Frost Dates for Kelseyville, CA 95451
Last spring frost April 11 · First fall frost November 3 · 206 frost-free days · USDA Zone 9b
ZIP 95451 has about 12,600 people.
Long season: 206 frost-free days. Spring frost risk spans March 16–May 6 (51 days). Fall frost risk spans October 15–November 14 (30 days).
Frost probability for 95451
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 6 | April 11 | March 16 |
| Fall (first frost) | October 15 | November 3 | November 14 |
Dates come from NOAA 1971–2000 freeze probabilities at CLEARLAKE 4 SE (20.6 km away); the 50% date is the median year.
Which crops fit a 206-day season in Kelseyville
In Kelseyville (206 frost-free days, a 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 | Mar 7 | Apr 25–May 2 | 164 | fits: 80 days to maturity, 164 available after Apr 25. | Jul 4 |
| Pepper | Feb 28 | Apr 25–May 2 | 164 | fits: 75 days to maturity, 164 available after Apr 25. | Jul 9 |
| Lettuce | Feb 14 | Mar 14–Mar 21 | 241 | two-plantings: Plant Mar 14 and again by Sep 12; both mature before Nov 10. | Sep 12 |
| Carrots | — | Mar 21–Mar 28 | 248 | fits: 70 days to maturity, 248 available after Mar 21. | Sep 1 |
| Cucumber | Mar 21 | Apr 25–May 2 | 178 | two-plantings: Plant Apr 25 and again by Aug 7; both mature before Oct 20. | Aug 7 |
| Beans | — | Apr 18–May 2 | 192 | two-plantings: Plant Apr 18 and again by Aug 14; both mature before Oct 27. | Aug 14 |
| Peas | — | Feb 14–Apr 25 | 269 | fits: 65 days to maturity, 269 available after Feb 14. | Aug 23 |
| Zucchini | Mar 28 | Apr 25–May 2 | 178 | two-plantings: Plant Apr 25 and again by Aug 12; both mature before Oct 20. | Aug 12 |
| Onion | Jan 17 | Mar 14–Mar 28 | 241 | fits: 100 days to maturity, 241 available after Mar 14. | — |
| Spinach | — | Feb 14–Apr 4 | 283 | two-plantings: Plant Feb 14 and again by Oct 1; both mature before Nov 24. | Oct 1 |
| Kale | Jan 31 | Mar 14–Mar 28 | 255 | two-plantings: Plant Mar 14 and again by Sep 16; both mature before Nov 24. | Sep 16 |
| Broccoli | Feb 14 | Mar 14–Mar 28 | 241 | fits: 80 days to maturity, 241 available after Mar 14. | Aug 8 |
| Cabbage | Feb 14 | Mar 14–Mar 28 | 255 | fits: 70 days to maturity, 255 available after Mar 14. | Sep 1 |
| Radish | — | Feb 14–May 9 | 269 | two-plantings: Plant Feb 14 and again by Oct 2; both mature before Nov 10. | Oct 2 |
| Beets | — | Feb 14–May 9 | 269 | two-plantings: Plant Feb 14 and again by Sep 2; both mature before Nov 10. | Sep 2 |
| Potatoes | — | Mar 28–Apr 4 | 227 | fits: 90 days to maturity, 227 available after Mar 28. | — |
| Garlic | — | Nov 3 | 311 | overwinter: Plant Nov 3 to Nov 24; harvest the following summer. | Nov 24 |
| Strawberry | — | Mar 7–May 2 | 262 | perennial: A perennial: plant Mar 7; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 14 | Apr 18–Apr 25 | 178 | fits: 75 days to maturity, 178 available after Apr 18. | Jul 16 |
| Pumpkin | Mar 28 | Apr 25–Apr 25 | 171 | fits: 100 days to maturity, 171 available after Apr 25. | Jun 21 |
| Cauliflower | Feb 28 | Apr 4–Apr 18 | 220 | fits: 75 days to maturity, 220 available after Apr 4. | Aug 13 |
| Swiss Chard | Feb 14 | Mar 28–Mar 28 | 227 | two-plantings: Plant Mar 28 and again by Sep 2; both mature before Nov 10. | Sep 2 |
| Arugula | — | Feb 14–May 9 | 283 | two-plantings: Plant Feb 14 and again by Oct 1; both mature before Nov 24. | Oct 1 |
| Brussel Sprouts | Feb 14 | Mar 14–Mar 28 | 255 | fits: 100 days to maturity, 255 available after Mar 14. | Aug 2 |
| Butternut Squash | Mar 28 | Apr 25–May 2 | 171 | fits: 100 days to maturity, 171 available after Apr 25. | Jun 21 |
