Lawn Care Guide for Keokuk County
Keokuk County, Iowa
Data Story
About Lawn Care in Keokuk County, Iowa
Reliable Results in Keokuk County
Keokuk County earns a lawn difficulty score of 77.5, placing it right at the Iowa state average. Situated in Zone 5b, it offers a predictable environment for traditional Midwestern lawns. Homeowners here find it much easier to keep a lawn green than the national median of 50.0.
Typical Iowa Weather Supports Growth
With 37.4 inches of rain and 16 extreme heat days, Keokuk County aligns closely with the state's average climate. The 3,046 growing degree days provide enough warmth for steady turf development from spring through fall. Mowing typically begins in late April as the season warms up.
High Clay Content Requires Careful Management
The soil pH is a favorable 6.25, but the 25.6% clay content is higher than many neighboring counties. This density helps the soil hold onto water and nutrients but can lead to drainage issues during heavy 37-inch rain years. Regular aeration is the best way to keep these heavy soils from suffocating grass roots.
Moderate Drought Exposure
The county spent 14 weeks in drought over the past year, and 100% of its area is currently abnormally dry. However, the lack of severe D2+ drought means most lawns can recover quickly with supplemental watering. Raising mower heights to 3.5 inches can help the soil stay cool and retain moisture during dry weeks.
Optimizing the 5b Planting Window
Grass seeding is most successful after the April 24 spring frost or before the October 15 fall frost. Cool-season blends like Bluegrass and Fescue are the best fit for this hardiness zone. Starting in late August allows the grass to establish deep roots before the first hard freeze.
Lawn Difficulty Score
Recommended Grasses
Tall Fescue
Festuca arundinacea
Climate Snapshot
Annual Precip
37.4"
Growing Degree Days
3,046.4
Base 50F
Last Spring Frost
04/24
First Fall Frost
10/15
Days Above 95F
16
Hardiness Zone
5b
Seeding Calendar — Zone 5B
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
0.7"
inches of water
Monthly Water
2,168
gallons
Estimated Monthly Cost
$17.34
at $0.008/gallon average
Estimates based on 37" 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.
Explore more data for Keokuk County