Frost Dates for Northridge, CA 91325
Last spring frost January 21 · First fall frost November 29 · 312 frost-free days · USDA Zone 10a
ZIP 91325 has about 35,100 people, the largest of 3 ZIP codes in Northridge.
Very long season: 312 frost-free days.
Frost probability for 91325
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | March 17 | January 21 | — |
| Fall (first frost) | November 7 | November 29 | — |
Dates come from NOAA 1971–2000 freeze probabilities at BURBANK VALLEY PUMP PLT (16.6 km away); the 50% date is the median year.
Frost dates by ZIP code in Northridge, CA
| ZIP | Last spring frost (50%) | First fall frost (50%) | Zone |
|---|---|---|---|
| 91325 | January 21 | November 29 | 10a |
| 91324 | January 21 | November 29 | 10a |
| 91330 | January 21 | November 29 | 10a |
Which crops fit a 312-day season in Northridge
In Northridge (312 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 17 | Feb 4–Feb 11 | 270 | fits: 80 days to maturity, 270 available after Feb 4. | Jul 30 |
| Pepper | Dec 10 | Feb 4–Feb 11 | 270 | fits: 75 days to maturity, 270 available after Feb 4. | Aug 4 |
| Lettuce | Nov 26 | Dec 24–Dec 31 | 347 | two-plantings: Plant Dec 24 and again by Oct 8; both mature before Dec 6. | Oct 8 |
| Carrots | — | Dec 31–Jan 7 | 354 | fits: 70 days to maturity, 354 available after Dec 31. | Sep 27 |
| Cucumber | Dec 31 | Feb 4–Feb 11 | 284 | two-plantings: Plant Feb 4 and again by Sep 2; both mature before Nov 15. | Sep 2 |
| Beans | — | Jan 28–Feb 11 | 298 | two-plantings: Plant Jan 28 and again by Sep 9; both mature before Nov 22. | Sep 9 |
| Peas | — | Nov 26–Feb 4 | 375 | fits: 65 days to maturity, 375 available after Nov 26. | Sep 18 |
| Zucchini | Jan 7 | Feb 4–Feb 11 | 284 | two-plantings: Plant Feb 4 and again by Sep 7; both mature before Nov 15. | Sep 7 |
| Onion | Oct 29 | Dec 24–Jan 7 | 347 | fits: 100 days to maturity, 347 available after Dec 24. | — |
| Spinach | — | Nov 26–Jan 14 | 389 | two-plantings: Plant Nov 26 and again by Oct 27; both mature before Dec 20. | Oct 27 |
| Kale | Nov 12 | Dec 24–Jan 7 | 361 | two-plantings: Plant Dec 24 and again by Oct 12; both mature before Dec 20. | Oct 12 |
| Broccoli | Nov 26 | Dec 24–Jan 7 | 347 | fits: 80 days to maturity, 347 available after Dec 24. | Sep 3 |
| Cabbage | Nov 26 | Dec 24–Jan 7 | 361 | fits: 70 days to maturity, 361 available after Dec 24. | Sep 27 |
| Radish | — | Nov 26–Feb 18 | 375 | two-plantings: Plant Nov 26 and again by Oct 28; both mature before Dec 6. | Oct 28 |
| Beets | — | Nov 26–Feb 18 | 375 | two-plantings: Plant Nov 26 and again by Sep 28; both mature before Dec 6. | Sep 28 |
| Potatoes | — | Jan 7–Jan 14 | 333 | fits: 90 days to maturity, 333 available after Jan 7. | — |
| Garlic | — | Nov 29 | 417 | overwinter: Plant Nov 29 to Dec 20; harvest the following summer. | Dec 20 |
| Strawberry | — | Dec 17–Feb 11 | 368 | perennial: A perennial: plant Dec 17; it fruits from the following year and keeps producing for several years. | — |
| Corn | Dec 24 | Jan 28–Feb 4 | 284 | fits: 75 days to maturity, 284 available after Jan 28. | Aug 11 |
| Pumpkin | Jan 7 | Feb 4–Feb 4 | 277 | fits: 100 days to maturity, 277 available after Feb 4. | Jul 17 |
| Cauliflower | Dec 10 | Jan 14–Jan 28 | 326 | fits: 75 days to maturity, 326 available after Jan 14. | Sep 8 |
| Swiss Chard | Nov 26 | Jan 7–Jan 7 | 333 | two-plantings: Plant Jan 7 and again by Sep 28; both mature before Dec 6. | Sep 28 |
| Arugula | — | Nov 26–Feb 18 | 389 | two-plantings: Plant Nov 26 and again by Oct 27; both mature before Dec 20. | Oct 27 |
| Brussel Sprouts | Nov 26 | Dec 24–Jan 7 | 361 | fits: 100 days to maturity, 361 available after Dec 24. | Aug 28 |
