Fall in zone 9bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 70380 (Morgan City, LA)
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, Morgan City, LA (6 miles away).
Freezes are uncommon here
NOAA's normals for this station show a 32°F night in about 80% of years (about 7 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 frostJan 3050% chance of a 32°F freeze after this date
- Average first fall frostJan 1 (next year)50% chance of a 32°F freeze by this date
- Growing season (frost-free)335 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
75°F 55°F or warmer
24-hour average · latest 73°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Lafayette 13 SE (52 mi).
4-inch depth
77°F 55°F or warmer
24-hour average · latest 77°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Lafayette 13 SE (52 mi).
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 70380 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 77°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent (annual bluegrass, winter weeds): not yet. Apply as soil cools toward 70°F (typically October to early November).
Fertilizer window
Lawn region: Gulf Coast and peninsular Florida. Timing only; always follow the product label.
- St. Augustinegrass (warm-season): Spring: About 2–3 weeks after full green-up (May in the Carolinas; earlier in Florida and south Texas) (about Mar 10 here, using green-up about 3–4 weeks after your average last frost); Summer: Light feedings June–August where local rules allow; Last: No later than about mid-September in the Carolinas, about 6–8 weeks before first frost elsewhere. Avoid: Feeding before green-up or late in fall (feeds weeds and favors large patch and cold injury).
Plant now
- Kale: fall sowing Sep 25–Oct 23
- Kale: fall transplant Oct 9–Nov 6
- Collards: fall sowing Sep 25–Oct 23
- Collards: fall transplant Oct 9–Nov 6
- Broccoli: fall transplant Sep 25–Oct 23
- Cabbage: fall transplant Sep 25–Oct 23
- Cauliflower: fall transplant Sep 25–Oct 23
- Carrot: fall sowing Oct 9–23
- Pea (garden, snap, snow): fall sowing Oct 9–23
- Bean, bush (snap): fall sowing Oct 9–23
- Cucumber: fall sowing Oct 9–23
- Summer squash / zucchini: fall sowing Oct 9–23
Coming up in the next 3 weeks
- Lettuce: fall sowing Oct 23–Nov 20
- Lettuce: fall transplant Nov 6–27
- Spinach: fall sowing Nov 6–27
- Brussels sprouts: start seeds indoors Nov 7–21
- Kohlrabi: fall sowing Oct 23–Nov 6
- Bok choy / Asian greens: fall sowing Nov 6–20
- Arugula: fall sowing Nov 6–Dec 4
- Mustard greens: fall sowing Nov 6–20
- Swiss chard: fall sowing Oct 23–Nov 6
- Beet: fall sowing Oct 23–Nov 6
- Turnip: fall sowing Oct 23–Nov 6
- Onion (bulbing): start seeds indoors Nov 7–21
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 30 (prior Dec) |
| 50% (the "average" last frost) | Jan 30 |
| 10% (cautious: only 1 year in 10 freezes later) | Mar 5 |
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 2 |
| 50% (the "average" first frost) | Jan 1 (next year) |
| 90% (late: most years have frozen by now) | Feb 2 (next year) |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Feb 15 | Dec 14 |
| 32°F (freeze) | Jan 30 | Jan 1 (next year) |
| 28°F (hard freeze) | Jan 22 | Jan 6 (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 70380
Dates count from your average last spring frost (Jan 30) and first fall frost (Jan 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 5–19 | Feb 6–20 (transplant) | Sep 4–Oct 2 (transplant) |
| Pepper (sweet and hot) | Nov 21–Dec 5 | Feb 13–27 (transplant) | Sep 11–Oct 2 (transplant) |
| Eggplant | Nov 21–Dec 5 | Feb 13–27 (transplant) | Sep 11–Oct 2 (transplant) |
| Tomatillo | Dec 5–19 | Feb 6–20 (transplant) | – |
| Lettuce | Dec 5–19 | Jan 9–30 (transplant) Jan 2–Feb 13 (sow outdoors) | Nov 6–27 (transplant) Oct 23–Nov 20 (sowing) |
| Spinach | – | Dec 19–Jan 9 (sow outdoors) | Nov 6–27 (sowing) |
| Kale | Dec 5–19 | Jan 2–16 (transplant) Jan 2–16 (sow outdoors) | Oct 9–Nov 6 (transplant) Sep 25–Oct 23 (sowing) |
| Collards | Dec 5–19 | Jan 2–30 (transplant) Jan 2–30 (sow outdoors) | Oct 9–Nov 6 (transplant) Sep 25–Oct 23 (sowing) |
| Broccoli | Nov 21–Dec 5 | Jan 2–16 (transplant) | Sep 25–Oct 23 (transplant) |
| Cabbage | Nov 21–Dec 5 | Jan 2–16 (transplant) | Sep 25–Oct 23 (transplant) |
