximizing the Growing Window
Zone 7b supports many grasses, but the early October 17 frost means the fall growing window is shorter than neighboring counties. Plant new seeds in the spring after the April 24 frost to maximize established growing time.
Lawn Difficulty Score
Soil Summary
pH
5.4
Texture
Silt loam
Drainage
Moderately well drained
Organic Matter
1.6%
Recommended Grasses
Tall Fescue
Festuca arundinacea
Bermudagrass
Cynodon dactylon
Climate Snapshot
Annual Precip
48.5"
Growing Degree Days
3,762.9
Base 50F
Last Spring Frost
04/24
First Fall Frost
10/17
Days Above 95F
24
Hardiness Zone
7b
Seeding Calendar — Zone 7B
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
0.0"
inches of water
Monthly Water
0
gallons
Estimated Monthly Cost
$0.00
at $0.008/gallon average
Estimates based on 49" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Jefferson County
Acidic Soil
Soil pH of 5.4 is below the ideal range for most grasses (6.0-7.0). Apply agricultural lime to raise pH gradually.
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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