| Butternut Squash | Jan 7 | Feb 4–Feb 11 | 277 | fits: 100 days to maturity, 277 available after Feb 4. | Jul 17 |
| Eggplant | Dec 3 | Feb 4–Feb 11 | 270 | fits: 70 days to maturity, 270 available after Feb 4. | Aug 9 |
| Okra | Dec 24 | Jan 28–Feb 4 | 291 | two-plantings: Plant Jan 28 and again by Sep 7; both mature before Nov 15. | Sep 7 |
| Basil | Dec 17 | Feb 11–Feb 11 | 277 | two-plantings: Plant Feb 11 and again by Sep 2; both mature before Nov 15. | Sep 2 |
| Cilantro | — | Dec 24–Jan 14 | 347 | two-plantings: Plant Dec 24 and again by Oct 3; both mature before Dec 6. | Oct 3 |
| Parsley | Nov 12 | Jan 28–Feb 4 | 312 | fits: 70 days to maturity, 312 available after Jan 28. | Sep 13 |
| Celery | Nov 12 | Jan 28–Feb 11 | 312 | fits: 120 days to maturity, 312 available after Jan 28. | Jul 25 |
| Scallions | Nov 12 | Dec 24–Jan 7 | 361 | two-plantings: Plant Dec 24 and again by Oct 7; both mature before Dec 20. | Oct 7 |
| Turnip | — | Dec 24–Jan 7 | 361 | two-plantings: Plant Dec 24 and again by Oct 17; both mature before Dec 20. | Oct 17 |
| Kohlrabi | — | Dec 10–Dec 24 | 375 | two-plantings: Plant Dec 10 and again by Oct 12; both mature before Dec 20. | Oct 12 |
| Bok Choy | Dec 24 | Jan 14–Jan 21 | 326 | two-plantings: Plant Jan 14 and again by Oct 8; both mature before Dec 6. | Oct 8 |
| Collards | Nov 12 | Dec 24–Jan 7 | 361 | two-plantings: Plant Dec 24 and again by Oct 7; both mature before Dec 20. | Oct 7 |
| Cantaloupe | Jan 7 | Feb 4–Feb 11 | 270 | fits: 85 days to maturity, 270 available after Feb 4. | Jul 25 |
| Chives | Oct 29 | Jan 28–Feb 4 | 326 | fits: 90 days to maturity, 326 available after Jan 28. | — |
| Dill | — | Nov 26–Feb 18 | 375 | two-plantings: Plant Nov 26 and again by Sep 28; both mature before Dec 6. | Sep 28 |
| Oregano | Nov 12 | Jan 28–Feb 4 | 326 | fits: 80 days to maturity, 326 available after Jan 28. | — |
| Rosemary | Oct 29 | Jan 28–Feb 4 | 312 | fits: 80 days to maturity, 312 available after Jan 28. | — |
| Sage | Nov 26 | Jan 28–Feb 4 | 326 | fits: 75 days to maturity, 326 available after Jan 28. | — |
| Thyme | Nov 12 | Jan 28–Feb 4 | 326 | fits: 90 days to maturity, 326 available after Jan 28. | — |
| Calendula | Dec 10 | Jan 7–Jan 21 | 333 | two-plantings: Plant Jan 7 and again by Oct 3; both mature before Dec 6. | Oct 3 |
| Cosmos | Dec 24 | Jan 21–Feb 4 | 298 | two-plantings: Plant Jan 21 and again by Sep 2; both mature before Nov 15. | Sep 2 |
| Lavender | Oct 29 | Jan 21–Feb 4 | 333 | fits: 90 days to maturity, 333 available after Jan 21. | — |
| Marigolds | Dec 10 | Jan 21–Jan 28 | 298 | two-plantings: Plant Jan 21 and again by Sep 12; both mature before Nov 15. | Sep 12 |
| Melons | Jan 7 | Feb 4–Feb 11 | 270 | fits: 85 days to maturity, 270 available after Feb 4. | Jul 25 |
| Mint | — | Jan 21–Feb 4 | 333 | fits: 90 days to maturity, 333 available after Jan 21. | — |
| Nasturtiums | Dec 24 | Jan 21–Jan 28 | 298 | two-plantings: Plant Jan 21 and again by Sep 7; both mature before Nov 15. | Sep 7 |
| Pole Beans | — | Jan 28–Feb 11 | 291 | fits: 65 days to maturity, 291 available after Jan 28. | Aug 28 |
| Spaghetti Squash | Jan 7 | Feb 4–Feb 11 | 277 | fits: 90 days to maturity, 277 available after Feb 4. | Jul 27 |
| Sunflowers | — | Jan 21–Feb 4 | 298 | fits: 70 days to maturity, 298 available after Jan 21. | Aug 23 |
| Tomatillos | Nov 26 | Jan 28–Feb 4 | 277 | fits: 75 days to maturity, 277 available after Jan 28. | Aug 4 |
| Watermelon | Jan 7 | Jan 28–Feb 4 | 277 | fits: 80 days to maturity, 277 available after Jan 28. | Jul 30 |
| Yellow Squash | Jan 7 | Feb 4–Feb 11 | 284 | two-plantings: Plant Feb 4 and again by Sep 7; both mature before Nov 15. | Sep 7 |
