Lawn Care Guide for Dubuque County
Dubuque County, Iowa
Data Story
About Lawn Care in Dubuque County, Iowa
Sandy Terrain in Dubuque
Dubuque County scores a 72.0 on the difficulty scale, making it slightly tougher than the state average but much easier than the national norm. Homeowners in this Zone 5a region must account for unique soil drainage and significant drought history.
Consistent Rain and Mild Heat
The county sees 38.8 inches of rain annually, well above the state average, and faces only 12 extreme heat days. These moderate temperatures and 2906 growing degree days create a pleasant environment for cool-season grasses to stay green.
Fast-Draining Loamy Fine Sand
Unlike most of Iowa, Dubuque features excessively drained loamy fine sand. While the 6.38 pH is ideal, the sandy texture means the soil does not hold water well, so your lawn may require more frequent watering than neighbors to the west.
Recovering from Significant Drought
With 31 weeks of drought over the past year, Dubuque has been the hardest hit in this group. Since 100% of the area is still abnormally dry, homeowners should use organic compost to improve the water-holding capacity of the sandy soil.
Target the Late April Window
Plan to seed after the last frost on April 28 to give your lawn a strong start. Because the sand drains quickly, ensure consistent moisture during the establishment phase before the first fall frost on October 11.
Lawn Difficulty Score
Soil Summary
pH
6.4
Texture
Loamy fine sand
Drainage
Excessively drained
Organic Matter
2.5%
Recommended Grasses
Tall Fescue
Festuca arundinacea
Climate Snapshot
Annual Precip
38.8"
Growing Degree Days
2,905.567
Base 50F
Last Spring Frost
04/28
First Fall Frost
10/11
Days Above 95F
12
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
1,751
gallons
Estimated Monthly Cost
$14.01
at $0.008/gallon average
Estimates based on 39" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Dubuque County
Persistent Drought Conditions
Dubuque 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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