Frost Dates for Corvallis, OR 97333
Corvallis has 3 ZIP codes. The Corvallis, OR frost page lists all of them with their dates.
Last spring frost April 22 · First fall frost October 27 · 188 frost-free days · USDA Zone 8b
ZIP 97333 has about 23,900 people, one of 3 ZIP codes in Corvallis.
Long season: 188 frost-free days. Spring frost risk spans March 31–May 12 (42 days). Fall frost risk spans October 4–November 18 (45 days).
Frost probability for 97333
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 12 | April 22 | March 31 |
| Fall (first frost) | October 4 | October 27 | November 18 |
Dates come from NOAA 1971–2000 freeze probabilities at EUGENE-MAHLON SWEET FLD (38.5 km away); the 50% date is the median year.
Which crops fit a 188-day season in Corvallis
In Corvallis (188 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 18 | May 6–May 13 | 146 | fits: 80 days to maturity, 146 available after May 6. | Jun 27 |
| Pepper | Mar 11 | May 6–May 13 | 146 | fits: 75 days to maturity, 146 available after May 6. | Jul 2 |
| Lettuce | Feb 25 | Mar 25–Apr 1 | 223 | two-plantings: Plant Mar 25 and again by Sep 5; both mature before Nov 3. | Sep 5 |
| Carrots | — | Apr 1–Apr 8 | 230 | fits: 70 days to maturity, 230 available after Apr 1. | Aug 25 |
| Cucumber | Apr 1 | May 6–May 13 | 160 | two-plantings: Plant May 6 and again by Jul 31; both mature before Oct 13. | Jul 31 |
| Beans | — | Apr 29–May 13 | 174 | two-plantings: Plant Apr 29 and again by Aug 7; both mature before Oct 20. | Aug 7 |
| Peas | — | Feb 25–May 6 | 251 | fits: 65 days to maturity, 251 available after Feb 25. | Aug 16 |
| Zucchini | Apr 8 | May 6–May 13 | 160 | two-plantings: Plant May 6 and again by Aug 5; both mature before Oct 13. | Aug 5 |
| Onion | Jan 28 | Mar 25–Apr 8 | 223 | fits: 100 days to maturity, 223 available after Mar 25. | — |
| Spinach | — | Feb 25–Apr 15 | 265 | two-plantings: Plant Feb 25 and again by Sep 24; both mature before Nov 17. | Sep 24 |
| Kale | Feb 11 | Mar 25–Apr 8 | 237 | two-plantings: Plant Mar 25 and again by Sep 9; both mature before Nov 17. | Sep 9 |
| Broccoli | Feb 25 | Mar 25–Apr 8 | 223 | fits: 80 days to maturity, 223 available after Mar 25. | Aug 1 |
| Cabbage | Feb 25 | Mar 25–Apr 8 | 237 | fits: 70 days to maturity, 237 available after Mar 25. | Aug 25 |
| Radish | — | Feb 25–May 20 | 251 | two-plantings: Plant Feb 25 and again by Sep 25; both mature before Nov 3. | Sep 25 |
| Beets | — | Feb 25–May 20 | 251 | two-plantings: Plant Feb 25 and again by Aug 26; both mature before Nov 3. | Aug 26 |
| Potatoes | — | Apr 8–Apr 15 | 209 | fits: 90 days to maturity, 209 available after Apr 8. | — |
| Garlic | — | Oct 27 | 293 | overwinter: Plant Oct 27 to Nov 17; harvest the following summer. | Nov 17 |
| Strawberry | — | Mar 18–May 13 | 244 | perennial: A perennial: plant Mar 18; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 25 | Apr 29–May 6 | 160 | fits: 75 days to maturity, 160 available after Apr 29. | Jul 9 |
| Pumpkin | Apr 8 | May 6–May 6 | 153 | fits: 100 days to maturity, 153 available after May 6. | Jun 14 |
| Cauliflower | Mar 11 | Apr 15–Apr 29 | 202 | fits: 75 days to maturity, 202 available after Apr 15. | Aug 6 |
| Swiss Chard | Feb 25 | Apr 8–Apr 8 | 209 | two-plantings: Plant Apr 8 and again by Aug 26; both mature before Nov 3. | Aug 26 |
| Arugula | — | Feb 25–May 20 | 265 | two-plantings: Plant Feb 25 and again by Sep 24; both mature before Nov 17. | Sep 24 |
