Lawn Care Guide for Winona County
Winona County, Minnesota
USDA SSURGO / PHZMData Story
About Lawn Care in Winona County, Minnesota
Prime Growing Conditions in the Southeast
Winona County is a premier spot for lawn care with an exceptional difficulty score of 83.8. This Hardiness Zone 4b region benefits from abundant moisture and a very favorable growing environment compared to the state average.
High Rainfall and Extended Growth
With 35.9 inches of annual precipitation, local lawns receive more water than the state average of 30.0 inches. The 2,920 growing degree days provide plenty of thermal energy for thick turf, even with 11 days of extreme heat.
Ideal pH for Nutrient Uptake
The soil pH of 6.47 is perfectly situated within the 6.0-7.0 ideal range for most turf species. With 17.8% clay and 28.1% sand, the soil structure is balanced enough to support healthy roots without frequent amendment.
Reliable Moisture Throughout the Year
Winona spent only 5 weeks in drought over the past year and currently has zero abnormally dry areas. This consistent moisture access makes Winona one of the most resilient counties in Minnesota for maintaining a green landscape.
A Long Window for Perfect Turf
The generous growing season runs from April 23rd all the way to October 19th. This nearly six-month window is the ideal time to seed Kentucky Bluegrass or perennial ryegrass for a thick, vibrant lawn.
Lawn Difficulty Score
Top Grass Fit for Winona County
Excellent match
Jonathan Green Black Beauty Ultra
Jonathan Green
Top cultivar score: 100/100
Zone 4b vs Tall Fescue's 3–8 band.
Soil pH 6.4690950659146 vs Tall Fescue's 5.5–6.5 window.
Precipitation 35.856" + 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 Winona County, USDA zone 4b, soil pH 6.5, 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
- Pennington Zenith Zoysia Grass Seed & Mulch — USDA zone 4b is below Pennington Zenith Zoysia Grass Seed & Mulch's effective range (5–10); not recommended for this county.
- Scotts Turf Builder Bermudagrass — USDA zone 4b 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
35.9"
Growing Degree Days
2,920.42
Base 50F
Last Spring Frost
04/23
First Fall Frost
10/19
Days Above 95F
11
Hardiness Zone
4b
Seeding Calendar — Zone 4B
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
2,564
gallons
Estimated Monthly Cost
$20.51
at $0.008/gallon average
Estimates based on 36" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Lawn Care Advisory: Winona County
Lawn Verdict
Winona County is in USDA hardiness zone 4b, one of the coldest zones in the country. with winter lows reaching around -25.0°F. and 2,920.42 growing degree days, sufficient for most common turfgrasses. Moderate rainfall (35.9 inches) generally supports healthy lawns with minimal supplemental watering.
Seasonal Breakdown
Wait until after April 23 to seed or overseed; soil temperatures should consistently reach 50-55°F. Cool summers (July averages 73.5°F) reduce heat stress — maintain regular mowing and moderate watering. Aerate and overseed cool-season lawns by early fall, well before October 19; this is the best renovation window. Winters are harsh (January averages 17.3°F); avoid foot traffic on frozen turf and plan snow mold prevention.
Watering Guidance
With 35.9 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
Winona County is 4.5°F warmer than the Minnesota average, it is somewhat wetter than the state average, USDA zone 4b 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 Winona County in?
What is the best grass for Winona County?
How much rainfall does Winona County get?
What is the soil pH in Winona 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.
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