Lawn Care Guide for Robertson County
Robertson County, Tennessee
Data Story
About Lawn Care in Robertson County, Tennessee
Typical Tennessee Lawn Conditions
Robertson County scores a 48.7 on the lawn difficulty scale, placing it right in line with the Tennessee state average of 48.0. Located in Zone 7a, the county offers a standard challenge for Middle Tennessee homeowners. While it is slightly more difficult than the national average, the conditions are predictable for seasonal care.
Warm Summers and Long Growing Cycles
The county experiences 44 extreme heat days per year, which is significantly higher than the state average of 36 days. With 4,509 growing degree days and 53.3 inches of rain, turf manages a vigorous growing cycle. Mowing schedules must remain aggressive from mid-April through late October to keep up with the 58.1°F average annual temperature.
Working with Gravelly Silt Loam
The soil is classified as well-drained gravelly silt loam with a pH of 5.60, which is slightly below the ideal 6.0 range. A 21.3% clay content provides good structure, but the gravelly texture ensures water doesn't pool around root systems. Adding organic matter can help bridge the gap between this acidic baseline and the needs of a lush lawn.
Recovering from Dry Spells
The county spent 15 weeks in drought last year, and currently, 100% of the area is abnormally dry. Fortunately, no part of the county is currently in severe drought, making recovery easier with consistent supplemental watering. Aim for one inch of water per week, delivered early in the morning to minimize evaporation and disease risk.
Planting Success in Zone 7a
Tall Fescue is the regional favorite for Zone 7a, though heat-tolerant Zoysia also performs well. The safest time to start your lawn is after the final spring frost on April 9 or during the fall cool-down. Consistent fertilization and lime treatments will help you overcome the local soil acidity and heat intensity.
Lawn Difficulty Score
Soil Summary
pH
5.6
Texture
Gravelly silt loam
Drainage
Well drained
Organic Matter
1.9%
Recommended Grasses
Tall Fescue
Festuca arundinacea
Bermudagrass
Cynodon dactylon
Climate Snapshot
Annual Precip
53.3"
Growing Degree Days
4,508.6
Base 50F
Last Spring Frost
04/09
First Fall Frost
10/28
Days Above 95F
44
Hardiness Zone
7a
Seeding Calendar — Zone 7A
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 53" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Robertson County
Excess Moisture & Fungal Disease
High annual rainfall (53 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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