Frost Dates for Grover Beach, CA 93433
Last spring frost January 24 · First fall frost December 29 · 339 frost-free days · USDA Zone 10a
ZIP 93433 has about 12,600 people.
Very long season: 339 frost-free days.
Frost probability for 93433
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | March 29 | January 24 | — |
| Fall (first frost) | November 10 | December 29 | — |
Dates come from NOAA 1971–2000 freeze probabilities at SAN LUIS OBISPO POLY (21.0 km away); the 50% date is the median year.
Which crops fit a 339-day season in Grover Beach
In Grover Beach (339 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 | 297 | fits: 80 days to maturity, 297 available after Feb 7. | Aug 29 |
| Pepper | Dec 13 | Feb 7–Feb 14 | 297 | fits: 75 days to maturity, 297 available after Feb 7. | Sep 3 |
| Lettuce | Nov 29 | Dec 27–Jan 3 | 374 | two-plantings: Plant Dec 27 and again by Nov 7; both mature before Jan 5. | Nov 7 |
| Carrots | — | Jan 3–Jan 10 | 381 | fits: 70 days to maturity, 381 available after Jan 3. | Oct 27 |
| Cucumber | Jan 3 | Feb 7–Feb 14 | 311 | two-plantings: Plant Feb 7 and again by Oct 2; both mature before Dec 15. | Oct 2 |
| Beans | — | Jan 31–Feb 14 | 325 | two-plantings: Plant Jan 31 and again by Oct 9; both mature before Dec 22. | Oct 9 |
| Peas | — | Nov 29–Feb 7 | 402 | fits: 65 days to maturity, 402 available after Nov 29. | Oct 18 |
| Zucchini | Jan 10 | Feb 7–Feb 14 | 311 | two-plantings: Plant Feb 7 and again by Oct 7; both mature before Dec 15. | Oct 7 |
| Onion | Nov 1 | Dec 27–Jan 10 | 374 | fits: 100 days to maturity, 374 available after Dec 27. | — |
| Spinach | — | Nov 29–Jan 17 | 416 | two-plantings: Plant Nov 29 and again by Nov 26; both mature before Jan 19. | Nov 26 |
| Kale | Nov 15 | Dec 27–Jan 10 | 388 | two-plantings: Plant Dec 27 and again by Nov 11; both mature before Jan 19. | Nov 11 |
| Broccoli | Nov 29 | Dec 27–Jan 10 | 374 | fits: 80 days to maturity, 374 available after Dec 27. | Oct 3 |
| Cabbage | Nov 29 | Dec 27–Jan 10 | 388 | fits: 70 days to maturity, 388 available after Dec 27. | Oct 27 |
| Radish | — | Nov 29–Feb 21 | 402 | two-plantings: Plant Nov 29 and again by Nov 27; both mature before Jan 5. | Nov 27 |
| Beets | — | Nov 29–Feb 21 | 402 | two-plantings: Plant Nov 29 and again by Oct 28; both mature before Jan 5. | Oct 28 |
| Potatoes | — | Jan 10–Jan 17 | 360 | fits: 90 days to maturity, 360 available after Jan 10. | — |
| Garlic | — | Dec 29 | 444 | overwinter: Plant Dec 29 to Jan 19; harvest the following summer. | Jan 19 |
| Strawberry | — | Dec 20–Feb 14 | 395 | 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 | 311 | fits: 75 days to maturity, 311 available after Jan 31. | Sep 10 |
| Pumpkin | Jan 10 | Feb 7–Feb 7 | 304 | fits: 100 days to maturity, 304 available after Feb 7. | Aug 16 |
| Cauliflower | Dec 13 | Jan 17–Jan 31 | 353 | fits: 75 days to maturity, 353 available after Jan 17. | Oct 8 |
| Swiss Chard | Nov 29 | Jan 10–Jan 10 | 360 | two-plantings: Plant Jan 10 and again by Oct 28; both mature before Jan 5. | Oct 28 |
