Frost Dates for Robstown, TX 78380
Last spring frost February 3 · First fall frost December 23 · 323 frost-free days · USDA Zone 9b
ZIP 78380 has about 23,100 people.
Very long season: 323 frost-free days. Spring frost risk spans January 2–March 13 (70 days). Fall frost risk spans November 25–January 4 (40 days).
Frost probability for 78380
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | March 13 | February 3 | January 2 |
| Fall (first frost) | November 25 | December 23 | January 4 |
Dates come from NOAA 1971–2000 freeze probabilities at CORPUS CHRISTI AP (22.0 km away); the 50% date is the median year.
Which crops fit a 323-day season in Robstown
In Robstown (323 frost-free days, a very long season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Dec 30 | Feb 17–Feb 24 | 281 | fits: 80 days to maturity, 281 available after Feb 17. | Aug 23 |
| Pepper | Dec 23 | Feb 17–Feb 24 | 281 | fits: 75 days to maturity, 281 available after Feb 17. | Aug 28 |
| Lettuce | Dec 9 | Jan 6–Jan 13 | 358 | two-plantings: Plant Jan 6 and again by Nov 1; both mature before Dec 30. | Nov 1 |
| Carrots | — | Jan 13–Jan 20 | 365 | fits: 70 days to maturity, 365 available after Jan 13. | Oct 21 |
| Cucumber | Jan 13 | Feb 17–Feb 24 | 295 | two-plantings: Plant Feb 17 and again by Sep 26; both mature before Dec 9. | Sep 26 |
| Beans | — | Feb 10–Feb 24 | 309 | two-plantings: Plant Feb 10 and again by Oct 3; both mature before Dec 16. | Oct 3 |
| Peas | — | Dec 9–Feb 17 | 386 | fits: 65 days to maturity, 386 available after Dec 9. | Oct 12 |
| Zucchini | Jan 20 | Feb 17–Feb 24 | 295 | two-plantings: Plant Feb 17 and again by Oct 1; both mature before Dec 9. | Oct 1 |
| Onion | Nov 11 | Jan 6–Jan 20 | 358 | fits: 100 days to maturity, 358 available after Jan 6. | — |
| Spinach | — | Dec 9–Jan 27 | 400 | two-plantings: Plant Dec 9 and again by Nov 20; both mature before Jan 13. | Nov 20 |
| Kale | Nov 25 | Jan 6–Jan 20 | 372 | two-plantings: Plant Jan 6 and again by Nov 5; both mature before Jan 13. | Nov 5 |
| Broccoli | Dec 9 | Jan 6–Jan 20 | 358 | fits: 80 days to maturity, 358 available after Jan 6. | Sep 27 |
| Cabbage | Dec 9 | Jan 6–Jan 20 | 372 | fits: 70 days to maturity, 372 available after Jan 6. | Oct 21 |
| Radish | — | Dec 9–Mar 3 | 386 | two-plantings: Plant Dec 9 and again by Nov 21; both mature before Dec 30. | Nov 21 |
| Beets | — | Dec 9–Mar 3 | 386 | two-plantings: Plant Dec 9 and again by Oct 22; both mature before Dec 30. | Oct 22 |
| Potatoes | — | Jan 20–Jan 27 | 344 | fits: 90 days to maturity, 344 available after Jan 20. | — |
| Garlic | — | Dec 23 | 428 | overwinter: Plant Dec 23 to Jan 13; harvest the following summer. | Jan 13 |
| Strawberry | — | Dec 30–Feb 24 | 379 | perennial: A perennial: plant Dec 30; it fruits from the following year and keeps producing for several years. | — |
| Corn | Jan 6 | Feb 10–Feb 17 | 295 | fits: 75 days to maturity, 295 available after Feb 10. | Sep 4 |
| Pumpkin | Jan 20 | Feb 17–Feb 17 | 288 | fits: 100 days to maturity, 288 available after Feb 17. | Aug 10 |
| Cauliflower | Dec 23 | Jan 27–Feb 10 | 337 | fits: 75 days to maturity, 337 available after Jan 27. | Oct 2 |
| Swiss Chard | Dec 9 | Jan 20–Jan 20 | 344 | two-plantings: Plant Jan 20 and again by Oct 22; both mature before Dec 30. | Oct 22 |
| Arugula | — | Dec 9–Mar 3 | 400 | two-plantings: Plant Dec 9 and again by Nov 20; both mature before Jan 13. | Nov 20 |
| Brussel Sprouts | Dec 9 | Jan 6–Jan 20 | 372 | fits: 100 days to maturity, 372 available after Jan 6. | Sep 21 |
| Butternut Squash | Jan 20 | Feb 17–Feb 24 | 288 | fits: 100 days to maturity, 288 available after Feb 17. | Aug 10 |
| Eggplant | Dec 16 | Feb 17–Feb 24 | 281 | fits: 70 days to maturity, 281 available after Feb 17. | Sep 2 |