| Eggplant | Feb 21 | Apr 25–May 2 | 164 | fits: 70 days to maturity, 164 available after Apr 25. | Jul 14 |
| Okra | Mar 14 | Apr 18–Apr 25 | 185 | two-plantings: Plant Apr 18 and again by Aug 12; both mature before Oct 20. | Aug 12 |
| Basil | Mar 7 | May 2–May 2 | 171 | two-plantings: Plant May 2 and again by Aug 7; both mature before Oct 20. | Aug 7 |
| Cilantro | — | Mar 14–Apr 4 | 241 | two-plantings: Plant Mar 14 and again by Sep 7; both mature before Nov 10. | Sep 7 |
| Parsley | Jan 31 | Apr 18–Apr 25 | 206 | fits: 70 days to maturity, 206 available after Apr 18. | Aug 18 |
| Celery | Jan 31 | Apr 18–May 2 | 206 | fits: 120 days to maturity, 206 available after Apr 18. | Jun 29 |
| Scallions | Jan 31 | Mar 14–Mar 28 | 255 | two-plantings: Plant Mar 14 and again by Sep 11; both mature before Nov 24. | Sep 11 |
| Turnip | — | Mar 14–Mar 28 | 255 | two-plantings: Plant Mar 14 and again by Sep 21; both mature before Nov 24. | Sep 21 |
| Kohlrabi | — | Feb 28–Mar 14 | 269 | two-plantings: Plant Feb 28 and again by Sep 16; both mature before Nov 24. | Sep 16 |
| Bok Choy | Mar 14 | Apr 4–Apr 11 | 220 | two-plantings: Plant Apr 4 and again by Sep 12; both mature before Nov 10. | Sep 12 |
| Collards | Jan 31 | Mar 14–Mar 28 | 255 | two-plantings: Plant Mar 14 and again by Sep 11; both mature before Nov 24. | Sep 11 |
| Cantaloupe | Mar 28 | Apr 25–May 2 | 164 | fits: 85 days to maturity, 164 available after Apr 25. | Jun 29 |
| Chives | Jan 17 | Apr 18–Apr 25 | 220 | fits: 90 days to maturity, 220 available after Apr 18. | — |
| Dill | — | Feb 14–May 9 | 269 | two-plantings: Plant Feb 14 and again by Sep 2; both mature before Nov 10. | Sep 2 |
| Oregano | Jan 31 | Apr 18–Apr 25 | 220 | fits: 80 days to maturity, 220 available after Apr 18. | — |
| Rosemary | Jan 17 | Apr 18–Apr 25 | 206 | fits: 80 days to maturity, 206 available after Apr 18. | — |
| Sage | Feb 14 | Apr 18–Apr 25 | 220 | fits: 75 days to maturity, 220 available after Apr 18. | — |
| Thyme | Jan 31 | Apr 18–Apr 25 | 220 | fits: 90 days to maturity, 220 available after Apr 18. | — |
| Calendula | Feb 28 | Mar 28–Apr 11 | 227 | two-plantings: Plant Mar 28 and again by Sep 7; both mature before Nov 10. | Sep 7 |
| Cosmos | Mar 14 | Apr 11–Apr 25 | 192 | two-plantings: Plant Apr 11 and again by Aug 7; both mature before Oct 20. | Aug 7 |
| Lavender | Jan 17 | Apr 11–Apr 25 | 227 | fits: 90 days to maturity, 227 available after Apr 11. | — |
| Marigolds | Feb 28 | Apr 11–Apr 18 | 192 | two-plantings: Plant Apr 11 and again by Aug 17; both mature before Oct 20. | Aug 17 |
| Melons | Mar 28 | Apr 25–May 2 | 164 | fits: 85 days to maturity, 164 available after Apr 25. | Jun 29 |
| Mint | — | Apr 11–Apr 25 | 227 | fits: 90 days to maturity, 227 available after Apr 11. | — |
| Nasturtiums | Mar 14 | Apr 11–Apr 18 | 192 | two-plantings: Plant Apr 11 and again by Aug 12; both mature before Oct 20. | Aug 12 |
| Pole Beans | — | Apr 18–May 2 | 185 | fits: 65 days to maturity, 185 available after Apr 18. | Aug 2 |
| Spaghetti Squash | Mar 28 | Apr 25–May 2 | 171 | fits: 90 days to maturity, 171 available after Apr 25. | Jul 1 |
| Sunflowers | — | Apr 11–Apr 25 | 192 | fits: 70 days to maturity, 192 available after Apr 11. | Jul 28 |
| Tomatillos | Feb 14 | Apr 18–Apr 25 | 171 | fits: 75 days to maturity, 171 available after Apr 18. | Jul 9 |
| Watermelon | Mar 28 | Apr 18–Apr 25 | 171 | fits: 80 days to maturity, 171 available after Apr 18. | Jul 4 |
| Yellow Squash | Mar 28 | Apr 25–May 2 | 178 | two-plantings: Plant Apr 25 and again by Aug 12; both mature before Oct 20. | Aug 12 |
| Zinnias | Mar 14 | Apr 11–Apr 25 | 192 | two-plantings: Plant Apr 11 and again by Aug 7; both mature before Oct 20. | Aug 7 |
