Round Rock, TX Lawn Care Calendar
In a typical year, put down crabgrass preventer in Round Rock between Feb 4 and Feb 26. Seed or sod warm-season grass between Mar 22 and Sep 22. The last spring frost usually comes around Feb 20. Most lawns here are warm-season grass (Bermuda, zoysia, St. Augustine, centipede).
Typical lawn care dates in Round Rock
| Task | Typical window |
|---|---|
| Crabgrass preventer (pre-emergent)Crabgrass sprouts once soil stays above 55°F. Apply when soil reaches 50°F, before that happens. | Feb 4 – Feb 26 |
| FertilizerFeed after green-up once soil stays above 65°F; stop about 6 weeks before the first frost. | Mar 22 – Oct 25 |
| Seeding, sodding & pluggingWarm-season grass needs soil above 65°F and about 10 weeks to establish before frost. | Mar 22 – Sep 22 |
| Fall pre-emergent (winter weeds)Stops annual bluegrass (Poa annua) and winter weeds; apply as soil drops below 70°F. | Oct 18 – Nov 8 |
Median dates, 2016–2025, from NOAA weather data for Round Rock. This year's dates can differ by a few weeks.
Month-by-month lawn care in Round Rock
- JanuaryNo treatments due; mow as needed.
- FebruaryCrabgrass preventer (pre-emergent)
- MarchFertilizerSeeding, sodding & plugging
- AprilFertilizerSeeding, sodding & plugging
- MayFertilizerSeeding, sodding & plugging
- JuneFertilizerSeeding, sodding & plugging
- JulyFertilizerSeeding, sodding & plugging
- AugustFertilizerSeeding, sodding & plugging
- SeptemberFertilizerSeeding, sodding & plugging
- OctoberFertilizerFall pre-emergent (winter weeds)
- NovemberFall pre-emergent (winter weeds)
- DecemberNo treatments due; mow as needed.
Soil temperature in Round Rock by month
Average soil temperature 4 inches down, estimated from 2016–2025 weather. It bottoms out in January at 49°F and peaks in July at 85°F. Crabgrass preventer goes down when it reaches 50°F, usually around Feb 4.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 49°F | 52°F | 62°F | 67°F | 75°F | 82°F | 85°F | 85°F | 80°F | 71°F | 60°F | 53°F |
Round Rock lawn timing, year by year
Over the last 10 years, soil in Round Rock reached 50°F, the signal for crabgrass preventer, as early as Jan 8 (2019) and as late as Mar 4 (2022): 55 days apart. A fixed calendar date can't follow that, which is why the report above uses this year's soil temperature. Between the typical last spring frost (Feb 20) and first fall frost (Dec 6), the growing season lasts about 289 days.
| Year | Crabgrass window opened | Last spring frost | First fall frost |
|---|---|---|---|
| 2025 | Feb 26 | Feb 23 | Dec 15 |
| 2024 | Jan 29 | Feb 19 | Dec 11 |
| 2023 | Feb 7 | Feb 19 | Dec 11 |
| 2022 | Mar 4 | Mar 14 | Nov 13 |
| 2021 | Feb 25 | Feb 21 | Dec 12 |
| 2020 | Mar 1 | Mar 1 | Dec 1 |
| 2019 | Jan 8 | Mar 7 | Nov 1 |
| 2018 | Feb 1 | Feb 13 | Nov 14 |
| 2017 | Jan 11 | Jan 27 | Nov 23 |
| 2016 | Jan 30 | Feb 8 | Dec 9 |
Estimated from daily temperatures for Round Rock. A dash means it didn't happen that year.
Frequently asked questions
When should I apply pre-emergent in Round Rock?
In a typical year, between Feb 4 and Feb 26. Put it down when soil reaches 50°F, before it stays above 55°F and crabgrass starts sprouting. Early springs move this up by a week or more, so check this year's soil temperature above.
When is the best time to plant grass seed in Round Rock?
Once soil stays above 65°F, typically Mar 22 – Sep 22, leaving about 10 weeks before the first frost.
When is the last frost in Round Rock?
The median last spring frost is Feb 20 and the median first fall frost is Dec 6 (2016–2025).
How long is the growing season in Round Rock?
About 289 days, from the median last spring frost on Feb 20 to the median first fall frost on Dec 6 (2016–2025).
Lawn care guides
More Texas lawn calendars
Nearby cities in other states
- Lake Charles, LA 267 miles away · crabgrass preventer Feb 1 – Feb 16
- Shreveport, LA 270 miles away · crabgrass preventer Feb 6 – Mar 1
- Lawton, OK 286 miles away · crabgrass preventer Mar 1 – Mar 25
- Texarkana, AR 294 miles away · crabgrass preventer Feb 19 – Mar 13