Fall in zone 10bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 34997 (Port Salerno, FL)
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, Port Salerno 5W, FL (3 miles away).
Freezes are uncommon here
NOAA's normals for this station show a 32°F night in about 33% of years (about 1 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 2650% chance of a 32°F freeze after this date
- Average first fall frostJan 15 (next year)50% chance of a 32°F freeze by this date
- Growing season (frost-free)year-round in a typical yearmedian, 32°F threshold
- USDA hardiness zone10b35 to 40°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 34997 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 late January to mid-February (south Florida: earlier; check local soil temps); fall 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 6 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 Oct 9–Nov 6
- Collards: fall sowing Oct 9–Nov 6
- Broccoli: fall transplant Oct 9–Nov 6
- Cabbage: fall transplant Oct 9–Nov 6
- Cauliflower: fall transplant Oct 9–Nov 6
Coming up in the next 3 weeks
- Lettuce: fall sowing Nov 6–Dec 4
- Kale: fall transplant Oct 23–Nov 20
- Collards: fall transplant Oct 23–Nov 20
- Brussels sprouts: start seeds indoors Nov 3–17
- Kohlrabi: fall sowing Nov 6–20
- Swiss chard: fall sowing Nov 6–20
- Beet: fall sowing Nov 6–20
- Carrot: fall sowing Oct 23–Nov 6
- Turnip: fall sowing Nov 6–20
- Pea (garden, snap, snow): fall sowing Oct 23–Nov 6
- Onion (bulbing): start seeds indoors Nov 3–17
- Green onion / scallion: fall sowing Nov 6–20
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) | Jan 1 |
| 50% (the "average" last frost) | Jan 26 |
| 10% (cautious: only 1 year in 10 freezes later) | Feb 18 |
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 26 |
| 50% (the "average" first frost) | Jan 15 (next year) |
| 90% (late: most years have frozen by now) | Feb 10 (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 3 | Jan 12 (next year) |
| 32°F (freeze) | Jan 26 | Jan 15 (next year) |
| 28°F (hard freeze) | n/a | n/a |
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 34997
Dates count from your average last spring frost (Jan 26) and first fall frost (Jan 15). 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 1–15 | Feb 2–16 (transplant) | Sep 18–Oct 16 (transplant) |
| Pepper (sweet and hot) | Nov 17–Dec 1 | Feb 9–23 (transplant) | Sep 25–Oct 16 (transplant) |
| Eggplant | Nov 17–Dec 1 | Feb 9–23 (transplant) | Sep 25–Oct 16 (transplant) |
| Tomatillo | Dec 1–15 | Feb 2–16 (transplant) | – |
| Lettuce | Dec 1–15 | Jan 5–26 (transplant) Dec 29–Feb 9 (sow outdoors) | Nov 20–Dec 11 (transplant) Nov 6–Dec 4 (sowing) |
| Spinach | – | Dec 15–Jan 5 (sow outdoors) | Nov 20–Dec 11 (sowing) |
| Kale | Dec 1–15 | Dec 29–Jan 12 (transplant) Dec 29–Jan 12 (sow outdoors) | Oct 23–Nov 20 (transplant) Oct 9–Nov 6 (sowing) |
| Collards | Dec 1–15 | Dec 29–Jan 26 (transplant) Dec 29–Jan 26 (sow outdoors) | Oct 23–Nov 20 (transplant) Oct 9–Nov 6 (sowing) |
| Broccoli | Nov 17–Dec 1 | Dec 29–Jan 12 (transplant) | Oct 9–Nov 6 (transplant) |
| Cabbage | Nov 17–Dec 1 | Dec 29–Jan 12 (transplant) | Oct 9–Nov 6 (transplant) |
| Cauliflower | Nov 17–Dec 1 | Jan 12–26 (transplant) | Oct 9–Nov 6 (transplant) |
| Brussels sprouts | Nov 3–17 | Dec 29–Jan 12 (transplant) | Sep 25–Oct 16 (transplant) |
| Kohlrabi | Dec 1–15 | Dec 29–Jan 12 (transplant) Dec 29–Jan 12 (sow outdoors) | Nov 6–20 (sowing) |
| Bok choy / Asian greens | – | Dec 29–Jan 12 (sow outdoors) | Nov 20–Dec 4 (sowing) |
| Arugula | – | Dec 29–Jan 26 (sow outdoors) | Nov 20–Dec 18 (sowing) |
| Mustard greens | – | Dec 29–Jan 19 (sow outdoors) | Nov 20–Dec 4 (sowing) |
| Swiss chard | Dec 15–29 | Jan 12–Feb 2 (transplant) Jan 12–Feb 9 (sow outdoors) | Nov 6–20 (sowing) |
