Frost Dates for Oroville, CA 95965
Oroville has 2 ZIP codes. The Oroville, CA frost page lists all of them with their dates.
Last spring frost March 6 · First fall frost December 2 · 271 frost-free days · USDA Zone 9b
ZIP 95965 has about 21,200 people, one of 2 ZIP codes in Oroville.
Very long season: 271 frost-free days. Spring frost risk spans February 14–April 14 (59 days). Fall frost risk spans November 2–December 1 (29 days).
Frost probability for 95965
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | April 14 | March 6 | February 14 |
| Fall (first frost) | November 2 | December 2 | December 1 |
Dates come from NOAA 1971–2000 freeze probabilities at PARADISE (18.3 km away); the 50% date is the median year.
Which crops fit a 271-day season in Oroville
In Oroville (271 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 | Jan 30 | Mar 20–Mar 27 | 229 | fits: 80 days to maturity, 229 available after Mar 20. | Aug 2 |
| Pepper | Jan 23 | Mar 20–Mar 27 | 229 | fits: 75 days to maturity, 229 available after Mar 20. | Aug 7 |
| Lettuce | Jan 9 | Feb 6–Feb 13 | 306 | two-plantings: Plant Feb 6 and again by Oct 11; both mature before Dec 9. | Oct 11 |
| Carrots | — | Feb 13–Feb 20 | 313 | fits: 70 days to maturity, 313 available after Feb 13. | Sep 30 |
| Cucumber | Feb 13 | Mar 20–Mar 27 | 243 | two-plantings: Plant Mar 20 and again by Sep 5; both mature before Nov 18. | Sep 5 |
| Beans | — | Mar 13–Mar 27 | 257 | two-plantings: Plant Mar 13 and again by Sep 12; both mature before Nov 25. | Sep 12 |
| Peas | — | Jan 9–Mar 20 | 334 | fits: 65 days to maturity, 334 available after Jan 9. | Sep 21 |
| Zucchini | Feb 20 | Mar 20–Mar 27 | 243 | two-plantings: Plant Mar 20 and again by Sep 10; both mature before Nov 18. | Sep 10 |
| Onion | Dec 12 | Feb 6–Feb 20 | 306 | fits: 100 days to maturity, 306 available after Feb 6. | — |
| Spinach | — | Jan 9–Feb 27 | 348 | two-plantings: Plant Jan 9 and again by Oct 30; both mature before Dec 23. | Oct 30 |
| Kale | Dec 26 | Feb 6–Feb 20 | 320 | two-plantings: Plant Feb 6 and again by Oct 15; both mature before Dec 23. | Oct 15 |
| Broccoli | Jan 9 | Feb 6–Feb 20 | 306 | fits: 80 days to maturity, 306 available after Feb 6. | Sep 6 |
| Cabbage | Jan 9 | Feb 6–Feb 20 | 320 | fits: 70 days to maturity, 320 available after Feb 6. | Sep 30 |
| Radish | — | Jan 9–Apr 3 | 334 | two-plantings: Plant Jan 9 and again by Oct 31; both mature before Dec 9. | Oct 31 |
| Beets | — | Jan 9–Apr 3 | 334 | two-plantings: Plant Jan 9 and again by Oct 1; both mature before Dec 9. | Oct 1 |
| Potatoes | — | Feb 20–Feb 27 | 292 | fits: 90 days to maturity, 292 available after Feb 20. | — |
| Garlic | — | Dec 2 | 376 | overwinter: Plant Dec 2 to Dec 23; harvest the following summer. | Dec 23 |
| Strawberry | — | Jan 30–Mar 27 | 327 | perennial: A perennial: plant Jan 30; it fruits from the following year and keeps producing for several years. | — |
| Corn | Feb 6 | Mar 13–Mar 20 | 243 | fits: 75 days to maturity, 243 available after Mar 13. | Aug 14 |
| Pumpkin | Feb 20 | Mar 20–Mar 20 | 236 | fits: 100 days to maturity, 236 available after Mar 20. | Jul 20 |
| Cauliflower | Jan 23 | Feb 27–Mar 13 | 285 | fits: 75 days to maturity, 285 available after Feb 27. | Sep 11 |
| Swiss Chard | Jan 9 | Feb 20–Feb 20 | 292 | two-plantings: Plant Feb 20 and again by Oct 1; both mature before Dec 9. | Oct 1 |
| Arugula | — | Jan 9–Apr 3 | 348 | two-plantings: Plant Jan 9 and again by Oct 30; both mature before Dec 23. | Oct 30 |
| Brussel Sprouts | Jan 9 | Feb 6–Feb 20 | 320 | fits: 100 days to maturity, 320 available after Feb 6. | Aug 31 |
