Frost dates for ZIP 29905 (Port Royal, SC)
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, Beaufort Wwtp, SC (3 miles away).
- Average last spring frostMar 350% chance of a 32°F freeze after this date
- Average first fall frostDec 950% chance of a 32°F freeze by this date
- Growing season (frost-free)282 daysmedian, 32°F threshold
- USDA hardiness zone9a20 to 25°F avg. coldest night
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This week in your yard
As of Oct 17, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
72°F 55°F or warmer
24-hour average · latest 69°F, as of Oct 17, 10:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Youmans Farm (36 mi).
4-inch depth
72°F 55°F or warmer
24-hour average · latest 70°F, as of Oct 17, 10:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Youmans Farm (36 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 29905 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 72°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent (annual bluegrass, winter weeds): window open as soil cools through the 70s and 60s.
Fertilizer window
Lawn region: Southeast (warm, humid). Timing only; always follow the product label.
- Centipedegrass (warm-season): Spring: Not before mid-May (NC State); after full green-up (about Apr 18 here, using green-up about 3–4 weeks after your average last frost); Summer: Optional mid-summer feeding, especially on sandy coastal soils. Avoid: Early-spring feeding, frequent feeding and liming unless a soil test calls for it (centipede decline).
Plant now
- Lettuce: fall sowing Sep 30–Oct 28
- Lettuce: fall transplant Oct 14–Nov 4
- Spinach: fall sowing Oct 14–Nov 4
- Bok choy / Asian greens: fall sowing Oct 14–28
- Arugula: fall sowing Oct 14–Nov 11
- Mustard greens: fall sowing Oct 14–28
- Cilantro: fall sowing Oct 14–28
- Dill: fall sowing Oct 14–28
- Strawberry (plants): fall transplant Sep 30–Oct 28
Coming up in the next 3 weeks
- Radish: fall sowing Oct 28–Nov 11
- Garlic: fall sowing Oct 28–Nov 25
- Shallot: fall sowing Oct 28–Nov 25
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Dec 9: 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) | Feb 2 |
| 50% (the "average" last frost) | Mar 3 |
| 10% (cautious: only 1 year in 10 freezes later) | Mar 20 |
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 21 |
| 50% (the "average" first frost) | Dec 9 |
| 90% (late: most years have frozen by now) | Jan 4 (next year) |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Mar 16 | Nov 26 |
| 32°F (freeze) | Mar 3 | Dec 9 |
| 28°F (hard freeze) | Feb 9 | Dec 28 |
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 29905
Dates count from your average last spring frost (Mar 3) and first fall frost (Dec 9). 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 6–20 | Mar 10–24 (transplant) | Aug 12–Sep 9 (transplant) |
| Pepper (sweet and hot) | Dec 23–Jan 6 | Mar 17–31 (transplant) | Aug 19–Sep 9 (transplant) |
| Eggplant | Dec 23–Jan 6 | Mar 17–31 (transplant) | Aug 19–Sep 9 (transplant) |
| Tomatillo | Jan 6–20 | Mar 10–24 (transplant) | – |
| Lettuce | Jan 6–20 | Feb 10–Mar 3 (transplant) Feb 3–Mar 17 (sow outdoors) | Oct 14–Nov 4 (transplant) Sep 30–Oct 28 (sowing) |
| Spinach | – | Jan 20–Feb 10 (sow outdoors) | Oct 14–Nov 4 (sowing) |
| Kale | Jan 6–20 | Feb 3–17 (transplant) Feb 3–17 (sow outdoors) | Sep 16–Oct 14 (transplant) Sep 2–30 (sowing) |
| Collards | Jan 6–20 | Feb 3–Mar 3 (transplant) Feb 3–Mar 3 (sow outdoors) | Sep 16–Oct 14 (transplant) Sep 2–30 (sowing) |
| Broccoli | Dec 23–Jan 6 | Feb 3–17 (transplant) | Sep 2–30 (transplant) |
| Cabbage | Dec 23–Jan 6 | Feb 3–17 (transplant) | Sep 2–30 (transplant) |
| Cauliflower | Dec 23–Jan 6 | Feb 17–Mar 3 (transplant) | Sep 2–30 (transplant) |
| Brussels sprouts | Dec 9–23 | Feb 3–17 (transplant) | Aug 19–Sep 9 (transplant) |
| Kohlrabi | Jan 6–20 | Feb 3–17 (transplant) Feb 3–17 (sow outdoors) | Sep 30–Oct 14 (sowing) |