| Arugula | — | Nov 29–Feb 21 | 416 | two-plantings: Plant Nov 29 and again by Nov 26; both mature before Jan 19. | Nov 26 |
| Brussel Sprouts | Nov 29 | Dec 27–Jan 10 | 388 | fits: 100 days to maturity, 388 available after Dec 27. | Sep 27 |
| Butternut Squash | Jan 10 | Feb 7–Feb 14 | 304 | fits: 100 days to maturity, 304 available after Feb 7. | Aug 16 |
| Eggplant | Dec 6 | Feb 7–Feb 14 | 297 | fits: 70 days to maturity, 297 available after Feb 7. | Sep 8 |
| Okra | Dec 27 | Jan 31–Feb 7 | 318 | two-plantings: Plant Jan 31 and again by Oct 7; both mature before Dec 15. | Oct 7 |
| Basil | Dec 20 | Feb 14–Feb 14 | 304 | two-plantings: Plant Feb 14 and again by Oct 2; both mature before Dec 15. | Oct 2 |
| Cilantro | — | Dec 27–Jan 17 | 374 | two-plantings: Plant Dec 27 and again by Nov 2; both mature before Jan 5. | Nov 2 |
| Parsley | Nov 15 | Jan 31–Feb 7 | 339 | fits: 70 days to maturity, 339 available after Jan 31. | Oct 13 |
| Celery | Nov 15 | Jan 31–Feb 14 | 339 | fits: 120 days to maturity, 339 available after Jan 31. | Aug 24 |
| Scallions | Nov 15 | Dec 27–Jan 10 | 388 | two-plantings: Plant Dec 27 and again by Nov 6; both mature before Jan 19. | Nov 6 |
| Turnip | — | Dec 27–Jan 10 | 388 | two-plantings: Plant Dec 27 and again by Nov 16; both mature before Jan 19. | Nov 16 |
| Kohlrabi | — | Dec 13–Dec 27 | 402 | two-plantings: Plant Dec 13 and again by Nov 11; both mature before Jan 19. | Nov 11 |
| Bok Choy | Dec 27 | Jan 17–Jan 24 | 353 | two-plantings: Plant Jan 17 and again by Nov 7; both mature before Jan 5. | Nov 7 |
| Collards | Nov 15 | Dec 27–Jan 10 | 388 | two-plantings: Plant Dec 27 and again by Nov 6; both mature before Jan 19. | Nov 6 |
| Cantaloupe | Jan 10 | Feb 7–Feb 14 | 297 | fits: 85 days to maturity, 297 available after Feb 7. | Aug 24 |
| Chives | Nov 1 | Jan 31–Feb 7 | 353 | fits: 90 days to maturity, 353 available after Jan 31. | — |
| Dill | — | Nov 29–Feb 21 | 402 | two-plantings: Plant Nov 29 and again by Oct 28; both mature before Jan 5. | Oct 28 |
| Oregano | Nov 15 | Jan 31–Feb 7 | 353 | fits: 80 days to maturity, 353 available after Jan 31. | — |
| Rosemary | Nov 1 | Jan 31–Feb 7 | 339 | fits: 80 days to maturity, 339 available after Jan 31. | — |
| Sage | Nov 29 | Jan 31–Feb 7 | 353 | fits: 75 days to maturity, 353 available after Jan 31. | — |
| Thyme | Nov 15 | Jan 31–Feb 7 | 353 | fits: 90 days to maturity, 353 available after Jan 31. | — |
| Calendula | Dec 13 | Jan 10–Jan 24 | 360 | two-plantings: Plant Jan 10 and again by Nov 2; both mature before Jan 5. | Nov 2 |
| Cosmos | Dec 27 | Jan 24–Feb 7 | 325 | two-plantings: Plant Jan 24 and again by Oct 2; both mature before Dec 15. | Oct 2 |
| Lavender | Nov 1 | Jan 24–Feb 7 | 360 | fits: 90 days to maturity, 360 available after Jan 24. | — |
| Marigolds | Dec 13 | Jan 24–Jan 31 | 325 | two-plantings: Plant Jan 24 and again by Oct 12; both mature before Dec 15. | Oct 12 |
| Melons | Jan 10 | Feb 7–Feb 14 | 297 | fits: 85 days to maturity, 297 available after Feb 7. | Aug 24 |
| Mint | — | Jan 24–Feb 7 | 360 | fits: 90 days to maturity, 360 available after Jan 24. | — |
