Lawn Care Guide for Putnam County
Putnam County, Tennessee
USDA SSURGO / PHZMThis week in Putnam County · next up in about 5 weeks (Sep 3)
Get ready to seed cool-season grass — the best fall window is about to open.
Data Story
About Lawn Care in Putnam County, Tennessee
Putnam County Offers Above-Average Potential
Putnam County scores 54.8 for lawn difficulty, outperforming the state average of 48.0 and the national score of 50.0. This Zone 7a county provides a relatively stable environment for homeowners looking to grow a green, healthy yard. Consistent rain and moderate heat create a favorable outlook for most turfgrasses.
Abundant Rainfall Fuels Fast Growth
Lawns here receive a generous 62.2 inches of annual precipitation, which is well above the ideal range and among the highest in the state. With 19 extreme heat days and 4084 growing degree days, the environment is productive but moist. Be prepared for frequent mowing and watch for moisture-related diseases during humid periods.
Testing is Key in High-Rain Zones
While specific soil texture data is not available, the high rainfall in Putnam County often leads to nutrient leaching. Maintaining a pH between 6.0 and 7.0 is essential for grass to utilize the soil's resources. A local soil test will help determine if your yard needs specific amendments to handle the 62+ inches of annual rain.
Steady Moisture and Low Drought Risk
The county has experienced only 13 weeks of drought in the past year, with less than half of the area currently classified as abnormally dry. There are no severe drought zones, making this one of the more water-stable counties in the region. Standard watering practices should suffice during the short dry spells.
Establishing Your Putnam County Lawn
Tall Fescue is a top choice for Zone 7a, as it handles the local moisture well. Plan your planting after the last spring frost on April 14 to give the grass a strong head start. Aim for full establishment before the first fall frost occurs on October 30.
Lawn Difficulty Score
Top Grass Fit for Putnam County
Cool-season grasses are the general fit here
County soil and zone data are incomplete, so we show a category recommendation rather than a precise cultivar score for Putnam County.
Recommended Grasses
Tall Fescue
Festuca arundinacea
Bermudagrass
Cynodon dactylon
Choosing grass in Putnam County
Cold winters (lows near 0°F) is the main thing shaping grass choice in Putnam County. Here's how to work with it — then the specific pick.
- Cold-hardy hybrid bluegrassA transition-zone option built to shrug off winterkill.
- Kentucky Bluegrass, explainedTraits, care, and where Kentucky Bluegrass wins — the species behind your top match.
Top match for Putnam County: Kentucky Bluegrass
See the full breakdownPremium Grass Seeds is a sister site in our network. We may earn a commission from qualifying purchases made through its retailer links — this never affects your price. Guidance here reflects your county’s climate and soil data, not hands-on testing.
Climate Snapshot
Annual Precip
62.2"
Growing Degree Days
4,084.25
Base 50F
Last Spring Frost
04/14
First Fall Frost
10/30
Days Above 95F
19
Hardiness Zone
7a
Seeding Calendar — Putnam County
Personalized to this county’s frost dates — a 199-day growing season. Windows below are computed from local last-spring and first-fall frost normals, so they differ county-to-county even within USDA Zone 7A.
Plan your seeding — Putnam County
Pick a grass and a goal to get a personalized schedule anchored to this county’s frost dates.
- 1Prepare the seedbedAug 20 – Sep 2
Mow low, dethatch or rake, and loosen the top ½ inch of soil so seed makes good contact.
- 2Sow seedSep 3 – Oct 1
Best window to sow Kentucky Bluegrass in Putnam County, anchored to your local frost dates.
- 3EstablishOct 2 – Oct 29
Protect young seedlings: mow only after they reach ~3 inches and hold off on weed pre-emergents until established.
Keep the seedbed consistently moist — roughly ¼ inch of water daily, split into shorter cycles if the surface dries out quickly. County-specific soil texture isn’t available here, so adjust to how fast your own soil drains.
You’re in the transition zone — both cool- and warm-season grasses can work; the schedule above follows the species you selected.
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 62" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Putnam County
Excess Moisture & Fungal Disease
High annual rainfall (62 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.
Lawn Care Advisory: Putnam County
Lawn Verdict
Putnam County falls in USDA hardiness zone 7a, a favorable range for both cool- and warm-season grasses. with winter lows reaching around 0.0°F. and 4,084.25 growing degree days annually, supporting vigorous warm-season lawns. High annual precipitation (62.2 inches) supports lush growth but increases disease pressure.
Seasonal Breakdown
Wait until after April 14 to seed or overseed; soil temperatures should consistently reach 50-55°F. Cool summers (July averages 76.1°F) reduce heat stress — maintain regular mowing and moderate watering. Aerate and overseed cool-season lawns by early fall, well before October 30; this is the best renovation window. Cool winters (January averages 36.1°F) mean slow or dormant growth; keep debris off the lawn.
Watering Guidance
Putnam County receives abundant rainfall (62.2 inches annually), so lawns rarely need supplemental irrigation. Currently, 0.9% of the county is in abnormally dry according to the US Drought Monitor. Standard warm-season watering of 1 inch per week is usually adequate during summer.
Regional Context
Putnam County is close to the Tennessee average temperature, it is somewhat wetter than the state average, USDA zone 7a helps guide grass selection compared to neighboring counties.
Want detailed soil composition, drainage classes, and soil series data? View soil details on SoilByCounty.com
Frequently Asked Questions
What USDA hardiness zone is Putnam County in?
What is the best grass for Putnam County?
How long is the growing season in Putnam County?
How much rainfall does Putnam County get?
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.
Explore more data for Putnam County