Frost Dates for Santa Clarita, CA 91390
Santa Clarita has 2 ZIP codes. The Santa Clarita, CA frost page lists all of them with their dates.
Last spring frost March 25 · First fall frost November 23 · 243 frost-free days · USDA Zone 9b
ZIP 91390 has about 19,300 people, one of 2 ZIP codes in Santa Clarita.
Very long season: 243 frost-free days. Spring frost risk spans February 12–May 2 (79 days). Fall frost risk spans November 5–November 26 (21 days).
Frost probability for 91390
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 2 | March 25 | February 12 |
| Fall (first frost) | November 5 | November 23 | November 26 |
Dates come from NOAA 1971–2000 freeze probabilities at FAIRMONT (19.4 km away); the 50% date is the median year.
Which crops fit a 243-day season in Santa Clarita
In Santa Clarita (243 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 | Feb 18 | Apr 8–Apr 15 | 201 | fits: 80 days to maturity, 201 available after Apr 8. | Jul 24 |
| Pepper | Feb 11 | Apr 8–Apr 15 | 201 | fits: 75 days to maturity, 201 available after Apr 8. | Jul 29 |
| Lettuce | Jan 28 | Feb 25–Mar 4 | 278 | two-plantings: Plant Feb 25 and again by Oct 2; both mature before Nov 30. | Oct 2 |
| Carrots | — | Mar 4–Mar 11 | 285 | fits: 70 days to maturity, 285 available after Mar 4. | Sep 21 |
| Cucumber | Mar 4 | Apr 8–Apr 15 | 215 | two-plantings: Plant Apr 8 and again by Aug 27; both mature before Nov 9. | Aug 27 |
| Beans | — | Apr 1–Apr 15 | 229 | two-plantings: Plant Apr 1 and again by Sep 3; both mature before Nov 16. | Sep 3 |
| Peas | — | Jan 28–Apr 8 | 306 | fits: 65 days to maturity, 306 available after Jan 28. | Sep 12 |
| Zucchini | Mar 11 | Apr 8–Apr 15 | 215 | two-plantings: Plant Apr 8 and again by Sep 1; both mature before Nov 9. | Sep 1 |
| Onion | Dec 31 | Feb 25–Mar 11 | 278 | fits: 100 days to maturity, 278 available after Feb 25. | — |
| Spinach | — | Jan 28–Mar 18 | 320 | two-plantings: Plant Jan 28 and again by Oct 21; both mature before Dec 14. | Oct 21 |
| Kale | Jan 14 | Feb 25–Mar 11 | 292 | two-plantings: Plant Feb 25 and again by Oct 6; both mature before Dec 14. | Oct 6 |
| Broccoli | Jan 28 | Feb 25–Mar 11 | 278 | fits: 80 days to maturity, 278 available after Feb 25. | Aug 28 |
| Cabbage | Jan 28 | Feb 25–Mar 11 | 292 | fits: 70 days to maturity, 292 available after Feb 25. | Sep 21 |
| Radish | — | Jan 28–Apr 22 | 306 | two-plantings: Plant Jan 28 and again by Oct 22; both mature before Nov 30. | Oct 22 |
| Beets | — | Jan 28–Apr 22 | 306 | two-plantings: Plant Jan 28 and again by Sep 22; both mature before Nov 30. | Sep 22 |
| Potatoes | — | Mar 11–Mar 18 | 264 | fits: 90 days to maturity, 264 available after Mar 11. | — |
| Garlic | — | Nov 23 | 348 | overwinter: Plant Nov 23 to Dec 14; harvest the following summer. | Dec 14 |
| Strawberry | — | Feb 18–Apr 15 | 299 | perennial: A perennial: plant Feb 18; it fruits from the following year and keeps producing for several years. | — |
| Corn | Feb 25 | Apr 1–Apr 8 | 215 | fits: 75 days to maturity, 215 available after Apr 1. | Aug 5 |
| Pumpkin | Mar 11 | Apr 8–Apr 8 | 208 | fits: 100 days to maturity, 208 available after Apr 8. | Jul 11 |
| Cauliflower | Feb 11 | Mar 18–Apr 1 | 257 | fits: 75 days to maturity, 257 available after Mar 18. | Sep 2 |
| Swiss Chard | Jan 28 | Mar 11–Mar 11 | 264 | two-plantings: Plant Mar 11 and again by Sep 22; both mature before Nov 30. | Sep 22 |
| Arugula | — | Jan 28–Apr 22 | 320 | two-plantings: Plant Jan 28 and again by Oct 21; both mature before Dec 14. | Oct 21 |
| Brussel Sprouts | Jan 28 | Feb 25–Mar 11 | 292 | fits: 100 days to maturity, 292 available after Feb 25. | Aug 22 |
| Butternut Squash | Mar 11 | Apr 8–Apr 15 | 208 | fits: 100 days to maturity, 208 available after Apr 8. | Jul 11 |
