Fall in zone 6bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 96058 (Mount Hebron, 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, Lava Beds Nat Mon, CA (21 miles away).
- Average last spring frostJun 650% chance of a 32°F freeze after this date
- Average first fall frostSep 2850% chance of a 32°F freeze by this date
- Growing season (frost-free)113 daysmedian, 32°F threshold
- USDA hardiness zone6b-5 to 0°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 96058 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 March to April.
Fertilizer window
Lawn region: Pacific Northwest (west of the Cascades). Timing only; always follow the product label.
- Perennial ryegrass (cool-season): Early fall: September; Late fall: October–November; Overseeded Bermuda: Light feeding once the winter rye is established, if needed. Avoid: Summer feeding.
Plant now
No vegetable planting windows are open this week.
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) | May 16 |
| 50% (the "average" last frost) | Jun 6 |
| 10% (cautious: only 1 year in 10 freezes later) | Jun 22 |
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) | Sep 8 |
| 50% (the "average" first frost) | Sep 28 |
| 90% (late: most years have frozen by now) | Oct 17 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Jun 19 | Sep 13 |
| 32°F (freeze) | Jun 6 | Sep 28 |
| 28°F (hard freeze) | May 16 | Oct 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 96058
Dates count from your average last spring frost (Jun 6) and first fall frost (Sep 28). 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 | Apr 11–25 | Jun 13–27 (transplant) | – |
| Pepper (sweet and hot) | Mar 28–Apr 11 | Jun 20–Jul 4 (transplant) | – |
| Eggplant | Mar 28–Apr 11 | Jun 20–Jul 4 (transplant) | – |
| Tomatillo | Apr 11–25 | Jun 13–27 (transplant) | – |
| Lettuce | Apr 11–25 | May 16–Jun 6 (transplant) May 9–Jun 20 (sow outdoors) | Aug 3–24 (transplant) Jul 20–Aug 17 (sowing) |
| Spinach | – | Apr 25–May 16 (sow outdoors) | Aug 3–24 (sowing) |
| Kale | Apr 11–25 | May 9–23 (transplant) May 9–23 (sow outdoors) | Jul 6–Aug 3 (transplant) Jun 22–Jul 20 (sowing) |
| Collards | Apr 11–25 | May 9–Jun 6 (transplant) May 9–Jun 6 (sow outdoors) | Jul 6–Aug 3 (transplant) Jun 22–Jul 20 (sowing) |
| Broccoli | Mar 28–Apr 11 | May 9–23 (transplant) | Jun 22–Jul 20 (transplant) |
| Cabbage | Mar 28–Apr 11 | May 9–23 (transplant) | Jun 22–Jul 20 (transplant) |
| Cauliflower | Mar 28–Apr 11 | May 23–Jun 6 (transplant) | Jun 22–Jul 20 (transplant) |
| Brussels sprouts | Mar 14–28 | May 9–23 (transplant) | Jun 8–29 (transplant) |
| Kohlrabi | Apr 11–25 | May 9–23 (transplant) May 9–23 (sow outdoors) | Jul 20–Aug 3 (sowing) |
| Bok choy / Asian greens | – | May 9–23 (sow outdoors) | Aug 3–17 (sowing) |
| Arugula | – | May 9–Jun 6 (sow outdoors) | Aug 3–31 (sowing) |
| Mustard greens | – | May 9–30 (sow outdoors) | Aug 3–17 (sowing) |
| Swiss chard | Apr 25–May 9 | May 23–Jun 13 (transplant) May 23–Jun 20 (sow outdoors) | Jul 20–Aug 3 (sowing) |
| Beet | – | May 9–Jun 6 (sow outdoors) | Jul 20–Aug 3 (sowing) |
| Carrot | – | May 16–Jun 13 (sow outdoors) | Jul 6–20 (sowing) |
| Radish | – | May 2–Jun 13 (sow outdoors) | Aug 17–31 (sowing) |
| Turnip | – | May 9–30 (sow outdoors) | Jul 20–Aug 3 (sowing) |