| Nasturtiums | Dec 27 | Jan 24–Jan 31 | 325 | two-plantings: Plant Jan 24 and again by Oct 7; both mature before Dec 15. | Oct 7 |
| Pole Beans | — | Jan 31–Feb 14 | 318 | fits: 65 days to maturity, 318 available after Jan 31. | Sep 27 |
| Spaghetti Squash | Jan 10 | Feb 7–Feb 14 | 304 | fits: 90 days to maturity, 304 available after Feb 7. | Aug 26 |
| Sunflowers | — | Jan 24–Feb 7 | 325 | fits: 70 days to maturity, 325 available after Jan 24. | Sep 22 |
| Tomatillos | Nov 29 | Jan 31–Feb 7 | 304 | fits: 75 days to maturity, 304 available after Jan 31. | Sep 3 |
| Watermelon | Jan 10 | Jan 31–Feb 7 | 304 | fits: 80 days to maturity, 304 available after Jan 31. | Aug 29 |
| Yellow Squash | Jan 10 | Feb 7–Feb 14 | 311 | two-plantings: Plant Feb 7 and again by Oct 7; both mature before Dec 15. | Oct 7 |
| Zinnias | Dec 27 | Jan 24–Feb 7 | 325 | two-plantings: Plant Jan 24 and again by Oct 2; both mature before Dec 15. | Oct 2 |
Month by month in Grover Beach
| 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 19). |
| 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 16), Pumpkin (Aug 16), Cantaloupe (Aug 24), Celery (Aug 24), Melons (Aug 24), Spaghetti Squash (Aug 26), +2 more. |
| September | Last sowing dates: Pepper (Sep 3), Tomatillos (Sep 3), Eggplant (Sep 8), Corn (Sep 10), Sunflowers (Sep 22), Brussel Sprouts (Sep 27), +1 more. |
| October | Last sowing dates: Basil (Oct 2), Cosmos (Oct 2), Cucumber (Oct 2), Zinnias (Oct 2), Broccoli (Oct 3), Nasturtiums (Oct 7), +13 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: Calendula (Nov 2), Cilantro (Nov 2), Collards (Nov 6), Scallions (Nov 6), Bok Choy (Nov 7), Lettuce (Nov 7), +6 more. |
| 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), Cilantro (Dec 27), Turnip (Dec 27), Garlic (Dec 29). 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 29. |
Frequently Asked Questions
What is the last frost date for Grover Beach, CA (ZIP 93433)?
The median last spring frost date for Grover Beach, CA (ZIP code 93433) 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 Grover Beach, CA?
The median first fall frost date for Grover Beach, CA is around December 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 10 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Grover Beach, CA?
The frost-free growing season in Grover Beach is about 339 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 Grover Beach (339 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 Grover Beach, CA?
Grover Beach, 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 Grover Beach, CA?
Start tomatoes indoors Dec 20 and plant out Feb 7 in Grover Beach. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Grover Beach?
Two: plant Dec 27 and again by Nov 7; both mature before Jan 5.
When do I plant garlic in Grover Beach?
Dec 29 to Jan 19; it overwinters and is ready the following summer.
Can I get two tomato crops in Grover Beach?
Yes: plant out Feb 7 for a summer crop, and set out a second round of transplants by Aug 29 for a fall crop.
Nearby and related
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