Frost Dates for San Luis, AZ 85336
San Luis has 2 ZIP codes. The San Luis, AZ frost page lists all of them with their dates.
Last spring frost January 24 · First fall frost December 20 · 330 frost-free days · USDA Zone 10a
ZIP 85336 has about 6,510 people, one of 2 ZIP codes in San Luis.
Very long season: 330 frost-free days.
Frost probability for 85336
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | February 16 | January 24 | — |
| Fall (first frost) | November 27 | December 20 | — |
Dates come from NOAA 1971–2000 freeze probabilities at YUMA CITRUS STN (17.0 km away); the 50% date is the median year.
Which crops fit a 330-day season in San Luis
In San Luis (330 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 20 | Feb 7–Feb 14 | 288 | fits: 80 days to maturity, 288 available after Feb 7. | Aug 20 |
| Pepper | Dec 13 | Feb 7–Feb 14 | 288 | fits: 75 days to maturity, 288 available after Feb 7. | Aug 25 |
| Lettuce | Nov 29 | Dec 27–Jan 3 | 365 | two-plantings: Plant Dec 27 and again by Oct 29; both mature before Dec 27. | Oct 29 |
| Carrots | — | Jan 3–Jan 10 | 372 | fits: 70 days to maturity, 372 available after Jan 3. | Oct 18 |
| Cucumber | Jan 3 | Feb 7–Feb 14 | 302 | two-plantings: Plant Feb 7 and again by Sep 23; both mature before Dec 6. | Sep 23 |
| Beans | — | Jan 31–Feb 14 | 316 | two-plantings: Plant Jan 31 and again by Sep 30; both mature before Dec 13. | Sep 30 |
| Peas | — | Nov 29–Feb 7 | 393 | fits: 65 days to maturity, 393 available after Nov 29. | Oct 9 |
| Zucchini | Jan 10 | Feb 7–Feb 14 | 302 | two-plantings: Plant Feb 7 and again by Sep 28; both mature before Dec 6. | Sep 28 |
| Onion | Nov 1 | Dec 27–Jan 10 | 365 | fits: 100 days to maturity, 365 available after Dec 27. | — |
| Spinach | — | Nov 29–Jan 17 | 407 | two-plantings: Plant Nov 29 and again by Nov 17; both mature before Jan 10. | Nov 17 |
| Kale | Nov 15 | Dec 27–Jan 10 | 379 | two-plantings: Plant Dec 27 and again by Nov 2; both mature before Jan 10. | Nov 2 |
| Broccoli | Nov 29 | Dec 27–Jan 10 | 365 | fits: 80 days to maturity, 365 available after Dec 27. | Sep 24 |
| Cabbage | Nov 29 | Dec 27–Jan 10 | 379 | fits: 70 days to maturity, 379 available after Dec 27. | Oct 18 |
| Radish | — | Nov 29–Feb 21 | 393 | two-plantings: Plant Nov 29 and again by Nov 18; both mature before Dec 27. | Nov 18 |
| Beets | — | Nov 29–Feb 21 | 393 | two-plantings: Plant Nov 29 and again by Oct 19; both mature before Dec 27. | Oct 19 |
| Potatoes | — | Jan 10–Jan 17 | 351 | fits: 90 days to maturity, 351 available after Jan 10. | — |
| Garlic | — | Dec 20 | 435 | overwinter: Plant Dec 20 to Jan 10; harvest the following summer. | Jan 10 |
| Strawberry | — | Dec 20–Feb 14 | 386 | perennial: A perennial: plant Dec 20; it fruits from the following year and keeps producing for several years. | — |
| Corn | Dec 27 | Jan 31–Feb 7 | 302 | fits: 75 days to maturity, 302 available after Jan 31. | Sep 1 |
| Pumpkin | Jan 10 | Feb 7–Feb 7 | 295 | fits: 100 days to maturity, 295 available after Feb 7. | Aug 7 |
| Cauliflower | Dec 13 | Jan 17–Jan 31 | 344 | fits: 75 days to maturity, 344 available after Jan 17. | Sep 29 |
| Swiss Chard | Nov 29 | Jan 10–Jan 10 | 351 | two-plantings: Plant Jan 10 and again by Oct 19; both mature before Dec 27. | Oct 19 |
| Arugula | — | Nov 29–Feb 21 | 407 | two-plantings: Plant Nov 29 and again by Nov 17; both mature before Jan 10. | Nov 17 |
| Brussel Sprouts | Nov 29 | Dec 27–Jan 10 | 379 | fits: 100 days to maturity, 379 available after Dec 27. | Sep 18 |
| Butternut Squash | Jan 10 | Feb 7–Feb 14 | 295 | fits: 100 days to maturity, 295 available after Feb 7. | Aug 7 |
