Lawn Care Guide for Grant County
Grant County, Wisconsin
Data Story
About Lawn Care in Grant County, Wisconsin
Thriving Lawns in Grant County
Grant County’s 67.9 difficulty score indicates that lawn care here is easier than the state average. The 5a hardiness zone provides a warm, southern-Wisconsin environment that is very conducive to healthy grass.
Abundant Rain and High Growth
With 37.5 inches of annual rain, this county exceeds the state average and keeps lawns well-hydrated. However, homeowners must manage 10 extreme heat days and a high 2,743 growing degree days which accelerate mowing frequency.
Excellent Soil for Optimal Growth
The soil pH of 6.25 is within the ideal range for nutrient availability, requiring few amendments. A balanced mix of 17.4% clay and 29.4% sand provides a stable environment that retains moisture while allowing for adequate drainage.
Managing 100% Abnormal Dryness
The entire county is currently classified as abnormally dry after 31 weeks of drought in the past year. Deep soaking twice a week is more effective than daily light watering for maintaining a green lawn under these conditions.
Prime Growing Conditions in Southwest Wisconsin
Kentucky Bluegrass and Tall Fescue are excellent choices for this warm 5a zone. Seeding can begin early here, as the final frost typically occurs by April 30th.
Lawn Difficulty Score
Recommended Grasses
Tall Fescue
Festuca arundinacea
Climate Snapshot
Annual Precip
37.5"
Growing Degree Days
2,743.067
Base 50F
Last Spring Frost
04/30
First Fall Frost
10/11
Days Above 95F
10
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
0.6"
inches of water
Monthly Water
2,007
gallons
Estimated Monthly Cost
$16.05
at $0.008/gallon average
Estimates based on 37" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Grant County
Persistent Drought Conditions
Grant County experienced drought conditions for 31 of the past 52 weeks. Prioritize water-efficient grasses and consider reducing lawn area.
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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