Fall in zone 9bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 95950 (Grimes, CA)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Colusa 2 SSW, CA (12 miles away).
- Average last spring frostFeb 1450% chance of a 32°F freeze after this date
- Average first fall frostDec 150% chance of a 32°F freeze by this date
- Growing season (frost-free)293 daysmedian, 32°F threshold
- USDA hardiness zone9b25 to 30°F avg. coldest night
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This week in your yard
As of Oct 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
No soil station with a fresh reading within 62 miles.
4-inch depth
No soil station with a fresh reading within 62 miles.
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
The latest National Weather Service 7-day forecast and any Frost Advisory or Freeze Warning for 95950 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
No soil reading near this ZIP. Typical extension timing for your region: spring February to March; fall September to October.
Fertilizer window
Lawn region: California coastal and valleys. Timing only; always follow the product label.
- Bermudagrass (warm-season): Spring: Several weeks after the lawn is fully green (April–May) (about Apr 1 here, using green-up about 3–4 weeks after your average last frost); Summer: Every 4–6 weeks through mid-August (heaviest feeder of the group); Late: Light, low-nitrogen/high-potassium feeding about 4 weeks before first frost, or skip. Avoid: Heavy late-fall nitrogen (linked to spring dead spot).
- Tall fescue (cool-season): Early fall: September (main feeding); Late fall: November, while still green; Late winter: Optional light feeding February–March. Avoid: Feeding after mid-spring and through summer in the transition zone (stress and brown patch).
Plant now
- Lettuce: fall sowing Sep 22–Oct 20
- Lettuce: fall transplant Oct 6–27
- Spinach: fall sowing Oct 6–27
- Bok choy / Asian greens: fall sowing Oct 6–20
- Arugula: fall sowing Oct 6–Nov 3
- Mustard greens: fall sowing Oct 6–20
- Cilantro: fall sowing Oct 6–20
- Dill: fall sowing Oct 6–20
- Strawberry (plants): fall transplant Sep 22–Oct 20
Coming up in the next 3 weeks
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Dec 1: skip heavy pruning in the 6–8 weeks before it, because new growth may not harden off in time.
Spring-flowering shrubs are pruned right after their flowers fade, not by date. See the pruning guide.
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | Jan 2 |
| 50% (the "average" last frost) | Feb 14 |
| 10% (cautious: only 1 year in 10 freezes later) | Mar 31 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Nov 11 |
| 50% (the "average" first frost) | Dec 1 |
| 90% (late: most years have frozen by now) | Dec 26 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Mar 31 | Nov 12 |
| 32°F (freeze) | Feb 14 | Dec 1 |
| 28°F (hard freeze) | Jan 8 | Dec 15 |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
Vegetable planting calendar for 95950
Dates count from your average last spring frost (Feb 14) and first fall frost (Dec 1). Half of years have a frost after the spring date, so give tender crops (tomatoes, peppers, squash) some slack.
| Crop | Start indoors | Spring planting | Fall planting |
|---|---|---|---|
| Tomato | Dec 20–Jan 3 | Feb 21–Mar 7 (transplant) | Aug 4–Sep 1 (transplant) |
| Pepper (sweet and hot) | Dec 6–20 | Feb 28–Mar 14 (transplant) | Aug 11–Sep 1 (transplant) |
| Eggplant | Dec 6–20 | Feb 28–Mar 14 (transplant) | Aug 11–Sep 1 (transplant) |
| Tomatillo | Dec 20–Jan 3 | Feb 21–Mar 7 (transplant) | – |
| Lettuce | Dec 20–Jan 3 | Jan 24–Feb 14 (transplant) Jan 17–Feb 28 (sow outdoors) | Oct 6–27 (transplant) Sep 22–Oct 20 (sowing) |
| Spinach | – | Jan 3–24 (sow outdoors) | Oct 6–27 (sowing) |
| Kale | Dec 20–Jan 3 | Jan 17–31 (transplant) Jan 17–31 (sow outdoors) | Sep 8–Oct 6 (transplant) Aug 25–Sep 22 (sowing) |
| Collards | Dec 20–Jan 3 | Jan 17–Feb 14 (transplant) Jan 17–Feb 14 (sow outdoors) | Sep 8–Oct 6 (transplant) Aug 25–Sep 22 (sowing) |
| Broccoli | Dec 6–20 | Jan 17–31 (transplant) | Aug 25–Sep 22 (transplant) |
| Cabbage | Dec 6–20 | Jan 17–31 (transplant) | Aug 25–Sep 22 (transplant) |
| Cauliflower | Dec 6–20 | Jan 31–Feb 14 (transplant) | Aug 25–Sep 22 (transplant) |
| Brussels sprouts | Nov 22–Dec 6 | Jan 17–31 (transplant) | Aug 11–Sep 1 (transplant) |
| Kohlrabi | Dec 20–Jan 3 | Jan 17–31 (transplant) Jan 17–31 (sow outdoors) | Sep 22–Oct 6 (sowing) |
| Bok choy / Asian greens | – | Jan 17–31 (sow outdoors) | Oct 6–20 (sowing) |
