Fall in zone 9bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 95421 (Cazadero, 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, Ft Ross, CA (6 miles away).
Freezes are uncommon here
NOAA's normals for this station show a 32°F night in about 87% of years (about 12 freezing night(s) a year on average). The dates below describe freeze timing for the station's record; in many years there may be no 32°F freeze at all.
- Average last spring frostFeb 2650% chance of a 32°F freeze after this date
- Average first fall frostDec 2750% chance of a 32°F freeze by this date
- Growing season (frost-free)310 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
Freezes are uncommon here, so frost-based timing is rough. Local extension calendars for frost-free areas use months.
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 95421 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 13 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 Oct 18–Nov 15
- Kale: fall sowing Sep 20–Oct 18
- Kale: fall transplant Oct 4–Nov 1
- Collards: fall sowing Sep 20–Oct 18
- Collards: fall transplant Oct 4–Nov 1
- Broccoli: fall transplant Sep 20–Oct 18
- Cabbage: fall transplant Sep 20–Oct 18
- Cauliflower: fall transplant Sep 20–Oct 18
- Kohlrabi: fall sowing Oct 18–Nov 1
- Swiss chard: fall sowing Oct 18–Nov 1
- Beet: fall sowing Oct 18–Nov 1
- Carrot: fall sowing Oct 4–18
- Turnip: fall sowing Oct 18–Nov 1
- Pea (garden, snap, snow): fall sowing Oct 4–18
- Green onion / scallion: fall sowing Oct 18–Nov 1
- Bean, bush (snap): fall sowing Oct 4–18
- Cucumber: fall sowing Oct 4–18
- Summer squash / zucchini: fall sowing Oct 4–18
- Strawberry (plants): fall transplant Oct 18–Nov 15
Coming up in the next 3 weeks
- Lettuce: fall transplant Nov 1–22
- Spinach: fall sowing Nov 1–22
- Bok choy / Asian greens: fall sowing Nov 1–15
- Arugula: fall sowing Nov 1–29
- Mustard greens: fall sowing Nov 1–15
- Cilantro: fall sowing Nov 1–15
- Dill: fall sowing Nov 1–15
Prune now
No frost-timed pruning windows are open this week.
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) | Dec 27 (prior Dec) |
| 50% (the "average" last frost) | Feb 26 |
| 10% (cautious: only 1 year in 10 freezes later) | May 1 |
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) | Dec 1 |
| 50% (the "average" first frost) | Dec 27 |
| 90% (late: most years have frozen by now) | Feb 27 (next year) |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 17 | Nov 25 |
| 32°F (freeze) | Feb 26 | Dec 27 |
| 28°F (hard freeze) | Jan 29 | Jan 16 (next year) |
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 95421
Dates count from your average last spring frost (Feb 26) and first fall frost (Dec 27). 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 | Jan 1–15 | Mar 5–19 (transplant) | Aug 30–Sep 27 (transplant) |
| Pepper (sweet and hot) | Dec 18–Jan 1 | Mar 12–26 (transplant) | Sep 6–27 (transplant) |
| Eggplant | Dec 18–Jan 1 | Mar 12–26 (transplant) | Sep 6–27 (transplant) |
| Tomatillo | Jan 1–15 | Mar 5–19 (transplant) | – |
| Lettuce | Jan 1–15 | Feb 5–26 (transplant) Jan 29–Mar 12 (sow outdoors) | Nov 1–22 (transplant) Oct 18–Nov 15 (sowing) |
| Spinach | – | Jan 15–Feb 5 (sow outdoors) | Nov 1–22 (sowing) |
| Kale | Jan 1–15 | Jan 29–Feb 12 (transplant) Jan 29–Feb 12 (sow outdoors) | Oct 4–Nov 1 (transplant) Sep 20–Oct 18 (sowing) |
| Collards | Jan 1–15 | Jan 29–Feb 26 (transplant) Jan 29–Feb 26 (sow outdoors) | Oct 4–Nov 1 (transplant) Sep 20–Oct 18 (sowing) |
| Broccoli | Dec 18–Jan 1 | Jan 29–Feb 12 (transplant) | Sep 20–Oct 18 (transplant) |
| Cabbage | Dec 18–Jan 1 | Jan 29–Feb 12 (transplant) | Sep 20–Oct 18 (transplant) |
| Cauliflower | Dec 18–Jan 1 | Feb 12–26 (transplant) | Sep 20–Oct 18 (transplant) |
| Brussels sprouts | Dec 4–18 | Jan 29–Feb 12 (transplant) | Sep 6–27 (transplant) |
| Kohlrabi | Jan 1–15 | Jan 29–Feb 12 (transplant) Jan 29–Feb 12 (sow outdoors) | Oct 18–Nov 1 (sowing) |