| Bok choy / Asian greens | – | Feb 3–17 (sow outdoors) | Oct 14–28 (sowing) |
| Arugula | – | Feb 3–Mar 3 (sow outdoors) | Oct 14–Nov 11 (sowing) |
| Mustard greens | – | Feb 3–24 (sow outdoors) | Oct 14–28 (sowing) |
| Swiss chard | Jan 20–Feb 3 | Feb 17–Mar 10 (transplant) Feb 17–Mar 17 (sow outdoors) | Sep 30–Oct 14 (sowing) |
| Beet | – | Feb 3–Mar 3 (sow outdoors) | Sep 30–Oct 14 (sowing) |
| Carrot | – | Feb 10–Mar 10 (sow outdoors) | Sep 16–30 (sowing) |
| Radish | – | Jan 27–Mar 10 (sow outdoors) | Oct 28–Nov 11 (sowing) |
| Turnip | – | Feb 3–24 (sow outdoors) | Sep 30–Oct 14 (sowing) |
| Parsnip | – | Feb 10–Mar 3 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Jan 6–Feb 3 (sow outdoors) | Sep 16–30 (sowing) |
| Onion (bulbing) | Dec 9–23 | Jan 20–Feb 3 (transplant) | – |
| Green onion / scallion | – | Jan 20–Feb 17 (sow outdoors) | Sep 30–Oct 14 (sowing) |
| Leek | Dec 9–23 | Feb 3–17 (transplant) | – |
| Garlic | – | – | Oct 28–Nov 25 (sowing) |
| Shallot | – | Jan 20–Feb 3 (transplant) | Oct 28–Nov 25 (sowing) |
| Potato | – | Feb 3–17 (transplant) | Aug 19–Sep 2 (transplant) |
| Sweet potato | – | Mar 24–Apr 7 (transplant) | – |
| Sweet corn | – | Mar 10–24 (sow outdoors) | – |
| Bean, bush (snap) | – | Mar 10–24 (sow outdoors) | Sep 16–30 (sowing) |
| Bean, pole | – | Mar 10–24 (sow outdoors) | – |
| Lima bean | – | Mar 17–31 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Mar 24–Apr 14 (sow outdoors) | – |
| Cucumber | Feb 3–10 | Mar 10–24 (transplant) Mar 10–24 (sow outdoors) | Sep 16–30 (sowing) |
| Summer squash / zucchini | Feb 3–10 | Mar 10–24 (transplant) Mar 10–24 (sow outdoors) | Sep 16–30 (sowing) |
| Winter squash | Feb 3–10 | Mar 10–24 (transplant) Mar 10–24 (sow outdoors) | – |
| Pumpkin | – | Mar 10–24 (sow outdoors) | – |
| Watermelon | Feb 3–10 | Mar 17–31 (transplant) Mar 17–31 (sow outdoors) | – |
| Cantaloupe / muskmelon | Feb 3–10 | Mar 17–31 (transplant) Mar 17–31 (sow outdoors) | – |
| Okra | Jan 20–Feb 3 | Mar 17–31 (transplant) Mar 17–31 (sow outdoors) | – |
| Celery | Dec 9–23 | Mar 10–17 (transplant) | – |
| Basil | Jan 20–Feb 3 | Mar 10–24 (transplant) Mar 10–24 (sow outdoors) | – |
| Cilantro | – | Feb 17–Mar 17 (sow outdoors) | Oct 14–28 (sowing) |
| Parsley | Dec 23–Jan 6 | Feb 17–Mar 3 (transplant) Feb 10–Mar 3 (sow outdoors) | – |
| Dill | – | Mar 3–17 (sow outdoors) | Oct 14–28 (sowing) |
| Sunflower | – | Mar 3–17 (sow outdoors) | – |
| Asparagus (crowns) | – | Feb 3–17 (transplant) | – |
| Rhubarb (crowns) | – | Feb 3–17 (transplant) | – |
| Strawberry (plants) | – | Feb 3–17 (transplant) | Sep 30–Oct 28 (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: Beaufort Wwtp, SC (NOAA GHCN-Daily ID USC00380559), elevation 25 ft, 2.8 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Beaufort Mcas, SC | 9 mi | Feb 28 | Dec 3 |
| Yemassee 1 N, SC | 26 mi | Mar 23 | Nov 6 |
| Edisto Beach Sp, SC | 26 mi | Mar 1 | Dec 6 |
The average last-frost dates of these stations span 26 days, a rough guide to local variation. See data sources & methods.
Frost questions for 29905
When is the last frost in 29905?
The average (50% chance) last spring freeze of 32°F for ZIP 29905 is March 3. For a more cautious planting date, use March 20, when only 1 year in 10 still sees a later freeze.
When is the first frost in 29905?
The average first fall freeze is December 9. In 1 year in 10 it comes by November 21.
What hardiness zone is 29905?
ZIP 29905 is in USDA zone 9a (20 to 25°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 29905 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
29935 Port Royal 29902 Port Royal 29906 Beaufort 29926 Hilton Head Island 29920 Fripp Island 29904 Beaufort 29909 Ridgeland 29907
Other ZIP codes in Beaufort County
29902 29904 29906 29907 29909 29910 29915 29920 29926 29928 29935 29940 29941 All Beaufort County frost dates · South Carolina frost dates
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