Lawn Care Guide for Sumner County
Sumner County, Tennessee
Data Story
About Lawn Care in Sumner County, Tennessee
Sumner County Lawn Care Overview
With a lawn difficulty score of 53.9, Sumner County is friendlier to grass than the national median of 50.0. This Zone 7b county provides a solid environment for homeowners looking for a lush landscape. You can expect fewer maintenance headaches here than in the more difficult 48.0 state average regions.
Heat and Rain in the Middle State
Sumner receives 54.5 inches of rain annually, slightly exceeding the ideal 50-inch threshold. You will deal with 37 extreme heat days annually, mirroring the state average of 36. These conditions require a careful balance of drainage and summer irrigation to keep grass from wilting.
Managing Well-Drained Clay Loam
The soil pH of 5.71 is slightly acidic but closer to the ideal 6.0-7.0 range than many neighboring counties. This well-drained clay loam contains 22.6% clay, providing good structure for holding essential nutrients. Minimal lime applications can help bridge the gap to a perfect nutrient-ready soil.
Drought Resilience and Water Use
The county experienced only 10 weeks in drought over the last year, though 47.8% of the area is currently abnormally dry. Use mulch-mowing to return clippings to the soil, which helps retain moisture and nutrients. This practice is particularly helpful during the 37 days when temperatures soar above 90°F.
Planting Windows for Sumner Lawns
Warm-season grasses like Zoysia or cool-season Tall Fescue both perform well in this climate. Time your planting between the last spring frost on April 7 and the first fall frost on October 30. Your lawn has a great foundation, so start your seasonal prep this week.
Lawn Difficulty Score
Recommended Grasses
Tall Fescue
Festuca arundinacea
Bermudagrass
Cynodon dactylon
Climate Snapshot
Annual Precip
54.5"
Growing Degree Days
4,360.133
Base 50F
Last Spring Frost
04/07
First Fall Frost
10/30
Days Above 95F
37
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 55" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Sumner County
Excess Moisture & Fungal Disease
High annual rainfall (55 inches) increases risk of fungal diseases like brown patch and dollar spot. Ensure good drainage and avoid overwatering.
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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