| Bok choy / Asian greens | – | Jan 29–Feb 12 (sow outdoors) | Nov 1–15 (sowing) |
| Arugula | – | Jan 29–Feb 26 (sow outdoors) | Nov 1–29 (sowing) |
| Mustard greens | – | Jan 29–Feb 19 (sow outdoors) | Nov 1–15 (sowing) |
| Swiss chard | Jan 15–29 | Feb 12–Mar 5 (transplant) Feb 12–Mar 12 (sow outdoors) | Oct 18–Nov 1 (sowing) |
| Beet | – | Jan 29–Feb 26 (sow outdoors) | Oct 18–Nov 1 (sowing) |
| Carrot | – | Feb 5–Mar 5 (sow outdoors) | Oct 4–18 (sowing) |
| Radish | – | Jan 22–Mar 5 (sow outdoors) | Nov 15–29 (sowing) |
| Turnip | – | Jan 29–Feb 19 (sow outdoors) | Oct 18–Nov 1 (sowing) |
| Parsnip | – | Feb 5–26 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Jan 1–29 (sow outdoors) | Oct 4–18 (sowing) |
| Onion (bulbing) | Dec 4–18 | Jan 15–29 (transplant) | – |
| Green onion / scallion | – | Jan 15–Feb 12 (sow outdoors) | Oct 18–Nov 1 (sowing) |
| Leek | Dec 4–18 | Jan 29–Feb 12 (transplant) | – |
| Garlic | – | – | Nov 15–Dec 13 (sowing) |
| Shallot | – | Jan 15–29 (transplant) | Nov 15–Dec 13 (sowing) |
| Potato | – | Jan 29–Feb 12 (transplant) | Sep 6–20 (transplant) |
| Sweet potato | – | Mar 19–Apr 2 (transplant) | – |
| Sweet corn | – | Mar 5–19 (sow outdoors) | – |
| Bean, bush (snap) | – | Mar 5–19 (sow outdoors) | Oct 4–18 (sowing) |
| Bean, pole | – | Mar 5–19 (sow outdoors) | – |
| Lima bean | – | Mar 12–26 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Mar 19–Apr 9 (sow outdoors) | – |
| Cucumber | Jan 29–Feb 5 | Mar 5–19 (transplant) Mar 5–19 (sow outdoors) | Oct 4–18 (sowing) |
| Summer squash / zucchini | Jan 29–Feb 5 | Mar 5–19 (transplant) Mar 5–19 (sow outdoors) | Oct 4–18 (sowing) |
| Winter squash | Jan 29–Feb 5 | Mar 5–19 (transplant) Mar 5–19 (sow outdoors) | – |
| Pumpkin | – | Mar 5–19 (sow outdoors) | – |
| Watermelon | Jan 29–Feb 5 | Mar 12–26 (transplant) Mar 12–26 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 29–Feb 5 | Mar 12–26 (transplant) Mar 12–26 (sow outdoors) | – |
| Okra | Jan 15–29 | Mar 12–26 (transplant) Mar 12–26 (sow outdoors) | – |
| Celery | Dec 4–18 | Mar 5–12 (transplant) | – |
| Basil | Jan 15–29 | Mar 5–19 (transplant) Mar 5–19 (sow outdoors) | – |
| Cilantro | – | Feb 12–Mar 12 (sow outdoors) | Nov 1–15 (sowing) |
| Parsley | Dec 18–Jan 1 | Feb 12–26 (transplant) Feb 5–26 (sow outdoors) | – |
| Dill | – | Feb 26–Mar 12 (sow outdoors) | Nov 1–15 (sowing) |
| Sunflower | – | Feb 26–Mar 12 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 29–Feb 12 (transplant) | – |
| Rhubarb (crowns) | – | Jan 29–Feb 12 (transplant) | – |
| Strawberry (plants) | – | Jan 29–Feb 12 (transplant) | Oct 18–Nov 15 (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: Ft Ross, CA (NOAA GHCN-Daily ID USC00043191), elevation 112 ft, 5.8 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Cloverdale, CA | 17 mi | Feb 25 | Dec 3 |
| Healdsburg, CA | 17 mi | Feb 15 | Dec 2 |
| Occidental, CA | 18 mi | Jan 29 | Dec 30 |
The average last-frost dates of these stations span 28 days, a rough guide to local variation. See data sources & methods.
Frost questions for 95421
When is the last frost in 95421?
The average (50% chance) last spring freeze of 32°F for ZIP 95421 is February 26. For a more cautious planting date, use May 1, when only 1 year in 10 still sees a later freeze.
When is the first frost in 95421?
The average first fall freeze is December 27. In 1 year in 10 it comes by December 1.
What hardiness zone is 95421?
ZIP 95421 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 95421 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
95450 Timber Cove 95446 Guerneville 95430 95412 95486 Monte Rio 95462 Monte Rio 95471 Guerneville 95441 Geyserville
Other ZIP codes in Sonoma County
94515 94922 94923 94928 94931 94951 94954 94972 95401 95403 95404 95405 95407 95409 95412 95419 95425 95430 95431 95436 95439 95441 95442 95444 All Sonoma County frost dates · California frost dates
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- 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.