| Cauliflower | Nov 21–Dec 5 | Jan 16–30 (transplant) | Sep 25–Oct 23 (transplant) |
| Brussels sprouts | Nov 7–21 | Jan 2–16 (transplant) | Sep 11–Oct 2 (transplant) |
| Kohlrabi | Dec 5–19 | Jan 2–16 (transplant) Jan 2–16 (sow outdoors) | Oct 23–Nov 6 (sowing) |
| Bok choy / Asian greens | – | Jan 2–16 (sow outdoors) | Nov 6–20 (sowing) |
| Arugula | – | Jan 2–30 (sow outdoors) | Nov 6–Dec 4 (sowing) |
| Mustard greens | – | Jan 2–23 (sow outdoors) | Nov 6–20 (sowing) |
| Swiss chard | Dec 19–Jan 2 | Jan 16–Feb 6 (transplant) Jan 16–Feb 13 (sow outdoors) | Oct 23–Nov 6 (sowing) |
| Beet | – | Jan 2–30 (sow outdoors) | Oct 23–Nov 6 (sowing) |
| Carrot | – | Jan 9–Feb 6 (sow outdoors) | Oct 9–23 (sowing) |
| Radish | – | Dec 26–Feb 6 (sow outdoors) | Nov 20–Dec 4 (sowing) |
| Turnip | – | Jan 2–23 (sow outdoors) | Oct 23–Nov 6 (sowing) |
| Parsnip | – | Jan 9–30 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 5–Jan 2 (sow outdoors) | Oct 9–23 (sowing) |
| Onion (bulbing) | Nov 7–21 | Dec 19–Jan 2 (transplant) | – |
| Green onion / scallion | – | Dec 19–Jan 16 (sow outdoors) | Oct 23–Nov 6 (sowing) |
| Leek | Nov 7–21 | Jan 2–16 (transplant) | – |
| Garlic | – | – | Nov 20–Dec 18 (sowing) |
| Shallot | – | Dec 19–Jan 2 (transplant) | Nov 20–Dec 18 (sowing) |
| Potato | – | Jan 2–16 (transplant) | Sep 11–25 (transplant) |
| Sweet potato | – | Feb 20–Mar 6 (transplant) | – |
| Sweet corn | – | Feb 6–20 (sow outdoors) | – |
| Bean, bush (snap) | – | Feb 6–20 (sow outdoors) | Oct 9–23 (sowing) |
| Bean, pole | – | Feb 6–20 (sow outdoors) | – |
| Lima bean | – | Feb 13–27 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Feb 20–Mar 13 (sow outdoors) | – |
| Cucumber | Jan 2–9 | Feb 6–20 (transplant) Feb 6–20 (sow outdoors) | Oct 9–23 (sowing) |
| Summer squash / zucchini | Jan 2–9 | Feb 6–20 (transplant) Feb 6–20 (sow outdoors) | Oct 9–23 (sowing) |
| Winter squash | Jan 2–9 | Feb 6–20 (transplant) Feb 6–20 (sow outdoors) | – |
| Pumpkin | – | Feb 6–20 (sow outdoors) | – |
| Watermelon | Jan 2–9 | Feb 13–27 (transplant) Feb 13–27 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 2–9 | Feb 13–27 (transplant) Feb 13–27 (sow outdoors) | – |
| Okra | Dec 19–Jan 2 | Feb 13–27 (transplant) Feb 13–27 (sow outdoors) | – |
| Celery | Nov 7–21 | Feb 6–13 (transplant) | – |
| Basil | Dec 19–Jan 2 | Feb 6–20 (transplant) Feb 6–20 (sow outdoors) | – |
| Cilantro | – | Jan 16–Feb 13 (sow outdoors) | Nov 6–20 (sowing) |
| Parsley | Nov 21–Dec 5 | Jan 16–30 (transplant) Jan 9–30 (sow outdoors) | – |
| Dill | – | Jan 30–Feb 13 (sow outdoors) | Nov 6–20 (sowing) |
| Sunflower | – | Jan 30–Feb 13 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 2–16 (transplant) | – |
| Rhubarb (crowns) | – | Jan 2–16 (transplant) | – |
| Strawberry (plants) | – | Jan 2–16 (transplant) | Oct 23–Nov 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.
Plants that do well here
Louisiana has a university or garden plant program: Louisiana Super Plants. Plant frost-tender annuals after January 30 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Morgan City, LA (NOAA GHCN-Daily ID USC00166394), elevation 5 ft, 6.5 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Houma, LA | 19 mi | Feb 5 | Dec 17 |
| Thibodaux 4 SE, LA | 20 mi | Feb 5 | Dec 14 |
| Donaldsonville 4 SW, LA | 23 mi | Feb 21 | Dec 5 |
The average last-frost dates of these stations span 22 days, a rough guide to local variation. See data sources & methods.
Frost questions for 70380
When is the last frost in 70380?
The average (50% chance) last spring freeze of 32°F for ZIP 70380 is January 30. For a more cautious planting date, use March 5, when only 1 year in 10 still sees a later freeze.
When is the first frost in 70380?
The average first fall freeze is January 1 (next year). In 1 year in 10 it comes by December 2.
What hardiness zone is 70380?
ZIP 70380 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 70380 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
70340 Amelia 70372 Labadieville 70342 Berwick 70390 Supreme 70352 70356 70339 Pierre Part 70392 Patterson
Other ZIP codes in Assumption Parish
70339 70341 70372 70390 70391 70393 All Assumption Parish frost dates · Louisiana frost dates
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- 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.