| Eggplant | Feb 4 | Apr 8–Apr 15 | 201 | fits: 70 days to maturity, 201 available after Apr 8. | Aug 3 |
| Okra | Feb 25 | Apr 1–Apr 8 | 222 | two-plantings: Plant Apr 1 and again by Sep 1; both mature before Nov 9. | Sep 1 |
| Basil | Feb 18 | Apr 15–Apr 15 | 208 | two-plantings: Plant Apr 15 and again by Aug 27; both mature before Nov 9. | Aug 27 |
| Cilantro | — | Feb 25–Mar 18 | 278 | two-plantings: Plant Feb 25 and again by Sep 27; both mature before Nov 30. | Sep 27 |
| Parsley | Jan 14 | Apr 1–Apr 8 | 243 | fits: 70 days to maturity, 243 available after Apr 1. | Sep 7 |
| Celery | Jan 14 | Apr 1–Apr 15 | 243 | fits: 120 days to maturity, 243 available after Apr 1. | Jul 19 |
| Scallions | Jan 14 | Feb 25–Mar 11 | 292 | two-plantings: Plant Feb 25 and again by Oct 1; both mature before Dec 14. | Oct 1 |
| Turnip | — | Feb 25–Mar 11 | 292 | two-plantings: Plant Feb 25 and again by Oct 11; both mature before Dec 14. | Oct 11 |
| Kohlrabi | — | Feb 11–Feb 25 | 306 | two-plantings: Plant Feb 11 and again by Oct 6; both mature before Dec 14. | Oct 6 |
| Bok Choy | Feb 25 | Mar 18–Mar 25 | 257 | two-plantings: Plant Mar 18 and again by Oct 2; both mature before Nov 30. | Oct 2 |
| Collards | Jan 14 | Feb 25–Mar 11 | 292 | two-plantings: Plant Feb 25 and again by Oct 1; both mature before Dec 14. | Oct 1 |
| Cantaloupe | Mar 11 | Apr 8–Apr 15 | 201 | fits: 85 days to maturity, 201 available after Apr 8. | Jul 19 |
| Chives | Dec 31 | Apr 1–Apr 8 | 257 | fits: 90 days to maturity, 257 available after Apr 1. | — |
| Dill | — | Jan 28–Apr 22 | 306 | two-plantings: Plant Jan 28 and again by Sep 22; both mature before Nov 30. | Sep 22 |
| Oregano | Jan 14 | Apr 1–Apr 8 | 257 | fits: 80 days to maturity, 257 available after Apr 1. | — |
| Rosemary | Dec 31 | Apr 1–Apr 8 | 243 | fits: 80 days to maturity, 243 available after Apr 1. | — |
| Sage | Jan 28 | Apr 1–Apr 8 | 257 | fits: 75 days to maturity, 257 available after Apr 1. | — |
| Thyme | Jan 14 | Apr 1–Apr 8 | 257 | fits: 90 days to maturity, 257 available after Apr 1. | — |
| Calendula | Feb 11 | Mar 11–Mar 25 | 264 | two-plantings: Plant Mar 11 and again by Sep 27; both mature before Nov 30. | Sep 27 |
| Cosmos | Feb 25 | Mar 25–Apr 8 | 229 | two-plantings: Plant Mar 25 and again by Aug 27; both mature before Nov 9. | Aug 27 |
| Lavender | Dec 31 | Mar 25–Apr 8 | 264 | fits: 90 days to maturity, 264 available after Mar 25. | — |
| Marigolds | Feb 11 | Mar 25–Apr 1 | 229 | two-plantings: Plant Mar 25 and again by Sep 6; both mature before Nov 9. | Sep 6 |
| Melons | Mar 11 | Apr 8–Apr 15 | 201 | fits: 85 days to maturity, 201 available after Apr 8. | Jul 19 |
| Mint | — | Mar 25–Apr 8 | 264 | fits: 90 days to maturity, 264 available after Mar 25. | — |
| Nasturtiums | Feb 25 | Mar 25–Apr 1 | 229 | two-plantings: Plant Mar 25 and again by Sep 1; both mature before Nov 9. | Sep 1 |
| Pole Beans | — | Apr 1–Apr 15 | 222 | fits: 65 days to maturity, 222 available after Apr 1. | Aug 22 |
| Spaghetti Squash | Mar 11 | Apr 8–Apr 15 | 208 | fits: 90 days to maturity, 208 available after Apr 8. | Jul 21 |
| Sunflowers | — | Mar 25–Apr 8 | 229 | fits: 70 days to maturity, 229 available after Mar 25. | Aug 17 |
| Tomatillos | Jan 28 | Apr 1–Apr 8 | 208 | fits: 75 days to maturity, 208 available after Apr 1. | Jul 29 |
| Watermelon | Mar 11 | Apr 1–Apr 8 | 208 | fits: 80 days to maturity, 208 available after Apr 1. | Jul 24 |
| Yellow Squash | Mar 11 | Apr 8–Apr 15 | 215 | two-plantings: Plant Apr 8 and again by Sep 1; both mature before Nov 9. | Sep 1 |
| Zinnias | Feb 25 | Mar 25–Apr 8 | 229 | two-plantings: Plant Mar 25 and again by Aug 27; both mature before Nov 9. | Aug 27 |
Month by month in Santa Clarita
| Month | What to do |
|---|---|