| Parsnip | – | May 16–Jun 6 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Apr 11–May 9 (sow outdoors) | Jul 6–20 (sowing) |
| Onion (bulbing) | Mar 14–28 | Apr 25–May 9 (transplant) | – |
| Green onion / scallion | – | Apr 25–May 23 (sow outdoors) | Jul 20–Aug 3 (sowing) |
| Leek | Mar 14–28 | May 9–23 (transplant) | – |
| Garlic | – | – | Aug 17–Sep 14 (sowing) |
| Shallot | – | Apr 25–May 9 (transplant) | Aug 17–Sep 14 (sowing) |
| Potato | – | May 9–23 (transplant) | Jun 8–22 (transplant) |
| Sweet potato | – | Jun 27–Jul 11 (transplant) | – |
| Sweet corn | – | Jun 13–27 (sow outdoors) | – |
| Bean, bush (snap) | – | Jun 13–27 (sow outdoors) | – |
| Bean, pole | – | Jun 13–27 (sow outdoors) | – |
| Lima bean | – | Jun 20–Jul 4 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 27–Jul 18 (sow outdoors) | – |
| Cucumber | May 9–16 | Jun 13–27 (transplant) Jun 13–27 (sow outdoors) | – |
| Summer squash / zucchini | May 9–16 | Jun 13–27 (transplant) Jun 13–27 (sow outdoors) | – |
| Winter squash | May 9–16 | Jun 13–27 (transplant) Jun 13–27 (sow outdoors) | – |
| Pumpkin | – | Jun 13–27 (sow outdoors) | – |
| Watermelon | May 9–16 | Jun 20–Jul 4 (transplant) Jun 20–Jul 4 (sow outdoors) | – |
| Cantaloupe / muskmelon | May 9–16 | Jun 20–Jul 4 (transplant) Jun 20–Jul 4 (sow outdoors) | – |
| Okra | Apr 25–May 9 | Jun 20–Jul 4 (transplant) Jun 20–Jul 4 (sow outdoors) | – |
| Celery | Mar 14–28 | Jun 13–20 (transplant) | – |
| Basil | Apr 25–May 9 | Jun 13–27 (transplant) Jun 13–27 (sow outdoors) | – |
| Cilantro | – | May 23–Jun 20 (sow outdoors) | Aug 3–17 (sowing) |
| Parsley | Mar 28–Apr 11 | May 23–Jun 6 (transplant) May 16–Jun 6 (sow outdoors) | – |
| Dill | – | Jun 6–20 (sow outdoors) | Aug 3–17 (sowing) |
| Sunflower | – | Jun 6–20 (sow outdoors) | – |
| Asparagus (crowns) | – | May 9–23 (transplant) | – |
| Rhubarb (crowns) | – | May 9–23 (transplant) | – |
| Strawberry (plants) | – | May 9–23 (transplant) | Jul 20–Aug 17 (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: Lava Beds Nat Mon, CA (NOAA GHCN-Daily ID USC00044838), elevation 4,770 ft, 21.0 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Keno, OR | 25 mi | Jun 5 | Sep 20 |
| Tulelake, CA | 27 mi | Jun 6 | Sep 14 |
| Copco #1 Dam, CA | 28 mi | May 4 | Oct 21 |
The average last-frost dates of these stations span 33 days, a rough guide to local variation. See data sources & methods.
Frost questions for 96058
When is the last frost in 96058?
The average (50% chance) last spring freeze of 32°F for ZIP 96058 is June 6. For a more cautious planting date, use June 22, when only 1 year in 10 still sees a later freeze.
When is the first frost in 96058?
The average first fall freeze is September 28. In 1 year in 10 it comes by September 8.
What hardiness zone is 96058?
ZIP 96058 is in USDA zone 6b (-5 to 0°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 96058 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
96023 Dorris 96064 Montague 96134 Newell 97627 Keno 96094 Weed 97633 Merrill 97634 97603 Altamont
Other ZIP codes in Siskiyou County
95568 96014 96023 96025 96027 96031 96032 96034 96037 96038 96039 96044 96050 96057 96064 96067 96085 96086 96094 96097 All Siskiyou 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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- Weekly yard to-dos
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.