Lawn Care Guide for St. Croix County
St. Croix County, Wisconsin
Data Story
About Lawn Care in St. Croix County, Wisconsin
Above-Average Ease for Western Lawns
St. Croix County boasts a high lawn difficulty score of 71.4, making it one of the easier places in the state to maintain a yard. This score significantly exceeds both the national average of 50.0 and the state average of 64.4.
Ideal Heat and Growing Days
The region provides 2,241 growing degree days, giving turf plenty of energy to thrive through the season. With only 4 days of extreme heat per year, cool-season grasses are less likely to experience summer dormancy compared to other regions.
Balanced Texture and Improving pH
A soil composition of 40.2% sand and 13.5% clay provides a solid foundation for drainage and nutrient storage. The pH of 5.90 is nearly at the target threshold, meaning minimal liming is required to reach the ideal 6.0-7.0 range.
Excellent Drought Resilience
With only 3 weeks of drought over the past year and no current abnormally dry areas, St. Croix lawns are in excellent health. This lack of water stress allows homeowners to focus on aeration and fertilization rather than emergency irrigation.
A Robust Start in May
Hardiness Zone 4b is perfect for tough Kentucky Bluegrass or Tall Fescue varieties. Your primary growing window opens after the May 6 frost date and continues through the fall until early October.
Lawn Difficulty Score
Recommended Grasses
Tall Fescue
Festuca arundinacea
Climate Snapshot
Annual Precip
32.9"
Growing Degree Days
2,241.1
Base 50F
Last Spring Frost
05/06
First Fall Frost
10/02
Days Above 95F
4
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
0.9"
inches of water
Monthly Water
2,937
gallons
Estimated Monthly Cost
$23.50
at $0.008/gallon average
Estimates based on 33" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
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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