| Zinnias | Dec 24 | Jan 21–Feb 4 | 298 | two-plantings: Plant Jan 21 and again by Sep 2; both mature before Nov 15. | Sep 2 |
Month by month in Northridge
| Month | What to do |
|---|---|
| January | Start indoors: Butternut Squash (Jan 7), Cantaloupe (Jan 7), Melons (Jan 7), Pumpkin (Jan 7), Spaghetti Squash (Jan 7), Watermelon (Jan 7), +2 more. Direct sow from: Potatoes (Jan 7), Sunflowers (Jan 21), Beans (Jan 28), Pole Beans (Jan 28). Transplant from: Calendula (Jan 7), Swiss Chard (Jan 7), Bok Choy (Jan 14), Cauliflower (Jan 14), Cosmos (Jan 21), Lavender (Jan 21), +15 more. Last frost around January 21. |
| February | Transplant from: Butternut Squash (Feb 4), Cantaloupe (Feb 4), Cucumber (Feb 4), Eggplant (Feb 4), Melons (Feb 4), Pepper (Feb 4), +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 | Last sowing dates: Butternut Squash (Jul 17), Pumpkin (Jul 17), Cantaloupe (Jul 25), Celery (Jul 25), Melons (Jul 25), Spaghetti Squash (Jul 27), +2 more. |
| August | Last sowing dates: Pepper (Aug 4), Tomatillos (Aug 4), Eggplant (Aug 9), Corn (Aug 11), Sunflowers (Aug 23), Brussel Sprouts (Aug 28), +1 more. |
| September | Last sowing dates: Basil (Sep 2), Cosmos (Sep 2), Cucumber (Sep 2), Zinnias (Sep 2), Broccoli (Sep 3), Nasturtiums (Sep 7), +13 more. |
| October | Start indoors: Chives (Oct 29), Lavender (Oct 29), Onion (Oct 29), Rosemary (Oct 29). Last sowing dates: Calendula (Oct 3), Cilantro (Oct 3), Collards (Oct 7), Scallions (Oct 7), Bok Choy (Oct 8), Lettuce (Oct 8), +6 more. |
| November | Start indoors: Celery (Nov 12), Collards (Nov 12), Kale (Nov 12), Oregano (Nov 12), Parsley (Nov 12), Scallions (Nov 12), +8 more. Direct sow from: Arugula (Nov 26), Beets (Nov 26), Dill (Nov 26), Peas (Nov 26), Radish (Nov 26), Spinach (Nov 26), +1 more. First frost around November 29. |
| December | Start indoors: Eggplant (Dec 3), Calendula (Dec 10), Cauliflower (Dec 10), Marigolds (Dec 10), Pepper (Dec 10), Basil (Dec 17), +8 more. Direct sow from: Kohlrabi (Dec 10), Cilantro (Dec 24), Turnip (Dec 24), Carrots (Dec 31). Transplant from: Broccoli (Dec 24), Brussel Sprouts (Dec 24), Cabbage (Dec 24), Collards (Dec 24), Kale (Dec 24), Lettuce (Dec 24), +2 more. Plant: Strawberry (Dec 17). Last sowing dates: Garlic (Dec 20). |
Frequently Asked Questions
What is the last frost date for Northridge, CA (ZIP 91325)?
The median last spring frost date for Northridge, CA (ZIP code 91325) is around January 21. 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 Northridge, CA?
The median first fall frost date for Northridge, CA is around November 29. 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 7 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Northridge, CA?
The frost-free growing season in Northridge is about 312 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 Northridge (312 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 Northridge, CA?
Northridge, CA 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 Northridge, CA?
Start tomatoes indoors Dec 17 and plant out Feb 4 in Northridge. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Northridge?
Two: plant Dec 24 and again by Oct 8; both mature before Dec 6.
When do I plant garlic in Northridge?
Nov 29 to Dec 20; it overwinters and is ready the following summer.
Can I get two tomato crops in Northridge?
Yes: plant out Feb 4 for a summer crop, and set out a second round of transplants by Jul 30 for a fall crop.
Which nearby ZIP has a longer season?
Winnetka (ZIP 91306) has 365 frost-free days, 53 more than Northridge (ZIP 91325). See Winnetka ZIP 91306 frost dates
Nearby and related
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