Lawn Care Guide for Monroe County
Monroe County, Wisconsin
USDA SSURGO / PHZMData Story
About Lawn Care in Monroe County, Wisconsin
User-Friendly Growing Conditions in Monroe County
Monroe County boasts a healthy lawn difficulty score of 74.3, well above the national median of 50.0. The region sits in hardiness zone 5a, requiring cool-season grass varieties that can handle the cold Wisconsin winters.
Optimal Precipitation for Steady Growth
The county averages 35.3 inches of rain annually, which is slightly above the state average and perfect for maintaining soil moisture. Eight extreme heat days and 2,558 growing degree days ensure a steady, manageable mowing schedule throughout the summer.
Addressing Slightly Acidic Sandy Soils
The soil pH of 5.78 is slightly below the ideal 6.0 range, suggesting that a light lime application may benefit some lawns. With 34.7% sand and 11.4% clay, the soil provides a decent balance, though specific drainage data is currently unavailable for the area.
Conserving Water After Recent Dry Weeks
The county only saw two weeks of drought in the past year, currently maintaining a 0% rating for abnormally dry conditions. Maintaining a higher mowing height of three inches can help shade the soil and preserve moisture during the occasional dry spell.
Wait for the May Warmth
Fine Fescues and Kentucky Bluegrass are excellent choices for zone 5a and Monroe's 35-inch rainfall levels. Plan your seeding projects after the last spring frost on May 9 to ensure the soil is warm enough for germination.
Lawn Difficulty Score
Top Grass Fit for Monroe County
Excellent match
Jonathan Green Black Beauty Ultra
Jonathan Green
Top cultivar score: 100/100
Zone 5a vs Tall Fescue's 3–8 band.
Soil pH 5.78472464568312 vs Tall Fescue's 5.5–6.5 window.
Precipitation 35.295" + soil AWC vs Tall Fescue's 20–30" need.
Growing-degree-days + frost window vs a intermediate-difficulty establishment.
If you spend any time on lawn care forums, Reddit's r/lawncare, or YouTube lawn channels, one name comes up more than any other: Jonathan Green Black Beauty Ultra. It's practically a cult favorite, and the label, cultivar story, and long-running owner reports explain why. The secret is in the genetics.
In Monroe County, USDA zone 5a, soil pH 5.8, Jonathan Green Black Beauty Ultra scores 100/100 — a strong zone match, adequate moisture, and a long enough establishment window.
Why we ruled these out
- Scotts Turf Builder Bermudagrass — USDA zone 5a is below Scotts Turf Builder Bermudagrass's effective range (6–11); not recommended for this county.
See our fit-score methodology for how survivability is determined.
Recommended Grasses
Tall Fescue
Festuca arundinacea
Climate Snapshot
Annual Precip
35.3"
Growing Degree Days
2,557.9
Base 50F
Last Spring Frost
05/09
First Fall Frost
10/14
Days Above 95F
8
Hardiness Zone
5a
Seeding Calendar — Zone 5A
Seasonal Lawn Care Checklist
Spring
- Apply pre-emergent herbicide when soil reaches 55F
- Overseed bare spots once frost risk passes
- 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
- Core aerate compacted areas
- Apply fall fertilizer (highest N application for cool-season)
- Continue mowing until growth stops
- Rake or mulch leaves to prevent smothering
Winter
- Avoid walking on frozen turf
- Service mower and sharpen blades
- Plan spring soil amendments based on fall test
- Keep lawn clear of debris
Watering Deficit Calculator
Monthly Deficit
0.8"
inches of water
Monthly Water
2,498
gallons
Estimated Monthly Cost
$19.99
at $0.008/gallon average
Estimates based on 35" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Lawn Care Advisory: Monroe County
Lawn Verdict
Monroe County sits in USDA hardiness zone 5a, a transitional zone where cool-season grasses dominate but some warm-season varieties can survive. with winter lows reaching around -20.0°F. and 2,557.9 growing degree days, sufficient for most common turfgrasses. Moderate rainfall (35.3 inches) generally supports healthy lawns with minimal supplemental watering.
Seasonal Breakdown
Wait until after May 9 to seed or overseed; soil temperatures should consistently reach 50-55°F. Cool summers (July averages 71.2°F) reduce heat stress — maintain regular mowing and moderate watering. Aerate and overseed cool-season lawns by early fall, well before October 14; this is the best renovation window. Winters are harsh (January averages 16.1°F); avoid foot traffic on frozen turf and plan snow mold prevention.
Watering Guidance
With 35.3 inches of annual rainfall, established lawns typically need watering only during extended dry spells. The county is currently free of drought conditions. Cool summers reduce water demand; overwatering is a bigger risk than drought stress.
Regional Context
Monroe County is close to the Wisconsin average temperature, USDA zone 5a 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 Monroe County in?
What is the best grass for Monroe County?
How much rainfall does Monroe County get?
What is the soil pH in Monroe County?
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 Monroe County