THE LAWN NERD
It’s late August, and here’s the honest read on your yard: it isn’t growing. It’s holding on.
Soil temps across our ZIPs are running in the high 80s to mid 90s. At that range, Bermuda slows way down and St. Augustine mostly stops putting out new growth and spends its energy just staying alive. Add one-day-a-week irrigation and you get a lawn that looks tired no matter what you do. That’s not failure. That’s August.
So the useful question isn’t how to make the grass grow this month. It’s what’s coming next, and it’s closer than it feels.
Here’s the number to watch: 70 degrees of soil temperature. Winter weeds like henbit, chickweed, and poa annua don’t germinate on a calendar date. They germinate when soil temp drops to around 70 and stays there. In our part of Austin that’s usually somewhere in the back half of September, though it moves year to year depending on how fast the heat breaks.
That single number drives most of what happens in the fall. Pre-emergent timing keys off it. Overseeding keys off it. The recovery growth window for St. Augustine keys off it. Miss it by three weeks in either direction and the work doesn’t do much.
Want to actually track it instead of guessing? Buy a soil thermometer. They run about twelve dollars. Push it two inches into the ground in a shady spot, same spot every time, and check every few days starting around Labor Day, which is two weeks out. Morning readings, before the sun gets on it. When you see 70 and it holds for several days running, the clock has started.
Everybody else in the neighborhood will be going off the calendar. You’ll be going off the actual ground temperature, which is the only thing the seeds care about.
Between now and then? Mow high, water on your day, and don’t fertilize. Feeding a lawn that’s already stressed just pushes growth the roots can’t support.
THE NEIGHBOR
A few things worth knowing around our corner of Austin:
School’s back, so shift your yard noise. Round Rock ISD has been in session a couple of weeks and the streets are busy early again. If you run the mower or blower at 7 a.m., pushing it an hour later keeps you clear of kids on the corners in Milwood, Wells Branch, and Anderson Mill.
Still Conservation Stage. Austin has been at Conservation Stage since September 2025 and nothing changes heading into fall. Automatic sprinklers stay at one day a week, odd addresses Friday and even addresses Tuesday, before 10 a.m. or after 7 p.m. Hand watering with a shutoff nozzle is allowed any day.
Oak pruning gets safe again soon. If you’ve got live oaks and you’ve been waiting to cut, the risky stretch for oak wilt runs February through June, when the beetles that spread it are most active. Late fall and winter are the safer windows. Paint any fresh cut regardless of season. Given how many mature live oaks we have across Great Hills and Canyon Creek, this one matters more here than most places.
It’s My Park Day is coming in November. Austin Parks Foundation runs its citywide volunteer day the first Saturday of November, and projects are proposed by neighbors rather than assigned from downtown. If your local park or greenbelt needs something, that’s the mechanism. Proposals go in well ahead of the date at austinparks.org.
THE FIXER
The problem this month: you can’t tell if it’s dead or just dormant.
Half the yards in NW Austin have a brown section right now, and the owner is standing there trying to decide whether to panic. Here’s how to actually know.
The tug test. Grab a handful of the brown grass and pull straight up, firm but not violent. Dormant grass holds. The roots are alive and they’re gripping. Dead grass comes up in your hand with no resistance, like pulling hair out of a wig.
Do this in several spots. Lawns rarely die uniformly, so you’ll often find dormant grass three feet from dead grass.
Check the crown. Part the brown blades and look at the base where they meet the soil. Dormant grass has a firm, slightly greenish or cream-colored crown down there even when everything above it is brown and crispy. Dead grass is brown all the way down and crumbles.
Look at the pattern. Dormancy is broad and even, usually worst in full sun. Dead spots have edges. Sharp lines, circles, or a shape that follows something like a driveway or a downspout point at a specific cause instead of general heat stress.
If it passes the tug test, do nothing. Seriously. It’ll come back on its own when temps drop, and anything you do to force it now makes things worse.
If it fails, don’t re-sod in August. Wait until late September. The grass you put down now will fight the same heat that killed the last batch.
THE SCOUT
This is the back of a commercial property over on North Lamar. Not the entrance, not the sign, not the part anybody photographs. Just a big open stretch of turf running back to the fence line.
Areas like this are the first thing to get skipped. No customer parks back here, so it slides a week, then three, and by the time anyone notices, it’s knee-high and the whole property feels neglected in a way people can’t quite point at.
We cut the whole thing. Stripes running clean to the tree line, edges tight against the fence.
An acre of maintained turf behind a building doesn’t win anybody a customer. But letting it go definitely costs you one eventually.
THE DEAL
Fall install season is the real one in Central Texas. September and October give new sod and new beds two mild seasons to root before next summer tests them, and stuff planted now outperforms anything that goes in next April.
Those calendars are filling up right now, so if you’ve been looking at a bare strip or a bed that’s been mulch and hope for two years, this is the week to get on the schedule.
We wrote up the full case for fall over spring, including the Austin Water sod variance most people find out about too late: nwaustinlawncare.com/blog/fall-landscape-installation-austin/
Worth a call if it’s been on your list: (512) 387-6066.