| Butternut Squash | Feb 20 | Mar 20–Mar 27 | 236 | fits: 100 days to maturity, 236 available after Mar 20. | Jul 20 |
| Eggplant | Jan 16 | Mar 20–Mar 27 | 229 | fits: 70 days to maturity, 229 available after Mar 20. | Aug 12 |
| Okra | Feb 6 | Mar 13–Mar 20 | 250 | two-plantings: Plant Mar 13 and again by Sep 10; both mature before Nov 18. | Sep 10 |
| Basil | Jan 30 | Mar 27–Mar 27 | 236 | two-plantings: Plant Mar 27 and again by Sep 5; both mature before Nov 18. | Sep 5 |
| Cilantro | — | Feb 6–Feb 27 | 306 | two-plantings: Plant Feb 6 and again by Oct 6; both mature before Dec 9. | Oct 6 |
| Parsley | Dec 26 | Mar 13–Mar 20 | 271 | fits: 70 days to maturity, 271 available after Mar 13. | Sep 16 |
| Celery | Dec 26 | Mar 13–Mar 27 | 271 | fits: 120 days to maturity, 271 available after Mar 13. | Jul 28 |
| Scallions | Dec 26 | Feb 6–Feb 20 | 320 | two-plantings: Plant Feb 6 and again by Oct 10; both mature before Dec 23. | Oct 10 |
| Turnip | — | Feb 6–Feb 20 | 320 | two-plantings: Plant Feb 6 and again by Oct 20; both mature before Dec 23. | Oct 20 |
| Kohlrabi | — | Jan 23–Feb 6 | 334 | two-plantings: Plant Jan 23 and again by Oct 15; both mature before Dec 23. | Oct 15 |
| Bok Choy | Feb 6 | Feb 27–Mar 6 | 285 | two-plantings: Plant Feb 27 and again by Oct 11; both mature before Dec 9. | Oct 11 |
| Collards | Dec 26 | Feb 6–Feb 20 | 320 | two-plantings: Plant Feb 6 and again by Oct 10; both mature before Dec 23. | Oct 10 |
| Cantaloupe | Feb 20 | Mar 20–Mar 27 | 229 | fits: 85 days to maturity, 229 available after Mar 20. | Jul 28 |
| Chives | Dec 12 | Mar 13–Mar 20 | 285 | fits: 90 days to maturity, 285 available after Mar 13. | — |
| Dill | — | Jan 9–Apr 3 | 334 | two-plantings: Plant Jan 9 and again by Oct 1; both mature before Dec 9. | Oct 1 |
| Oregano | Dec 26 | Mar 13–Mar 20 | 285 | fits: 80 days to maturity, 285 available after Mar 13. | — |
| Rosemary | Dec 12 | Mar 13–Mar 20 | 271 | fits: 80 days to maturity, 271 available after Mar 13. | — |
| Sage | Jan 9 | Mar 13–Mar 20 | 285 | fits: 75 days to maturity, 285 available after Mar 13. | — |
| Thyme | Dec 26 | Mar 13–Mar 20 | 285 | fits: 90 days to maturity, 285 available after Mar 13. | — |
| Calendula | Jan 23 | Feb 20–Mar 6 | 292 | two-plantings: Plant Feb 20 and again by Oct 6; both mature before Dec 9. | Oct 6 |
| Cosmos | Feb 6 | Mar 6–Mar 20 | 257 | two-plantings: Plant Mar 6 and again by Sep 5; both mature before Nov 18. | Sep 5 |
| Lavender | Dec 12 | Mar 6–Mar 20 | 292 | fits: 90 days to maturity, 292 available after Mar 6. | — |
| Marigolds | Jan 23 | Mar 6–Mar 13 | 257 | two-plantings: Plant Mar 6 and again by Sep 15; both mature before Nov 18. | Sep 15 |
| Melons | Feb 20 | Mar 20–Mar 27 | 229 | fits: 85 days to maturity, 229 available after Mar 20. | Jul 28 |
| Mint | — | Mar 6–Mar 20 | 292 | fits: 90 days to maturity, 292 available after Mar 6. | — |
| Nasturtiums | Feb 6 | Mar 6–Mar 13 | 257 | two-plantings: Plant Mar 6 and again by Sep 10; both mature before Nov 18. | Sep 10 |
| Pole Beans | — | Mar 13–Mar 27 | 250 | fits: 65 days to maturity, 250 available after Mar 13. | Aug 31 |
| Spaghetti Squash | Feb 20 | Mar 20–Mar 27 | 236 | fits: 90 days to maturity, 236 available after Mar 20. | Jul 30 |
| Sunflowers | — | Mar 6–Mar 20 | 257 | fits: 70 days to maturity, 257 available after Mar 6. | Aug 26 |
| Tomatillos | Jan 9 | Mar 13–Mar 20 | 236 | fits: 75 days to maturity, 236 available after Mar 13. | Aug 7 |
| Watermelon | Feb 20 | Mar 13–Mar 20 | 236 | fits: 80 days to maturity, 236 available after Mar 13. | Aug 2 |
| Yellow Squash | Feb 20 | Mar 20–Mar 27 | 243 | two-plantings: Plant Mar 20 and again by Sep 10; both mature before Nov 18. | Sep 10 |
