How Often Should I Mow My Lawn in Louisiana?

In South Louisiana, mow every 7 days during peak season (April–September) and every 10–14 days in fall and winter. Our heat, humidity, and nearly year-round growing season push grass to grow faster than almost anywhere else in the country.

Why Louisiana Lawns Grow So Fast

Tangipahoa Parish sits in USDA hardiness zones 8b–9a, which means we have long, hot, humid summers and brief, mild winters. St. Augustine grass — the dominant turf across Hammond, Ponchatoula, Amite, and the surrounding parishes — thrives in these conditions. Combined with our average annual rainfall of over 60 inches, the result is aggressive, fast growth that demands a consistent mowing schedule. Miss a week during July and you can easily come back to a yard that's six inches tall.

Compare this to northern states where homeowners mow 20–25 times per year. A South Louisiana homeowner on a healthy St. Augustine lawn might mow 30–36 times annually. If you're not keeping pace with that schedule, your lawn maintenance routine is falling behind — and the lawn will show it.

The Seasonal Mowing Calendar for South Louisiana

Rather than picking a fixed interval and sticking to it all year, the smartest approach is to match your mowing frequency to the growth rate:

• March–April: Growth picks up as soil temperatures rise above 65°F. Start mowing every 10 days, moving toward weekly as April heats up.
• May–September: Peak season. Mow every 7 days without exception. Many lawns in our area could use it every 5–6 days at the height of summer.
• October–November: Growth slows. Stretch to every 10–14 days. Keep an eye on conditions rather than rigidly following a timer.
• December–February: Minimal growth. Mow only as needed, typically every 3–4 weeks on warm stretches. Skip entirely during cold snaps.

The One-Third Rule — Never Ignore It

Regardless of how often you mow, never remove more than one-third of the grass blade in a single cut. If your St. Augustine has grown to 6 inches because you missed a few weeks, don't scalp it back to 3.5 inches in one pass. Instead, cut to 4.5 inches first, wait a few days, then cut again to your target height of 3.5–4 inches. Scalping stresses the grass and exposes the soil to weed seeds and harsh Louisiana sun.

Mowing Height Matters as Much as Frequency

Set your mower deck to 3.5–4 inches for St. Augustine. This is higher than what many mower manufacturers suggest as default settings, so double-check your deck height with a ruler. Taller grass shades the soil, retains moisture, and naturally suppresses weeds — all critical in our climate. Zoysia grass, if you have it, can be maintained at 1.5–2.5 inches. Centipede performs best at 1.5–2 inches.

Timing Your Cuts for Louisiana Weather

Louisiana afternoons from June through September are brutally hot. Mow in the early morning or early evening to reduce heat stress on both you and the turf. Avoid mowing immediately after rain — wet St. Augustine tears instead of cutting cleanly, and tire tracks from a mower on saturated soil can rut your lawn. If daily afternoon thunderstorms are pushing your schedule off, prioritize getting the cut in during a dry morning window, even if the ground is slightly damp.

If keeping up with South Louisiana's mowing demands feels like a second job, professional lawn maintenance from a local company is worth considering. Consistent weekly cuts by someone who understands regional grass types can make a significant difference in the long-term health and appearance of your lawn.