Frost Dates for Twentynine Palms, CA 92278
Twentynine Palms has 2 ZIP codes. The Twentynine Palms, CA frost page lists all of them with their dates.
Last spring frost January 10 · First fall frost November 20 · 314 frost-free days · USDA Zone 9b
ZIP 92278 has about 3,910 people, one of 2 ZIP codes in Twentynine Palms.
Very long season: 314 frost-free days.
Frost probability for 92278
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | March 7 | January 10 | — |
| Fall (first frost) | November 18 | November 20 | — |
Dates come from NOAA 1971–2000 freeze probabilities at INDIO FIRE STN (60.3 km away); the 50% date is the median year.
Which crops fit a 314-day season in Twentynine Palms
In Twentynine Palms (314 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 6 | Jan 24–Jan 31 | 272 | fits: 80 days to maturity, 272 available after Jan 24. | Jul 21 |
| Pepper | Nov 29 | Jan 24–Jan 31 | 272 | fits: 75 days to maturity, 272 available after Jan 24. | Jul 26 |
| Lettuce | Nov 15 | Dec 13–Dec 20 | 349 | two-plantings: Plant Dec 13 and again by Sep 29; both mature before Nov 27. | Sep 29 |
| Carrots | — | Dec 20–Dec 27 | 356 | fits: 70 days to maturity, 356 available after Dec 20. | Sep 18 |
| Cucumber | Dec 20 | Jan 24–Jan 31 | 286 | two-plantings: Plant Jan 24 and again by Aug 24; both mature before Nov 6. | Aug 24 |
| Beans | — | Jan 17–Jan 31 | 300 | two-plantings: Plant Jan 17 and again by Aug 31; both mature before Nov 13. | Aug 31 |
| Peas | — | Nov 15–Jan 24 | 377 | fits: 65 days to maturity, 377 available after Nov 15. | Sep 9 |
| Zucchini | Dec 27 | Jan 24–Jan 31 | 286 | two-plantings: Plant Jan 24 and again by Aug 29; both mature before Nov 6. | Aug 29 |
| Onion | Oct 18 | Dec 13–Dec 27 | 349 | fits: 100 days to maturity, 349 available after Dec 13. | — |
| Spinach | — | Nov 15–Jan 3 | 391 | two-plantings: Plant Nov 15 and again by Oct 18; both mature before Dec 11. | Oct 18 |
| Kale | Nov 1 | Dec 13–Dec 27 | 363 | two-plantings: Plant Dec 13 and again by Oct 3; both mature before Dec 11. | Oct 3 |
| Broccoli | Nov 15 | Dec 13–Dec 27 | 349 | fits: 80 days to maturity, 349 available after Dec 13. | Aug 25 |
| Cabbage | Nov 15 | Dec 13–Dec 27 | 363 | fits: 70 days to maturity, 363 available after Dec 13. | Sep 18 |
| Radish | — | Nov 15–Feb 7 | 377 | two-plantings: Plant Nov 15 and again by Oct 19; both mature before Nov 27. | Oct 19 |
| Beets | — | Nov 15–Feb 7 | 377 | two-plantings: Plant Nov 15 and again by Sep 19; both mature before Nov 27. | Sep 19 |
| Potatoes | — | Dec 27–Jan 3 | 335 | fits: 90 days to maturity, 335 available after Dec 27. | — |
| Garlic | — | Nov 20 | 419 | overwinter: Plant Nov 20 to Dec 11; harvest the following summer. | Dec 11 |
| Strawberry | — | Dec 6–Jan 31 | 370 | perennial: A perennial: plant Dec 6; it fruits from the following year and keeps producing for several years. | — |
| Corn | Dec 13 | Jan 17–Jan 24 | 286 | fits: 75 days to maturity, 286 available after Jan 17. | Aug 2 |
| Pumpkin | Dec 27 | Jan 24–Jan 24 | 279 | fits: 100 days to maturity, 279 available after Jan 24. | Jul 8 |
| Cauliflower | Nov 29 | Jan 3–Jan 17 | 328 | fits: 75 days to maturity, 328 available after Jan 3. | Aug 30 |
| Swiss Chard | Nov 15 | Dec 27–Dec 27 | 335 | two-plantings: Plant Dec 27 and again by Sep 19; both mature before Nov 27. | Sep 19 |
| Arugula | — | Nov 15–Feb 7 | 391 | two-plantings: Plant Nov 15 and again by Oct 18; both mature before Dec 11. | Oct 18 |
| Brussel Sprouts | Nov 15 | Dec 13–Dec 27 | 363 | fits: 100 days to maturity, 363 available after Dec 13. | Aug 19 |
| Butternut Squash | Dec 27 | Jan 24–Jan 31 | 279 | fits: 100 days to maturity, 279 available after Jan 24. | Jul 8 |