| Eggplant | Dec 6 | Feb 7–Feb 14 | 288 | fits: 70 days to maturity, 288 available after Feb 7. | Aug 30 |
| Okra | Dec 27 | Jan 31–Feb 7 | 309 | two-plantings: Plant Jan 31 and again by Sep 28; both mature before Dec 6. | Sep 28 |
| Basil | Dec 20 | Feb 14–Feb 14 | 295 | two-plantings: Plant Feb 14 and again by Sep 23; both mature before Dec 6. | Sep 23 |
| Cilantro | — | Dec 27–Jan 17 | 365 | two-plantings: Plant Dec 27 and again by Oct 24; both mature before Dec 27. | Oct 24 |
| Parsley | Nov 15 | Jan 31–Feb 7 | 330 | fits: 70 days to maturity, 330 available after Jan 31. | Oct 4 |
| Celery | Nov 15 | Jan 31–Feb 14 | 330 | fits: 120 days to maturity, 330 available after Jan 31. | Aug 15 |
| Scallions | Nov 15 | Dec 27–Jan 10 | 379 | two-plantings: Plant Dec 27 and again by Oct 28; both mature before Jan 10. | Oct 28 |
| Turnip | — | Dec 27–Jan 10 | 379 | two-plantings: Plant Dec 27 and again by Nov 7; both mature before Jan 10. | Nov 7 |
| Kohlrabi | — | Dec 13–Dec 27 | 393 | two-plantings: Plant Dec 13 and again by Nov 2; both mature before Jan 10. | Nov 2 |
| Bok Choy | Dec 27 | Jan 17–Jan 24 | 344 | two-plantings: Plant Jan 17 and again by Oct 29; both mature before Dec 27. | Oct 29 |
| Collards | Nov 15 | Dec 27–Jan 10 | 379 | two-plantings: Plant Dec 27 and again by Oct 28; both mature before Jan 10. | Oct 28 |
| Cantaloupe | Jan 10 | Feb 7–Feb 14 | 288 | fits: 85 days to maturity, 288 available after Feb 7. | Aug 15 |
| Chives | Nov 1 | Jan 31–Feb 7 | 344 | fits: 90 days to maturity, 344 available after Jan 31. | — |
| Dill | — | Nov 29–Feb 21 | 393 | two-plantings: Plant Nov 29 and again by Oct 19; both mature before Dec 27. | Oct 19 |
| Oregano | Nov 15 | Jan 31–Feb 7 | 344 | fits: 80 days to maturity, 344 available after Jan 31. | — |
| Rosemary | Nov 1 | Jan 31–Feb 7 | 330 | fits: 80 days to maturity, 330 available after Jan 31. | — |
| Sage | Nov 29 | Jan 31–Feb 7 | 344 | fits: 75 days to maturity, 344 available after Jan 31. | — |
| Thyme | Nov 15 | Jan 31–Feb 7 | 344 | fits: 90 days to maturity, 344 available after Jan 31. | — |
| Calendula | Dec 13 | Jan 10–Jan 24 | 351 | two-plantings: Plant Jan 10 and again by Oct 24; both mature before Dec 27. | Oct 24 |
| Cosmos | Dec 27 | Jan 24–Feb 7 | 316 | two-plantings: Plant Jan 24 and again by Sep 23; both mature before Dec 6. | Sep 23 |
| Lavender | Nov 1 | Jan 24–Feb 7 | 351 | fits: 90 days to maturity, 351 available after Jan 24. | — |
| Marigolds | Dec 13 | Jan 24–Jan 31 | 316 | two-plantings: Plant Jan 24 and again by Oct 3; both mature before Dec 6. | Oct 3 |
| Melons | Jan 10 | Feb 7–Feb 14 | 288 | fits: 85 days to maturity, 288 available after Feb 7. | Aug 15 |
| Mint | — | Jan 24–Feb 7 | 351 | fits: 90 days to maturity, 351 available after Jan 24. | — |
| Nasturtiums | Dec 27 | Jan 24–Jan 31 | 316 | two-plantings: Plant Jan 24 and again by Sep 28; both mature before Dec 6. | Sep 28 |
| Pole Beans | — | Jan 31–Feb 14 | 309 | fits: 65 days to maturity, 309 available after Jan 31. | Sep 18 |
| Spaghetti Squash | Jan 10 | Feb 7–Feb 14 | 295 | fits: 90 days to maturity, 295 available after Feb 7. | Aug 17 |
| Sunflowers | — | Jan 24–Feb 7 | 316 | fits: 70 days to maturity, 316 available after Jan 24. | Sep 13 |
| Tomatillos | Nov 29 | Jan 31–Feb 7 | 295 | fits: 75 days to maturity, 295 available after Jan 31. | Aug 25 |
| Watermelon | Jan 10 | Jan 31–Feb 7 | 295 | fits: 80 days to maturity, 295 available after Jan 31. | Aug 20 |
| Yellow Squash | Jan 10 | Feb 7–Feb 14 | 302 | two-plantings: Plant Feb 7 and again by Sep 28; both mature before Dec 6. | Sep 28 |
