San Jose, CA Lawn Care Calendar
In a typical year, put down crabgrass preventer in San Jose between Jan 28 and Mar 3. Frost is uncommon here. Most lawns here are cool-season grass (tall fescue, Kentucky bluegrass, ryegrass).
Typical lawn care dates in San Jose
| Task | Typical window |
|---|---|
| Crabgrass preventer (pre-emergent)Crabgrass sprouts once soil stays above 55°F. Apply when soil reaches 50°F, before that happens. | Jan 28 – Mar 3 |
| Spring fertilizerA light feeding once soil warms past 55°F and the grass is actively growing. | Feb 24 – Mar 31 |
| Overseeding & seedingLate summer to early fall: seedlings need about 6–10 weeks of growth before the first frost. | — |
| Fall fertilizerThe most important feeding for cool-season grass, from early fall until soil cools to about 45°F. | from Jul 26 |
Median dates, 2016–2025, from NOAA weather data for San Jose. This year's dates can differ by a few weeks.
Month-by-month lawn care in San Jose
- JanuaryCrabgrass preventer (pre-emergent)
- FebruaryCrabgrass preventer (pre-emergent)Spring fertilizer
- MarchCrabgrass preventer (pre-emergent)Spring fertilizer
- AprilNo treatments due; mow as needed.
- MayNo treatments due; mow as needed.
- JuneNo treatments due; mow as needed.
- JulyFall fertilizer
- AugustNo treatments due; mow as needed.
- SeptemberNo treatments due; mow as needed.
- OctoberNo treatments due; mow as needed.
- NovemberNo treatments due; mow as needed.
- DecemberNo treatments due; mow as needed.
Soil temperature in San Jose by month
Average soil temperature 4 inches down, estimated from 2016–2025 weather. It bottoms out in January at 52°F and peaks in August at 71°F. Crabgrass preventer goes down when it reaches 50°F, usually around Jan 28.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 52°F | 53°F | 55°F | 59°F | 63°F | 68°F | 70°F | 71°F | 70°F | 66°F | 57°F | 52°F |
San Jose lawn timing, year by year
Over the last 10 years, soil in San Jose reached 50°F, the signal for crabgrass preventer, as early as Jan 6 (2022) and as late as Mar 12 (2023): 65 days apart. A fixed calendar date can't follow that, which is why the report above uses this year's soil temperature.
| Year | Crabgrass window opened | Last spring frost | First fall frost |
|---|---|---|---|
| 2025 | Feb 16 | — | — |
| 2024 | Jan 15 | — | — |
| 2023 | Mar 12 | — | — |
| 2022 | Jan 6 | Feb 25 | — |
| 2021 | Feb 1 | Jan 27 | — |
| 2020 | Jan 23 | — | — |
| 2019 | Feb 27 | — | — |
| 2018 | Mar 7 | — | — |
| 2017 | Jan 9 | Jan 7 | — |
| 2016 | Jan 11 | — | Dec 19 |
Estimated from daily temperatures for San Jose. A dash means it didn't happen that year.
Growing warm-season grass in San Jose?
| Task | Typical window |
|---|---|
| Crabgrass preventer (pre-emergent) | Jan 28 – Mar 3 |
| Fertilizer | May 31 – Jul 3 |
| Seeding, sodding & plugging | May 31 – Jul 1 |
| Fall pre-emergent (winter weeds) | Jul 3 – Jul 24 |
Frequently asked questions
When should I apply pre-emergent in San Jose?
In a typical year, between Jan 28 and Mar 3. 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 San Jose?
It depends on your grass type and this year’s soil temperature.
When is the last frost in San Jose?
Frost does not occur in most years in San Jose.
How long is the growing season in San Jose?
Frost is uncommon in San Jose, so cool spells rather than freezes set the length of the season.
Lawn care guides
More California lawn calendars
Nearby cities in other states
- Reno, NV 189 miles away · crabgrass preventer Apr 7 – May 4
- Medford, OR 349 miles away · crabgrass preventer Apr 2 – May 3
- Las Vegas, NV 382 miles away · crabgrass preventer Feb 3 – Feb 17
- Henderson, NV 393 miles away · crabgrass preventer Feb 3 – Feb 22