| Eggplant | Nov 22 | Jan 24–Jan 31 | 272 | fits: 70 days to maturity, 272 available after Jan 24. | Jul 31 |
| Okra | Dec 13 | Jan 17–Jan 24 | 293 | two-plantings: Plant Jan 17 and again by Aug 29; both mature before Nov 6. | Aug 29 |
| Basil | Dec 6 | Jan 31–Jan 31 | 279 | two-plantings: Plant Jan 31 and again by Aug 24; both mature before Nov 6. | Aug 24 |
| Cilantro | — | Dec 13–Jan 3 | 349 | two-plantings: Plant Dec 13 and again by Sep 24; both mature before Nov 27. | Sep 24 |
| Parsley | Nov 1 | Jan 17–Jan 24 | 314 | fits: 70 days to maturity, 314 available after Jan 17. | Sep 4 |
| Celery | Nov 1 | Jan 17–Jan 31 | 314 | fits: 120 days to maturity, 314 available after Jan 17. | Jul 16 |
| Scallions | Nov 1 | Dec 13–Dec 27 | 363 | two-plantings: Plant Dec 13 and again by Sep 28; both mature before Dec 11. | Sep 28 |
| Turnip | — | Dec 13–Dec 27 | 363 | two-plantings: Plant Dec 13 and again by Oct 8; both mature before Dec 11. | Oct 8 |
| Kohlrabi | — | Nov 29–Dec 13 | 377 | two-plantings: Plant Nov 29 and again by Oct 3; both mature before Dec 11. | Oct 3 |
| Bok Choy | Dec 13 | Jan 3–Jan 10 | 328 | two-plantings: Plant Jan 3 and again by Sep 29; both mature before Nov 27. | Sep 29 |
| Collards | Nov 1 | Dec 13–Dec 27 | 363 | two-plantings: Plant Dec 13 and again by Sep 28; both mature before Dec 11. | Sep 28 |
| Cantaloupe | Dec 27 | Jan 24–Jan 31 | 272 | fits: 85 days to maturity, 272 available after Jan 24. | Jul 16 |
| Chives | Oct 18 | Jan 17–Jan 24 | 328 | fits: 90 days to maturity, 328 available after Jan 17. | — |
| Dill | — | Nov 15–Feb 7 | 377 | two-plantings: Plant Nov 15 and again by Sep 19; both mature before Nov 27. | Sep 19 |
| Oregano | Nov 1 | Jan 17–Jan 24 | 328 | fits: 80 days to maturity, 328 available after Jan 17. | — |
| Rosemary | Oct 18 | Jan 17–Jan 24 | 314 | fits: 80 days to maturity, 314 available after Jan 17. | — |
| Sage | Nov 15 | Jan 17–Jan 24 | 328 | fits: 75 days to maturity, 328 available after Jan 17. | — |
| Thyme | Nov 1 | Jan 17–Jan 24 | 328 | fits: 90 days to maturity, 328 available after Jan 17. | — |
| Calendula | Nov 29 | Dec 27–Jan 10 | 335 | two-plantings: Plant Dec 27 and again by Sep 24; both mature before Nov 27. | Sep 24 |
| Cosmos | Dec 13 | Jan 10–Jan 24 | 300 | two-plantings: Plant Jan 10 and again by Aug 24; both mature before Nov 6. | Aug 24 |
| Lavender | Oct 18 | Jan 10–Jan 24 | 335 | fits: 90 days to maturity, 335 available after Jan 10. | — |
| Marigolds | Nov 29 | Jan 10–Jan 17 | 300 | two-plantings: Plant Jan 10 and again by Sep 3; both mature before Nov 6. | Sep 3 |
| Melons | Dec 27 | Jan 24–Jan 31 | 272 | fits: 85 days to maturity, 272 available after Jan 24. | Jul 16 |
| Mint | — | Jan 10–Jan 24 | 335 | fits: 90 days to maturity, 335 available after Jan 10. | — |
| Nasturtiums | Dec 13 | Jan 10–Jan 17 | 300 | two-plantings: Plant Jan 10 and again by Aug 29; both mature before Nov 6. | Aug 29 |
| Pole Beans | — | Jan 17–Jan 31 | 293 | fits: 65 days to maturity, 293 available after Jan 17. | Aug 19 |
| Spaghetti Squash | Dec 27 | Jan 24–Jan 31 | 279 | fits: 90 days to maturity, 279 available after Jan 24. | Jul 18 |
| Sunflowers | — | Jan 10–Jan 24 | 300 | fits: 70 days to maturity, 300 available after Jan 10. | Aug 14 |
| Tomatillos | Nov 15 | Jan 17–Jan 24 | 279 | fits: 75 days to maturity, 279 available after Jan 17. | Jul 26 |
| Watermelon | Dec 27 | Jan 17–Jan 24 | 279 | fits: 80 days to maturity, 279 available after Jan 17. | Jul 21 |
| Yellow Squash | Dec 27 | Jan 24–Jan 31 | 286 | two-plantings: Plant Jan 24 and again by Aug 29; both mature before Nov 6. | Aug 29 |