| January | Start indoors: Celery (Jan 14), Collards (Jan 14), Kale (Jan 14), Oregano (Jan 14), Parsley (Jan 14), Scallions (Jan 14), +8 more. Direct sow from: Arugula (Jan 28), Beets (Jan 28), Dill (Jan 28), Peas (Jan 28), Radish (Jan 28), Spinach (Jan 28). |
| February | Start indoors: Eggplant (Feb 4), Calendula (Feb 11), Cauliflower (Feb 11), Marigolds (Feb 11), Pepper (Feb 11), Basil (Feb 18), +7 more. Direct sow from: Kohlrabi (Feb 11), Cilantro (Feb 25), Turnip (Feb 25). Transplant from: Broccoli (Feb 25), Brussel Sprouts (Feb 25), Cabbage (Feb 25), Collards (Feb 25), Kale (Feb 25), Lettuce (Feb 25), +2 more. Plant: Strawberry (Feb 18). |
| March | Start indoors: Cucumber (Mar 4), Butternut Squash (Mar 11), Cantaloupe (Mar 11), Melons (Mar 11), Pumpkin (Mar 11), Spaghetti Squash (Mar 11), +3 more. Direct sow from: Carrots (Mar 4), Potatoes (Mar 11), Sunflowers (Mar 25). Transplant from: Calendula (Mar 11), Swiss Chard (Mar 11), Bok Choy (Mar 18), Cauliflower (Mar 18), Cosmos (Mar 25), Lavender (Mar 25), +4 more. Last frost around March 25. |
| April | Direct sow from: Beans (Apr 1), Pole Beans (Apr 1). Transplant from: Celery (Apr 1), Chives (Apr 1), Corn (Apr 1), Okra (Apr 1), Oregano (Apr 1), Parsley (Apr 1), +17 more. |
| May | Succession plant lettuce and greens. Keep beds weeded and watered consistently. |
| June | Harvest regularly to encourage production. Monitor for pests and disease. |
| July | Last sowing dates: Butternut Squash (Jul 11), Pumpkin (Jul 11), Cantaloupe (Jul 19), Celery (Jul 19), Melons (Jul 19), Spaghetti Squash (Jul 21), +4 more. |
| August | Last sowing dates: Eggplant (Aug 3), Corn (Aug 5), Sunflowers (Aug 17), Brussel Sprouts (Aug 22), Pole Beans (Aug 22), Basil (Aug 27), +4 more. |
| September | Last sowing dates: Nasturtiums (Sep 1), Okra (Sep 1), Yellow Squash (Sep 1), Zucchini (Sep 1), Cauliflower (Sep 2), Beans (Sep 3), +10 more. |
| October | Last sowing dates: Collards (Oct 1), Scallions (Oct 1), Bok Choy (Oct 2), Lettuce (Oct 2), Kale (Oct 6), Kohlrabi (Oct 6), +4 more. |
| November | Direct sow from: Garlic (Nov 23). First frost around November 23. |
| December | Start indoors: Chives (Dec 31), Lavender (Dec 31), Onion (Dec 31), Rosemary (Dec 31). Last sowing dates: Garlic (Dec 14). |
Frequently Asked Questions
What is the last frost date for Santa Clarita, CA (ZIP 91390)?
The median last spring frost date for Santa Clarita, CA (ZIP code 91390) is around March 25. 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 February 12; one in ten it runs past May 2.
What is the first fall frost date in Santa Clarita, CA?
The median first fall frost date for Santa Clarita, CA is around November 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 5 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Santa Clarita, CA?
The frost-free growing season in Santa Clarita is about 243 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 Santa Clarita (243 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 Santa Clarita, CA?
Santa Clarita, 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 Santa Clarita, CA?
Start tomatoes indoors Feb 18 and plant out Apr 8 in Santa Clarita. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Santa Clarita?
Two: plant Feb 25 and again by Oct 2; both mature before Nov 30.
When do I plant garlic in Santa Clarita?
Nov 23 to Dec 14; it overwinters and is ready the following summer.
Can I get two tomato crops in Santa Clarita?
Yes: plant out Apr 8 for a summer crop, and set out a second round of transplants by Jul 24 for a fall crop.
Which nearby ZIP has a longer season?
Santa Clarita (ZIP 91350) has 267 frost-free days, 24 more than Santa Clarita (ZIP 91390). See Santa Clarita ZIP 91350 frost dates
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