Mow New Orleans warm-season grasses every 5 to 7 days from April through September, every 10 to 14 days from October through March. Heights vary by grass type: St. Augustine at 3 to 4 inches, Bermuda at 1 to 2 inches, Zoysia at 2 to 3 inches, Centipede at 1.5 to 2 inches. Never remove more than one-third of the blade height in a single mowing. Raise height slightly in peak summer heat. Sharpen the blade every 20 to 25 hours of use.
Last Updated: June 2025
Mowing looks simple until a lawn starts thinning, browning at the tips, or developing thatch problems. Most New Orleans lawn mowing mistakes fall into three categories: cutting too short, mowing too infrequently and then scalping to catch up, and running a dull blade. Getting the height and frequency right is one of the most impactful parts of lawn maintenance in New Orleans, and one of the cheapest to fix.
Mowing Heights by Grass Type
| Grass Type | Spring/Summer Height | Fall Height | Minimum, Never Below |
|---|---|---|---|
| St. Augustine | 3 to 4 inches | 3 inches | 2.5 inches |
| Bermuda | 1 to 2 inches | 1.5 inches | 0.5 inches (reel mower) |
| Zoysia | 2 to 3 inches | 2 to 2.5 inches | 1 inch |
| Centipede | 1.5 to 2 inches | 2 inches | 1 inch |
| Palmetto St. Augustine | 3 to 3.5 inches | 3 inches | 2.5 inches |
Raise height by half an inch during July and August heat spikes. Taller grass shades the soil, reduces evaporation, and keeps root-zone temperatures lower, a measurable difference in New Orleans summer heat that reduces irrigation needs and disease pressure simultaneously.
Mowing Frequency by Season
New Orleans grass growth does not stop in winter, but it slows dramatically. Adjust frequency with the season rather than mowing on a fixed schedule:
- March to May: Every 7 days. Growth accelerating from spring green-up.
- June to September: Every 5 to 7 days. Peak growing season. Fast-growing varieties (Bermuda, St. Augustine) may need twice-weekly mowing in fertilized yards.
- October: Every 7 to 10 days. Growth rate declining.
- November to February: Every 10 to 14 days or as needed. Mow when the lawn visibly needs it, not on schedule.
The trigger is always grass height, not the calendar. If the lawn looks overgrown after five days, mow. If it still looks right after eight days, wait.
The One-Third Rule: The Most Important Mowing Guideline
Remove no more than one-third of the blade height in any single mowing. This single rule prevents the most common damage from improper mowing:
If your St. Augustine target is 3 inches, mow when it reaches 4 to 4.5 inches. Removing the top inch to inch-and-a-half stresses the grass minimally and keeps the root system intact. Cutting from 5 inches down to 3 in a single pass removes more than one-third and shocks the plant, reducing photosynthesis for days afterward and exposing the lower stem tissue that burns and browns in summer heat.
If you miss mowings and the lawn gets away from you, lower the height gradually over two to three sessions: cut from 6 inches to 5, then 5 to 4, then 4 to 3. The week-by-week sequence looks tedious but produces far better results than a single scalping cut.
Common Mowing Mistakes in New Orleans Yards
Scalping, cutting too short, is the most damaging habit, especially on St. Augustine. Scalped St. Augustine goes thin and weedy quickly, and the recovery period in summer heat can take months. It also correlates directly with increased large patch disease pressure in fall, which LSU AgCenter identifies as the most common lawn disease in Louisiana.
Mowing wet grass creates clumping that blocks light and creates disease conditions. After summer afternoon storms, wait until the surface dries before mowing, typically two to three hours. Wet clippings sitting on the turf overnight in New Orleans humidity are a brown patch accelerant. The connection between mowing habits and fungal disease is covered in the disease identification guide at common lawn diseases in New Orleans.
Blade Sharpness: How to Check and When to Sharpen
A dull mower blade tears rather than cuts, leaving frayed brown tips across the lawn surface. Beyond the visual effect, torn grass wounds are larger than clean cuts and take longer to heal, increasing disease entry points during humid summer conditions.
Check blade condition by examining a cut blade of grass up close. Clean, straight cut: sharp. Torn, frayed, or folded edge: dull. Sharpen every 20 to 25 hours of mowing time, roughly every four to six weeks during the New Orleans growing season.
Frequently Asked Questions
How often should I mow my lawn in New Orleans?
During peak growing season (April through September), most New Orleans warm-season grasses need mowing every 5 to 7 days. From October through February, growth slows to every 10 to 14 days or less. Mow when the grass reaches the upper end of its target height range, not on a fixed calendar schedule.
What height should I mow St. Augustine grass in New Orleans?
Mow St. Augustine at 3 to 4 inches in spring and summer. Raise to 4 inches in summer heat above 90°F to protect the soil and reduce irrigation needs. Never cut below 2.5 inches. Scalping St. Augustine exposes the soil, promotes weed germination, and stresses the grass heading into summer heat.
Should I bag or mulch lawn clippings in New Orleans?
Mulch clippings back into the lawn when following the one-third rule consistently. Short clippings decompose quickly and return nitrogen to the soil. Bag clippings if the lawn has active brown patch disease, if the lawn grew too tall between mowings, or if thatch buildup exceeds 1 inch deep.
What is the one-third rule for mowing?
The one-third rule means never removing more than one-third of the grass blade height in a single mowing. If the target height is 3 inches, mow when the grass reaches 4 to 4.5 inches. After missed mowings, lower the height gradually over two to three sessions rather than scalping back to target height all at once.
When should I sharpen my mower blade for a New Orleans lawn?
Sharpen mower blades every 20 to 25 hours of mowing time, roughly every four to six weeks during peak growing season. Dull blades tear grass rather than cut it cleanly, leaving ragged brown tips visible from across the yard and creating entry points for fungal disease.
Consistent mowing is part of a complete lawn program. Big Easy Sod’s lawn care maintenance service handles mowing on the right schedule so your lawn stays at the right height all season without the guesswork.