| Okra | Jan 6 | Feb 10–Feb 17 | 302 | two-plantings: Plant Feb 10 and again by Oct 1; both mature before Dec 9. | Oct 1 |
| Basil | Dec 30 | Feb 24–Feb 24 | 288 | two-plantings: Plant Feb 24 and again by Sep 26; both mature before Dec 9. | Sep 26 |
| Cilantro | — | Jan 6–Jan 27 | 358 | two-plantings: Plant Jan 6 and again by Oct 27; both mature before Dec 30. | Oct 27 |
| Parsley | Nov 25 | Feb 10–Feb 17 | 323 | fits: 70 days to maturity, 323 available after Feb 10. | Oct 7 |
| Celery | Nov 25 | Feb 10–Feb 24 | 323 | fits: 120 days to maturity, 323 available after Feb 10. | Aug 18 |
| Scallions | Nov 25 | Jan 6–Jan 20 | 372 | two-plantings: Plant Jan 6 and again by Oct 31; both mature before Jan 13. | Oct 31 |
| Turnip | — | Jan 6–Jan 20 | 372 | two-plantings: Plant Jan 6 and again by Nov 10; both mature before Jan 13. | Nov 10 |
| Kohlrabi | — | Dec 23–Jan 6 | 386 | two-plantings: Plant Dec 23 and again by Nov 5; both mature before Jan 13. | Nov 5 |
| Bok Choy | Jan 6 | Jan 27–Feb 3 | 337 | two-plantings: Plant Jan 27 and again by Nov 1; both mature before Dec 30. | Nov 1 |
| Collards | Nov 25 | Jan 6–Jan 20 | 372 | two-plantings: Plant Jan 6 and again by Oct 31; both mature before Jan 13. | Oct 31 |
| Cantaloupe | Jan 20 | Feb 17–Feb 24 | 281 | fits: 85 days to maturity, 281 available after Feb 17. | Aug 18 |
| Chives | Nov 11 | Feb 10–Feb 17 | 337 | fits: 90 days to maturity, 337 available after Feb 10. | — |
| Dill | — | Dec 9–Mar 3 | 386 | two-plantings: Plant Dec 9 and again by Oct 22; both mature before Dec 30. | Oct 22 |
| Oregano | Nov 25 | Feb 10–Feb 17 | 337 | fits: 80 days to maturity, 337 available after Feb 10. | — |
| Rosemary | Nov 11 | Feb 10–Feb 17 | 323 | fits: 80 days to maturity, 323 available after Feb 10. | — |
| Sage | Dec 9 | Feb 10–Feb 17 | 337 | fits: 75 days to maturity, 337 available after Feb 10. | — |
| Thyme | Nov 25 | Feb 10–Feb 17 | 337 | fits: 90 days to maturity, 337 available after Feb 10. | — |
| Calendula | Dec 23 | Jan 20–Feb 3 | 344 | two-plantings: Plant Jan 20 and again by Oct 27; both mature before Dec 30. | Oct 27 |
| Cosmos | Jan 6 | Feb 3–Feb 17 | 309 | two-plantings: Plant Feb 3 and again by Sep 26; both mature before Dec 9. | Sep 26 |
| Lavender | Nov 11 | Feb 3–Feb 17 | 344 | fits: 90 days to maturity, 344 available after Feb 3. | — |
| Marigolds | Dec 23 | Feb 3–Feb 10 | 309 | two-plantings: Plant Feb 3 and again by Oct 6; both mature before Dec 9. | Oct 6 |
| Melons | Jan 20 | Feb 17–Feb 24 | 281 | fits: 85 days to maturity, 281 available after Feb 17. | Aug 18 |
| Mint | — | Feb 3–Feb 17 | 344 | fits: 90 days to maturity, 344 available after Feb 3. | — |
| Nasturtiums | Jan 6 | Feb 3–Feb 10 | 309 | two-plantings: Plant Feb 3 and again by Oct 1; both mature before Dec 9. | Oct 1 |
| Pole Beans | — | Feb 10–Feb 24 | 302 | fits: 65 days to maturity, 302 available after Feb 10. | Sep 21 |
| Spaghetti Squash | Jan 20 | Feb 17–Feb 24 | 288 | fits: 90 days to maturity, 288 available after Feb 17. | Aug 20 |
| Sunflowers | — | Feb 3–Feb 17 | 309 | fits: 70 days to maturity, 309 available after Feb 3. | Sep 16 |
| Tomatillos | Dec 9 | Feb 10–Feb 17 | 288 | fits: 75 days to maturity, 288 available after Feb 10. | Aug 28 |
| Watermelon | Jan 20 | Feb 10–Feb 17 | 288 | fits: 80 days to maturity, 288 available after Feb 10. | Aug 23 |
| Yellow Squash | Jan 20 | Feb 17–Feb 24 | 295 | two-plantings: Plant Feb 17 and again by Oct 1; both mature before Dec 9. | Oct 1 |
| Zinnias | Jan 6 | Feb 3–Feb 17 | 309 | two-plantings: Plant Feb 3 and again by Sep 26; both mature before Dec 9. | Sep 26 |
Month by month in Robstown
| Month | What to do |
|---|---|
