Ask ten Southwest Florida homeowners how often they mow and you'll get ten answers. The honest one is: it depends on the season. A lawn that's perfectly happy on an every-other-week cut in March can look shaggy four days after a June mow. The rains change everything.
Most local lawns are St. Augustine grass, and St. Augustine is a warm-season grass that does the bulk of its growing when it's hot and wet. From roughly June through September, that's exactly the weather we get. Here's how to think about mowing cadence so your lawn stays healthy — not just short.
The one-third rule sets the schedule
The single most useful rule in lawn care is this: never remove more than one-third of the grass blade in a single mow. Cut more than that and you shock the plant — it loses too much leaf surface at once, the roots get stressed, and the lawn turns pale and patchy while it recovers.
That rule is what really sets your cadence. It's not a fixed number of days; it's a question of how fast the grass is growing. If your lawn is kept at four inches, the one-third rule means you mow before it reaches about six inches. In the dry season that might take two weeks. In the wet season, with heat and daily afternoon storms, it can happen in five or six days.
Dry season vs. rainy season cadence
As a working guide for a typical St. Augustine lawn in Lee, Collier, or Charlotte County:
- Dry season (roughly November through May): every 10 to 14 days is usually fine. Growth is slow, and over-mowing a stressed dry-season lawn does more harm than waiting.
- Rainy season (roughly June through September): every 7 days, sometimes tighter. Through a stretch of heavy afternoon storms, a lawn can genuinely need a cut weekly to stay inside the one-third rule.
This is the main reason a fixed weekly route matters in summer. A lawn that gets skipped for ten days in July isn't just untidy — it forces whoever mows it to break the one-third rule to get it back down, which sets the lawn back instead of helping it.
Why mowing wet grass is a problem
Summer in Southwest Florida means the grass is wet a lot — morning dew, afternoon storms, running irrigation. It's tempting to mow it wet just to stay on schedule, but wet mowing causes real problems:
- Clumping. Wet clippings stick together and mat down on the lawn, smothering the grass underneath and leaving brown patches.
- Uneven cut. Wet blades bend under the mower instead of standing up, so they spring back tall after they dry and the lawn looks ragged.
- Disease spread. Fungal problems like gray leaf spot thrive in our humidity, and a mower rolling through a wet lawn carries spores from one area to the next.
- Rutting and compaction. A heavy mower on saturated ground leaves tire ruts and packs down the soil, which hurts roots over time.
The practical fix is timing, not skipping. Mowing is best done once the lawn has had a chance to dry — usually late morning after the dew burns off, and before the afternoon storms roll in. A crew that knows the local weather pattern plans the route around that window.
A few habits that make weekly mowing work harder
- Keep the blade sharp. A dull blade tears the grass instead of slicing it, leaving frayed white tips that brown out and invite disease. Sharpening every month or two through the growing season makes a visible difference.
- Don't scalp it. St. Augustine does best kept tall — around 3.5 to 4 inches. Taller grass shades the soil, holds moisture, and crowds out weeds. Cutting it short to buy time between mows backfires.
- Leave the clippings. When you're mowing on schedule, the clippings are small and break down fast, returning nitrogen to the soil. That's free fertilizer — and it matters even more in summer, when fertilizing is restricted.