Lawn Care Guide for Des Moines County
Des Moines County, Iowa
Data Story
About Lawn Care in Des Moines County, Iowa
Southwestern Iowa’s Lawn Success
Des Moines County scores an 80.7 for lawn ease, making it more manageable than the 77.2 state average. It is the only county in this group in Hardiness Zone 6a, allowing for a slightly wider variety of grass species and a more resilient growing environment.
The State’s Most Productive Growth
A high 3499 growing degree days and 39.4 inches of rain make this a very productive climate for turf. You will face 22 extreme heat days, meaning your mowing and watering schedules must remain active throughout the peak of July.
Reliable Soil for Deep Roots
The soil pH sits at a healthy 6.25, providing a great environment for microbial activity and root development. With 23.2% clay and 21.1% sand, the texture is well-balanced for retaining moisture without becoming overly compacted.
Persistent Dryness Requires Care
Despite 17 weeks of drought in the past year, current conditions show no severe drought, though 100% of the county is abnormally dry. Focus on evening watering to minimize evaporation and help your lawn survive the frequent high-heat days.
Early Starts in Zone 6a
The last spring frost typically occurs on April 18, giving you a head start compared to northern Iowa counties. With the first frost holding off until October 20, you have ample time to establish heat-tolerant cool-season blends.
Lawn Difficulty Score
Recommended Grasses
Tall Fescue
Festuca arundinacea
Climate Snapshot
Annual Precip
39.4"
Growing Degree Days
3,499.4
Base 50F
Last Spring Frost
04/18
First Fall Frost
10/20
Days Above 95F
22
Hardiness Zone
6a
Seeding Calendar — Zone 6A
Seasonal Lawn Care Checklist
Spring
- Apply pre-emergent herbicide when soil reaches 55F
- Begin mowing when grass reaches 3 inches
- 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
- Overseed warm-season lawns if thinning
- Apply fall fertilizer (highest N application for cool-season)
- Continue mowing until growth stops
- Rake or mulch leaves to prevent smothering
Winter
- Apply pre-emergent for winter weeds
- 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
1,809
gallons
Estimated Monthly Cost
$14.47
at $0.008/gallon average
Estimates based on 39" 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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