| January | Start indoors: Bok Choy (Jan 6), Corn (Jan 6), Cosmos (Jan 6), Nasturtiums (Jan 6), Okra (Jan 6), Zinnias (Jan 6), +9 more. Direct sow from: Cilantro (Jan 6), Turnip (Jan 6), Carrots (Jan 13), Potatoes (Jan 20). Transplant from: Broccoli (Jan 6), Brussel Sprouts (Jan 6), Cabbage (Jan 6), Collards (Jan 6), Kale (Jan 6), Lettuce (Jan 6), +6 more. Last sowing dates: Garlic (Jan 13). |
| February | Direct sow from: Sunflowers (Feb 3), Beans (Feb 10), Pole Beans (Feb 10). Transplant from: Cosmos (Feb 3), Lavender (Feb 3), Marigolds (Feb 3), Mint (Feb 3), Nasturtiums (Feb 3), Zinnias (Feb 3), +23 more. Last frost around February 3. |
| March | Frost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini. |
| April | Succession plant lettuce and greens. Keep beds weeded and watered consistently. |
| May | Harvest regularly to encourage production. Monitor for pests and disease. |
| June | Midsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall. |
| July | Direct sow carrots and beets for fall harvest. Start fall broccoli and kale indoors. |
| August | Last sowing dates: Butternut Squash (Aug 10), Pumpkin (Aug 10), Cantaloupe (Aug 18), Celery (Aug 18), Melons (Aug 18), Spaghetti Squash (Aug 20), +4 more. |
| September | Last sowing dates: Eggplant (Sep 2), Corn (Sep 4), Sunflowers (Sep 16), Brussel Sprouts (Sep 21), Pole Beans (Sep 21), Basil (Sep 26), +4 more. |
| October | Last sowing dates: Nasturtiums (Oct 1), Okra (Oct 1), Yellow Squash (Oct 1), Zucchini (Oct 1), Cauliflower (Oct 2), Beans (Oct 3), +12 more. |
| November | Start indoors: Chives (Nov 11), Lavender (Nov 11), Onion (Nov 11), Rosemary (Nov 11), Celery (Nov 25), Collards (Nov 25), +5 more. Last sowing dates: Bok Choy (Nov 1), Lettuce (Nov 1), Kale (Nov 5), Kohlrabi (Nov 5), Turnip (Nov 10), Arugula (Nov 20), +2 more. |
| December | Start indoors: Broccoli (Dec 9), Brussel Sprouts (Dec 9), Cabbage (Dec 9), Lettuce (Dec 9), Sage (Dec 9), Swiss Chard (Dec 9), +8 more. Direct sow from: Arugula (Dec 9), Beets (Dec 9), Dill (Dec 9), Peas (Dec 9), Radish (Dec 9), Spinach (Dec 9), +2 more. Plant: Strawberry (Dec 30). First frost around December 23. |
Frequently Asked Questions
What is the last frost date for Robstown, TX (ZIP 78380)?
The median last spring frost date for Robstown, TX (ZIP code 78380) is around February 3. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area. One year in ten frost ends before January 2; one in ten it runs past March 13.
What is the first fall frost date in Robstown, TX?
The median first fall frost date for Robstown, TX is around December 23. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses. The first frost arrives around November 25 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Robstown, TX?
The frost-free growing season in Robstown is about 323 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side. In Robstown (323 frost-free days, a very long season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Robstown, TX?
Robstown, TX is in USDA hardiness zone 9b (2023 USDA Plant Hardiness Zone Map). Zones come from the average coldest winter temperature, so they tell you which perennials survive the winter; the frost dates on this page tell you when to plant.
When should I start tomatoes indoors in Robstown, TX?
Start tomatoes indoors Dec 30 and plant out Feb 17 in Robstown. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Robstown?
Two: plant Jan 6 and again by Nov 1; both mature before Dec 30.
When do I plant garlic in Robstown?
Dec 23 to Jan 13; it overwinters and is ready the following summer.
Can I get two tomato crops in Robstown?
Yes: plant out Feb 17 for a summer crop, and set out a second round of transplants by Aug 23 for a fall crop.
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