Lawn Care Guide for Grundy County
Grundy County, Tennessee
Data Story
About Lawn Care in Grundy County, Tennessee
Cooler Conditions in Grundy County
Grundy County's lawn difficulty score of 57.1 makes it easier to manage than the typical Tennessee lawn. The 7a hardiness zone and lower average temperatures create a less punishing environment for cool-season grasses.
High Precipitation and Low Heat
With 63.2 inches of annual rain, this is the wettest county on our list, far exceeding the state average of 55.6. Homeowners only deal with 8 extreme heat days per year, drastically reducing the risk of summer dormancy.
Amending Sandy Silt Loam
The soil is moderately well-drained with a high sand content of 36.0%, which is excellent for root aeration. However, the pH is quite low at 5.16, so you will likely need lime to neutralize the acidity for optimal growth.
Abundant Water but Dry Pockets
The county spent 12 weeks in drought last year and currently sits at 100% abnormally dry. Despite the high annual rainfall, the sandy soil can lose moisture quickly, so keep an eye on your turf during dry spells.
Building a Lush Grundy Lawn
The cooler July average of 73.2°F is perfect for Kentucky bluegrass and fine fescues. Start your spring projects after the April 21 frost date to avoid any late-season damage to new seedlings.
Lawn Difficulty Score
Soil Summary
pH
5.2
Texture
Silt loam
Drainage
Moderately well drained
Organic Matter
2.1%
Recommended Grasses
Tall Fescue
Festuca arundinacea
Bermudagrass
Cynodon dactylon
Climate Snapshot
Annual Precip
63.2"
Growing Degree Days
3,485.5
Base 50F
Last Spring Frost
04/21
First Fall Frost
10/20
Days Above 95F
8
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 63" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Grundy County
Excess Moisture & Fungal Disease
High annual rainfall (63 inches) increases risk of fungal diseases like brown patch and dollar spot. Ensure good drainage and avoid overwatering.
Acidic Soil
Soil pH of 5.2 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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