| Zinnias | Dec 27 | Jan 24–Feb 7 | 316 | two-plantings: Plant Jan 24 and again by Sep 23; both mature before Dec 6. | Sep 23 |
Month by month in San Luis
| Month | What to do |
|---|---|
| January | Start indoors: Cucumber (Jan 3), Butternut Squash (Jan 10), Cantaloupe (Jan 10), Melons (Jan 10), Pumpkin (Jan 10), Spaghetti Squash (Jan 10), +3 more. Direct sow from: Carrots (Jan 3), Potatoes (Jan 10), Sunflowers (Jan 24), Beans (Jan 31), Pole Beans (Jan 31). Transplant from: Calendula (Jan 10), Swiss Chard (Jan 10), Bok Choy (Jan 17), Cauliflower (Jan 17), Cosmos (Jan 24), Lavender (Jan 24), +15 more. Last frost around January 24. Last sowing dates: Garlic (Jan 10). |
| February | Transplant from: Butternut Squash (Feb 7), Cantaloupe (Feb 7), Cucumber (Feb 7), Eggplant (Feb 7), Melons (Feb 7), Pepper (Feb 7), +6 more. |
| 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 | Direct sow carrots and beets for fall harvest. Start fall broccoli and kale indoors. |
| August | Last sowing dates: Butternut Squash (Aug 7), Pumpkin (Aug 7), Cantaloupe (Aug 15), Celery (Aug 15), Melons (Aug 15), Spaghetti Squash (Aug 17), +5 more. |
| September | Last sowing dates: Corn (Sep 1), Sunflowers (Sep 13), Brussel Sprouts (Sep 18), Pole Beans (Sep 18), Basil (Sep 23), Cosmos (Sep 23), +9 more. |
| October | Last sowing dates: Marigolds (Oct 3), Parsley (Oct 4), Peas (Oct 9), Cabbage (Oct 18), Carrots (Oct 18), Beets (Oct 19), +8 more. |
| November | Start indoors: Chives (Nov 1), Lavender (Nov 1), Onion (Nov 1), Rosemary (Nov 1), Celery (Nov 15), Collards (Nov 15), +12 more. Direct sow from: Arugula (Nov 29), Beets (Nov 29), Dill (Nov 29), Peas (Nov 29), Radish (Nov 29), Spinach (Nov 29). Last sowing dates: Kale (Nov 2), Kohlrabi (Nov 2), Turnip (Nov 7), Arugula (Nov 17), Spinach (Nov 17), Radish (Nov 18). |
| December | Start indoors: Eggplant (Dec 6), Calendula (Dec 13), Cauliflower (Dec 13), Marigolds (Dec 13), Pepper (Dec 13), Basil (Dec 20), +7 more. Direct sow from: Kohlrabi (Dec 13), Garlic (Dec 20), Cilantro (Dec 27), Turnip (Dec 27). Transplant from: Broccoli (Dec 27), Brussel Sprouts (Dec 27), Cabbage (Dec 27), Collards (Dec 27), Kale (Dec 27), Lettuce (Dec 27), +2 more. Plant: Strawberry (Dec 20). First frost around December 20. |
Frequently Asked Questions
What is the last frost date for San Luis, AZ (ZIP 85336)?
The median last spring frost date for San Luis, AZ (ZIP code 85336) is around January 24. 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 San Luis, AZ?
The median first fall frost date for San Luis, AZ is around December 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 27 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in San Luis, AZ?
The frost-free growing season in San Luis is about 330 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 San Luis (330 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 San Luis, AZ?
San Luis, AZ is in USDA hardiness zone 10a (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 San Luis, AZ?
Start tomatoes indoors Dec 20 and plant out Feb 7 in San Luis. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in San Luis?
Two: plant Dec 27 and again by Oct 29; both mature before Dec 27.
When do I plant garlic in San Luis?
Dec 20 to Jan 10; it overwinters and is ready the following summer.
Can I get two tomato crops in San Luis?
Yes: plant out Feb 7 for a summer crop, and set out a second round of transplants by Aug 20 for a fall crop.
Which nearby ZIP has a longer season?
Brawley (ZIP 92227) has 351 frost-free days, 21 more than San Luis (ZIP 85336). See Brawley ZIP 92227 frost dates
Nearby and related
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