| Zinnias | Feb 6 | Mar 6–Mar 20 | 257 | two-plantings: Plant Mar 6 and again by Sep 5; both mature before Nov 18. | Sep 5 |
Month by month in Oroville
| Month | What to do |
|---|---|
| January | Start indoors: Broccoli (Jan 9), Brussel Sprouts (Jan 9), Cabbage (Jan 9), Lettuce (Jan 9), Sage (Jan 9), Swiss Chard (Jan 9), +8 more. Direct sow from: Arugula (Jan 9), Beets (Jan 9), Dill (Jan 9), Peas (Jan 9), Radish (Jan 9), Spinach (Jan 9), +1 more. Plant: Strawberry (Jan 30). |
| February | Start indoors: Bok Choy (Feb 6), Corn (Feb 6), Cosmos (Feb 6), Nasturtiums (Feb 6), Okra (Feb 6), Zinnias (Feb 6), +9 more. Direct sow from: Cilantro (Feb 6), Turnip (Feb 6), Carrots (Feb 13), Potatoes (Feb 20). Transplant from: Broccoli (Feb 6), Brussel Sprouts (Feb 6), Cabbage (Feb 6), Collards (Feb 6), Kale (Feb 6), Lettuce (Feb 6), +6 more. |
| March | Direct sow from: Sunflowers (Mar 6), Beans (Mar 13), Pole Beans (Mar 13). Transplant from: Cosmos (Mar 6), Lavender (Mar 6), Marigolds (Mar 6), Mint (Mar 6), Nasturtiums (Mar 6), Zinnias (Mar 6), +23 more. Last frost around March 6. |
| April | Frost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini. |
| 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 20), Pumpkin (Jul 20), Cantaloupe (Jul 28), Celery (Jul 28), Melons (Jul 28), Spaghetti Squash (Jul 30). |
| August | Last sowing dates: Tomato (Aug 2), Watermelon (Aug 2), Pepper (Aug 7), Tomatillos (Aug 7), Eggplant (Aug 12), Corn (Aug 14), +3 more. |
| September | Last sowing dates: Basil (Sep 5), Cosmos (Sep 5), Cucumber (Sep 5), Zinnias (Sep 5), Broccoli (Sep 6), Nasturtiums (Sep 10), +10 more. |
| October | Last sowing dates: Beets (Oct 1), Dill (Oct 1), Swiss Chard (Oct 1), Calendula (Oct 6), Cilantro (Oct 6), Collards (Oct 10), +9 more. |
| November | First fall frost approaching (around December 2). Transplant fall brassicas. Sow spinach, arugula, and radishes. |
| December | Start indoors: Chives (Dec 12), Lavender (Dec 12), Onion (Dec 12), Rosemary (Dec 12), Celery (Dec 26), Collards (Dec 26), +5 more. Direct sow from: Garlic (Dec 2). First frost around December 2. Last sowing dates: Garlic (Dec 23). |
Frequently Asked Questions
What is the last frost date for Oroville, CA (ZIP 95965)?
The median last spring frost date for Oroville, CA (ZIP code 95965) is around March 6. 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 14; one in ten it runs past April 14.
What is the first fall frost date in Oroville, CA?
The median first fall frost date for Oroville, CA is around December 2. 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 2 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Oroville, CA?
The frost-free growing season in Oroville is about 271 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 Oroville (271 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 Oroville, CA?
Oroville, 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 Oroville, CA?
Start tomatoes indoors Jan 30 and plant out Mar 20 in Oroville. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Oroville?
Two: plant Feb 6 and again by Oct 11; both mature before Dec 9.
When do I plant garlic in Oroville?
Dec 2 to Dec 23; it overwinters and is ready the following summer.
Can I get two tomato crops in Oroville?
Yes: plant out Mar 20 for a summer crop, and set out a second round of transplants by Aug 2 for a fall crop.
Which nearby ZIP has a longer season?
Gridley (ZIP 95948) has 295 frost-free days, 24 more than Oroville (ZIP 95965). See Gridley ZIP 95948 frost dates
Nearby and related
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