Lawn Care Guide for Lafourche Parish
Lafourche Parish, Louisiana
Data Story
About Lawn Care in Lafourche Parish, Louisiana
Lafourche Parish Lawn Outlook
Lafourche Parish earns a score of 35.8, making it one of the easier places in Louisiana to maintain a lawn, though still harder than the national average. This coastal 9b zone benefits from slightly fewer extreme heat days than its inland neighbors. However, unique soil and drought challenges still require a specialized approach.
Abundant Rain and High Growth
The parish receives a massive 68.9 inches of annual precipitation, far exceeding the 50-inch ideal threshold. While the 66 extreme heat days are lower than the state average, the high humidity and 7,389 growing degree days keep grass active. This environment is perfect for tropical weeds and fungi, so consistent maintenance is mandatory.
Ideal pH but Heavy Clay
Lafourche boasts a near-perfect soil pH of 6.01, which is ideal for nutrient availability in lawns. The main hurdle is the 37.9% clay content, the highest in the region, which significantly slows drainage. You must avoid overwatering and use aeration to keep the soil from becoming a muddy mess during rainy weeks.
Critical Drought Conditions
Lafourche faces extreme drought stress right now, with 98.5% of the parish categorized as D2 or higher. Despite having 68.9 inches of annual rain on average, the past year included 14 weeks of drought that have taken a toll. Strict water conservation and deep-soaking irrigation are required to keep lawns alive during these intense dry spells.
Planting for the 9b Zone
St. Augustine and Seashore Paspalum are excellent choices for the heavy clay and coastal humidity of Lafourche. Your growing window starts early, following the last frost on February 8th. With the first frost delayed until December 19th, you have an exceptionally long time to establish and enjoy a healthy lawn.
Lawn Difficulty Score
Recommended Grasses
Bermudagrass
Cynodon dactylon
Climate Snapshot
Annual Precip
68.9"
Growing Degree Days
7,388.65
Base 50F
Last Spring Frost
02/08
First Fall Frost
12/19
Days Above 95F
66
Hardiness Zone
9b
Seeding Calendar — Zone 9B
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
- Raise mowing height to reduce heat stress
- 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
- Overseed with ryegrass for winter color
Watering Deficit Calculator
Monthly Deficit
0.0"
inches of water
Monthly Water
0
gallons
Estimated Monthly Cost
$0.00
at $0.008/gallon average
Estimates based on 69" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Lafourche Parish
Excess Moisture & Fungal Disease
High annual rainfall (69 inches) increases risk of fungal diseases like brown patch and dollar spot. Ensure good drainage and avoid overwatering.
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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