| Beet | – | Dec 29–Jan 26 (sow outdoors) | Nov 6–20 (sowing) |
| Carrot | – | Jan 5–Feb 2 (sow outdoors) | Oct 23–Nov 6 (sowing) |
| Radish | – | Dec 22–Feb 2 (sow outdoors) | Dec 4–18 (sowing) |
| Turnip | – | Dec 29–Jan 19 (sow outdoors) | Nov 6–20 (sowing) |
| Parsnip | – | Jan 5–26 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 1–29 (sow outdoors) | Oct 23–Nov 6 (sowing) |
| Onion (bulbing) | Nov 3–17 | Dec 15–29 (transplant) | – |
| Green onion / scallion | – | Dec 15–Jan 12 (sow outdoors) | Nov 6–20 (sowing) |
| Leek | Nov 3–17 | Dec 29–Jan 12 (transplant) | – |
| Garlic | – | – | Dec 4–Jan 1 (sowing) |
| Shallot | – | Dec 15–29 (transplant) | Dec 4–Jan 1 (sowing) |
| Potato | – | Dec 29–Jan 12 (transplant) | Sep 25–Oct 9 (transplant) |
| Sweet potato | – | Feb 16–Mar 2 (transplant) | – |
| Sweet corn | – | Feb 2–16 (sow outdoors) | – |
| Bean, bush (snap) | – | Feb 2–16 (sow outdoors) | Oct 23–Nov 6 (sowing) |
| Bean, pole | – | Feb 2–16 (sow outdoors) | – |
| Lima bean | – | Feb 9–23 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Feb 16–Mar 9 (sow outdoors) | – |
| Cucumber | Dec 29–Jan 5 | Feb 2–16 (transplant) Feb 2–16 (sow outdoors) | Oct 23–Nov 6 (sowing) |
| Summer squash / zucchini | Dec 29–Jan 5 | Feb 2–16 (transplant) Feb 2–16 (sow outdoors) | Oct 23–Nov 6 (sowing) |
| Winter squash | Dec 29–Jan 5 | Feb 2–16 (transplant) Feb 2–16 (sow outdoors) | – |
| Pumpkin | – | Feb 2–16 (sow outdoors) | – |
| Watermelon | Dec 29–Jan 5 | Feb 9–23 (transplant) Feb 9–23 (sow outdoors) | – |
| Cantaloupe / muskmelon | Dec 29–Jan 5 | Feb 9–23 (transplant) Feb 9–23 (sow outdoors) | – |
| Okra | Dec 15–29 | Feb 9–23 (transplant) Feb 9–23 (sow outdoors) | – |
| Celery | Nov 3–17 | Feb 2–9 (transplant) | – |
| Basil | Dec 15–29 | Feb 2–16 (transplant) Feb 2–16 (sow outdoors) | – |
| Cilantro | – | Jan 12–Feb 9 (sow outdoors) | Nov 20–Dec 4 (sowing) |
| Parsley | Nov 17–Dec 1 | Jan 12–26 (transplant) Jan 5–26 (sow outdoors) | – |
| Dill | – | Jan 26–Feb 9 (sow outdoors) | Nov 20–Dec 4 (sowing) |
| Sunflower | – | Jan 26–Feb 9 (sow outdoors) | – |
| Asparagus (crowns) | – | Dec 29–Jan 12 (transplant) | – |
| Rhubarb (crowns) | – | Dec 29–Jan 12 (transplant) | – |
| Strawberry (plants) | – | Dec 29–Jan 12 (transplant) | Nov 6–Dec 4 (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
Florida has a university or garden plant program: Florida-Friendly Landscaping™ Plant Guide. Plant frost-tender annuals after January 26 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Port Salerno 5W, FL (NOAA GHCN-Daily ID USC00087304), elevation 12 ft, 3.4 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Stuart, FL | 10 mi | Jan 23 | Jan 18 (next year) |
| Palm Beach Gardens, FL | 17 mi | Jan 21 | Jan 15 (next year) |
| Juno Beach, FL | 19 mi | Jan 26 | Jan 16 (next year) |
The average last-frost dates of these stations span 5 days, a rough guide to local variation. See data sources & methods.
Frost questions for 34997
When is the last frost in 34997?
The average (50% chance) last spring freeze of 32°F for ZIP 34997 is January 26. For a more cautious planting date, use February 18, when only 1 year in 10 still sees a later freeze.
When is the first frost in 34997?
The average first fall freeze is January 15 (next year). In 1 year in 10 it comes by December 26.
What hardiness zone is 34997?
ZIP 34997 is in USDA zone 10b (35 to 40°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 34997 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
33455 Hobe Sound 33478 Jupiter Farms 34990 Palm City 34994 Stuart 34996 Stuart 33469 Tequesta 33458 Jupiter 33418 Palm Beach Gardens
Other ZIP codes in Martin County
33438 33455 33469 34956 34957 34990 34994 34996 All Martin County frost dates · Florida frost dates
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