| Arugula | – | Jan 17–Feb 14 (sow outdoors) | Oct 6–Nov 3 (sowing) |
| Mustard greens | – | Jan 17–Feb 7 (sow outdoors) | Oct 6–20 (sowing) |
| Swiss chard | Jan 3–17 | Jan 31–Feb 21 (transplant) Jan 31–Feb 28 (sow outdoors) | Sep 22–Oct 6 (sowing) |
| Beet | – | Jan 17–Feb 14 (sow outdoors) | Sep 22–Oct 6 (sowing) |
| Carrot | – | Jan 24–Feb 21 (sow outdoors) | Sep 8–22 (sowing) |
| Radish | – | Jan 10–Feb 21 (sow outdoors) | Oct 20–Nov 3 (sowing) |
| Turnip | – | Jan 17–Feb 7 (sow outdoors) | Sep 22–Oct 6 (sowing) |
| Parsnip | – | Jan 24–Feb 14 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 20–Jan 17 (sow outdoors) | Sep 8–22 (sowing) |
| Onion (bulbing) | Nov 22–Dec 6 | Jan 3–17 (transplant) | – |
| Green onion / scallion | – | Jan 3–31 (sow outdoors) | Sep 22–Oct 6 (sowing) |
| Leek | Nov 22–Dec 6 | Jan 17–31 (transplant) | – |
| Garlic | – | – | Oct 20–Nov 17 (sowing) |
| Shallot | – | Jan 3–17 (transplant) | Oct 20–Nov 17 (sowing) |
| Potato | – | Jan 17–31 (transplant) | Aug 11–25 (transplant) |
| Sweet potato | – | Mar 7–21 (transplant) | – |
| Sweet corn | – | Feb 21–Mar 7 (sow outdoors) | – |
| Bean, bush (snap) | – | Feb 21–Mar 7 (sow outdoors) | Sep 8–22 (sowing) |
| Bean, pole | – | Feb 21–Mar 7 (sow outdoors) | – |
| Lima bean | – | Feb 28–Mar 14 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Mar 7–28 (sow outdoors) | – |
| Cucumber | Jan 17–24 | Feb 21–Mar 7 (transplant) Feb 21–Mar 7 (sow outdoors) | Sep 8–22 (sowing) |
| Summer squash / zucchini | Jan 17–24 | Feb 21–Mar 7 (transplant) Feb 21–Mar 7 (sow outdoors) | Sep 8–22 (sowing) |
| Winter squash | Jan 17–24 | Feb 21–Mar 7 (transplant) Feb 21–Mar 7 (sow outdoors) | – |
| Pumpkin | – | Feb 21–Mar 7 (sow outdoors) | – |
| Watermelon | Jan 17–24 | Feb 28–Mar 14 (transplant) Feb 28–Mar 14 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 17–24 | Feb 28–Mar 14 (transplant) Feb 28–Mar 14 (sow outdoors) | – |
| Okra | Jan 3–17 | Feb 28–Mar 14 (transplant) Feb 28–Mar 14 (sow outdoors) | – |
| Celery | Nov 22–Dec 6 | Feb 21–28 (transplant) | – |
| Basil | Jan 3–17 | Feb 21–Mar 7 (transplant) Feb 21–Mar 7 (sow outdoors) | – |
| Cilantro | – | Jan 31–Feb 28 (sow outdoors) | Oct 6–20 (sowing) |
| Parsley | Dec 6–20 | Jan 31–Feb 14 (transplant) Jan 24–Feb 14 (sow outdoors) | – |
| Dill | – | Feb 14–28 (sow outdoors) | Oct 6–20 (sowing) |
| Sunflower | – | Feb 14–28 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 17–31 (transplant) | – |
| Rhubarb (crowns) | – | Jan 17–31 (transplant) | – |
| Strawberry (plants) | – | Jan 17–31 (transplant) | Sep 22–Oct 20 (transplant) |
Typical ranges from university extension planting calendars, adjusted to your frost dates. Probabilities, not guarantees. Fall windows that would overlap spring planting are left out, as are fall crops of frost-tender plants where the frost-free season is under 210 days.
Where these numbers come from
Station: Colusa 2 SSW, CA (NOAA GHCN-Daily ID USC00041948), elevation 50 ft, 11.6 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Marysville, CA | 19 mi | Jan 15 | Dec 12 |
| Marysville Yuba Co AP, CA | 19 mi | Feb 11 | Nov 30 |
| Woodland 1 WNW, CA | 26 mi | Feb 7 | Dec 5 |
The average last-frost dates of these stations span 30 days, a rough guide to local variation. See data sources & methods.
Frost questions for 95950
When is the last frost in 95950?
The average (50% chance) last spring freeze of 32°F for ZIP 95950 is February 14. For a more cautious planting date, use March 31, when only 1 year in 10 still sees a later freeze.
When is the first frost in 95950?
The average first fall freeze is December 1. In 1 year in 10 it comes by November 11.
What hardiness zone is 95950?
ZIP 95950 is in USDA zone 9b (25 to 30°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 95950 right now?
This page shows the latest 2-inch and 4-inch soil temperature from the nearest public soil station (USDA SCAN, NOAA USCRN or TexMesonet), or a labeled estimate when no station is close, against the 50–55°F spring pre-emergent band.
Nearby ZIP codes
95957 Meridian 95912 College City 95982 Sutter 95937 Dunnigan 95645 Robbins 95993 Yuba City 95932 Colusa 95698
Other ZIP codes in Colusa County
95912 95932 95955 95970 95979 95987 All Colusa County frost dates · California frost dates
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Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
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Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.