Lawn Care Guide for St. Martin Parish
St. Martin Parish, Louisiana
Data Story
About Lawn Care in St. Martin Parish, Louisiana
St. Martin lawn care demands precision
St. Martin Parish earns a difficulty score of 30.9, making it slightly easier to manage than its neighbor St. Landry but still harder than the national average. This Zone 9a parish requires consistent maintenance to stay green.
Excessive rain meets moderate heat
Annual precipitation reaches 66.6 inches, which is nearly 17 inches above the ideal upper limit for most turfgrass. While rainfall is high, the area only sees 70 extreme heat days, which is lower than the Louisiana state average.
Ideal pH but heavy clay
The local soil pH of 6.10 falls perfectly within the ideal 6.0-7.0 range for nutrient uptake. However, a high clay content of 33.7% means gardeners must watch for compaction and aeration needs.
Managing a year of drought
The parish weathered 25 weeks of drought in the last year, though only 5.9% of the area remains in severe drought currently. Mulching your lawn clippings helps retain moisture during these frequent dry periods.
Time your planting for February
Zoysia and St. Augustine are excellent choices for the local soil and humidity levels. Aim to begin your lawn projects after the typical last frost on February 21.
Lawn Difficulty Score
Recommended Grasses
Bermudagrass
Cynodon dactylon
Climate Snapshot
Annual Precip
66.6"
Growing Degree Days
6,775.8
Base 50F
Last Spring Frost
02/21
First Fall Frost
12/01
Days Above 95F
70
Hardiness Zone
9a
Seeding Calendar — Zone 9A
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 67" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in St. Martin Parish
Excess Moisture & Fungal Disease
High annual rainfall (67 inches) increases risk of fungal diseases like brown patch and dollar spot. Ensure good drainage and avoid overwatering.
Persistent Drought Conditions
St. Martin Parish experienced drought conditions for 25 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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