| Zinnias | Dec 13 | Jan 10–Jan 24 | 300 | two-plantings: Plant Jan 10 and again by Aug 24; both mature before Nov 6. | Aug 24 |
Month by month in Twentynine Palms
| Month | What to do |
|---|---|
| January | Direct sow from: Sunflowers (Jan 10), Beans (Jan 17), Pole Beans (Jan 17). Transplant from: Bok Choy (Jan 3), Cauliflower (Jan 3), Cosmos (Jan 10), Lavender (Jan 10), Marigolds (Jan 10), Mint (Jan 10), +25 more. Last frost around January 10. |
| February | Frost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini. |
| March | Succession plant lettuce and greens. Keep beds weeded and watered consistently. |
| April | Harvest regularly to encourage production. Monitor for pests and disease. |
| May | Midsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall. |
| June | Direct sow carrots and beets for fall harvest. Start fall broccoli and kale indoors. |
| July | Last sowing dates: Butternut Squash (Jul 8), Pumpkin (Jul 8), Cantaloupe (Jul 16), Celery (Jul 16), Melons (Jul 16), Spaghetti Squash (Jul 18), +5 more. |
| August | Last sowing dates: Corn (Aug 2), Sunflowers (Aug 14), Brussel Sprouts (Aug 19), Pole Beans (Aug 19), Basil (Aug 24), Cosmos (Aug 24), +9 more. |
| September | Last sowing dates: Marigolds (Sep 3), Parsley (Sep 4), Peas (Sep 9), Cabbage (Sep 18), Carrots (Sep 18), Beets (Sep 19), +8 more. |
| October | Start indoors: Chives (Oct 18), Lavender (Oct 18), Onion (Oct 18), Rosemary (Oct 18). Last sowing dates: Kale (Oct 3), Kohlrabi (Oct 3), Turnip (Oct 8), Arugula (Oct 18), Spinach (Oct 18), Radish (Oct 19). |
| November | Start indoors: Celery (Nov 1), Collards (Nov 1), Kale (Nov 1), Oregano (Nov 1), Parsley (Nov 1), Scallions (Nov 1), +13 more. Direct sow from: Arugula (Nov 15), Beets (Nov 15), Dill (Nov 15), Peas (Nov 15), Radish (Nov 15), Spinach (Nov 15), +2 more. First frost around November 20. |
| December | Start indoors: Basil (Dec 6), Tomato (Dec 6), Bok Choy (Dec 13), Corn (Dec 13), Cosmos (Dec 13), Nasturtiums (Dec 13), +11 more. Direct sow from: Cilantro (Dec 13), Turnip (Dec 13), Carrots (Dec 20), Potatoes (Dec 27). Transplant from: Broccoli (Dec 13), Brussel Sprouts (Dec 13), Cabbage (Dec 13), Collards (Dec 13), Kale (Dec 13), Lettuce (Dec 13), +4 more. Plant: Strawberry (Dec 6). Last sowing dates: Garlic (Dec 11). |
Frequently Asked Questions
What is the last frost date for Twentynine Palms, CA (ZIP 92278)?
The median last spring frost date for Twentynine Palms, CA (ZIP code 92278) is around January 10. 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.
What is the first fall frost date in Twentynine Palms, CA?
The median first fall frost date for Twentynine Palms, CA is around November 20. 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 18 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Twentynine Palms, CA?
The frost-free growing season in Twentynine Palms is about 314 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 Twentynine Palms (314 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 Twentynine Palms, CA?
Twentynine Palms, CA 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 Twentynine Palms, CA?
Start tomatoes indoors Dec 6 and plant out Jan 24 in Twentynine Palms. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Twentynine Palms?
Two: plant Dec 13 and again by Sep 29; both mature before Nov 27.
When do I plant garlic in Twentynine Palms?
Nov 20 to Dec 11; it overwinters and is ready the following summer.
Can I get two tomato crops in Twentynine Palms?
Yes: plant out Jan 24 for a summer crop, and set out a second round of transplants by Jul 21 for a fall crop.
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