Month by month in Kelseyville
| Month | What to do |
|---|---|
| January | Start indoors: Chives (Jan 17), Lavender (Jan 17), Onion (Jan 17), Rosemary (Jan 17), Celery (Jan 31), Collards (Jan 31), +5 more. |
| February | Start indoors: Broccoli (Feb 14), Brussel Sprouts (Feb 14), Cabbage (Feb 14), Lettuce (Feb 14), Sage (Feb 14), Swiss Chard (Feb 14), +6 more. Direct sow from: Arugula (Feb 14), Beets (Feb 14), Dill (Feb 14), Peas (Feb 14), Radish (Feb 14), Spinach (Feb 14), +1 more. |
| March | Start indoors: Basil (Mar 7), Tomato (Mar 7), Bok Choy (Mar 14), Corn (Mar 14), Cosmos (Mar 14), Nasturtiums (Mar 14), +11 more. Direct sow from: Cilantro (Mar 14), Turnip (Mar 14), Carrots (Mar 21), Potatoes (Mar 28). Transplant from: Broccoli (Mar 14), Brussel Sprouts (Mar 14), Cabbage (Mar 14), Collards (Mar 14), Kale (Mar 14), Lettuce (Mar 14), +4 more. Plant: Strawberry (Mar 7). |
| April | Direct sow from: Sunflowers (Apr 11), Beans (Apr 18), Pole Beans (Apr 18). Transplant from: Bok Choy (Apr 4), Cauliflower (Apr 4), Cosmos (Apr 11), Lavender (Apr 11), Marigolds (Apr 11), Mint (Apr 11), +24 more. Last frost around April 11. |
| May | Transplant from: Basil (May 2). |
| June | Last sowing dates: Butternut Squash (Jun 21), Pumpkin (Jun 21), Cantaloupe (Jun 29), Celery (Jun 29), Melons (Jun 29). |
| July | Last sowing dates: Spaghetti Squash (Jul 1), Tomato (Jul 4), Watermelon (Jul 4), Pepper (Jul 9), Tomatillos (Jul 9), Eggplant (Jul 14), +2 more. |
| August | Last sowing dates: Brussel Sprouts (Aug 2), Pole Beans (Aug 2), Basil (Aug 7), Cosmos (Aug 7), Cucumber (Aug 7), Zinnias (Aug 7), +10 more. |
| September | Last sowing dates: Cabbage (Sep 1), Carrots (Sep 1), Beets (Sep 2), Dill (Sep 2), Swiss Chard (Sep 2), Calendula (Sep 7), +8 more. |
| October | Last sowing dates: Arugula (Oct 1), Spinach (Oct 1), Radish (Oct 2). |
| November | Direct sow from: Garlic (Nov 3). First frost around November 3. Last sowing dates: Garlic (Nov 24). |
| December | Harvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year. |
Frequently Asked Questions
What is the last frost date for Kelseyville, CA (ZIP 95451)?
The median last spring frost date for Kelseyville, CA (ZIP code 95451) is around April 11. 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 March 16; one in ten it runs past May 6.
What is the first fall frost date in Kelseyville, CA?
The median first fall frost date for Kelseyville, CA is around November 3. 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 October 15 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Kelseyville, CA?
The frost-free growing season in Kelseyville is about 206 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 Kelseyville (206 frost-free days, a long season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Kelseyville, CA?
Kelseyville, 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 Kelseyville, CA?
Start tomatoes indoors Mar 7 and plant out Apr 25 in Kelseyville. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Kelseyville?
Two: plant Mar 14 and again by Sep 12; both mature before Nov 10.
When do I plant garlic in Kelseyville?
Nov 3 to Nov 24; it overwinters and is ready the following summer.
Can I get two tomato crops in Kelseyville?
Yes: plant out Apr 25 for a summer crop, and set out a second round of transplants by Jul 4 for a fall crop.
Which nearby ZIP has a longer season?
Lakeport (ZIP 95453) has 243 frost-free days, 37 more than Kelseyville (ZIP 95451). See Lakeport ZIP 95453 frost dates
Nearby and related
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