| Brussel Sprouts | Feb 25 | Mar 25–Apr 8 | 237 | fits: 100 days to maturity, 237 available after Mar 25. | Jul 26 |
| Butternut Squash | Apr 8 | May 6–May 13 | 153 | fits: 100 days to maturity, 153 available after May 6. | Jun 14 |
| Eggplant | Mar 4 | May 6–May 13 | 146 | fits: 70 days to maturity, 146 available after May 6. | Jul 7 |
| Okra | Mar 25 | Apr 29–May 6 | 167 | two-plantings: Plant Apr 29 and again by Aug 5; both mature before Oct 13. | Aug 5 |
| Basil | Mar 18 | May 13–May 13 | 153 | two-plantings: Plant May 13 and again by Jul 31; both mature before Oct 13. | Jul 31 |
| Cilantro | — | Mar 25–Apr 15 | 223 | two-plantings: Plant Mar 25 and again by Aug 31; both mature before Nov 3. | Aug 31 |
| Parsley | Feb 11 | Apr 29–May 6 | 188 | fits: 70 days to maturity, 188 available after Apr 29. | Aug 11 |
| Celery | Feb 11 | Apr 29–May 13 | 188 | fits: 120 days to maturity, 188 available after Apr 29. | Jun 22 |
| Scallions | Feb 11 | Mar 25–Apr 8 | 237 | two-plantings: Plant Mar 25 and again by Sep 4; both mature before Nov 17. | Sep 4 |
| Turnip | — | Mar 25–Apr 8 | 237 | two-plantings: Plant Mar 25 and again by Sep 14; both mature before Nov 17. | Sep 14 |
| Kohlrabi | — | Mar 11–Mar 25 | 251 | two-plantings: Plant Mar 11 and again by Sep 9; both mature before Nov 17. | Sep 9 |
| Bok Choy | Mar 25 | Apr 15–Apr 22 | 202 | two-plantings: Plant Apr 15 and again by Sep 5; both mature before Nov 3. | Sep 5 |
| Collards | Feb 11 | Mar 25–Apr 8 | 237 | two-plantings: Plant Mar 25 and again by Sep 4; both mature before Nov 17. | Sep 4 |
| Cantaloupe | Apr 8 | May 6–May 13 | 146 | fits: 85 days to maturity, 146 available after May 6. | Jun 22 |
| Chives | Jan 28 | Apr 29–May 6 | 202 | fits: 90 days to maturity, 202 available after Apr 29. | — |
| Dill | — | Feb 25–May 20 | 251 | two-plantings: Plant Feb 25 and again by Aug 26; both mature before Nov 3. | Aug 26 |
| Oregano | Feb 11 | Apr 29–May 6 | 202 | fits: 80 days to maturity, 202 available after Apr 29. | — |
| Rosemary | Jan 28 | Apr 29–May 6 | 188 | fits: 80 days to maturity, 188 available after Apr 29. | — |
| Sage | Feb 25 | Apr 29–May 6 | 202 | fits: 75 days to maturity, 202 available after Apr 29. | — |
| Thyme | Feb 11 | Apr 29–May 6 | 202 | fits: 90 days to maturity, 202 available after Apr 29. | — |
| Calendula | Mar 11 | Apr 8–Apr 22 | 209 | two-plantings: Plant Apr 8 and again by Aug 31; both mature before Nov 3. | Aug 31 |
| Cosmos | Mar 25 | Apr 22–May 6 | 174 | two-plantings: Plant Apr 22 and again by Jul 31; both mature before Oct 13. | Jul 31 |
| Lavender | Jan 28 | Apr 22–May 6 | 209 | fits: 90 days to maturity, 209 available after Apr 22. | — |
| Marigolds | Mar 11 | Apr 22–Apr 29 | 174 | two-plantings: Plant Apr 22 and again by Aug 10; both mature before Oct 13. | Aug 10 |
| Melons | Apr 8 | May 6–May 13 | 146 | fits: 85 days to maturity, 146 available after May 6. | Jun 22 |
| Mint | — | Apr 22–May 6 | 209 | fits: 90 days to maturity, 209 available after Apr 22. | — |
| Nasturtiums | Mar 25 | Apr 22–Apr 29 | 174 | two-plantings: Plant Apr 22 and again by Aug 5; both mature before Oct 13. | Aug 5 |
| Pole Beans | — | Apr 29–May 13 | 167 | fits: 65 days to maturity, 167 available after Apr 29. | Jul 26 |
| Spaghetti Squash | Apr 8 | May 6–May 13 | 153 | fits: 90 days to maturity, 153 available after May 6. | Jun 24 |
| Sunflowers | — | Apr 22–May 6 | 174 | fits: 70 days to maturity, 174 available after Apr 22. | Jul 21 |
| Tomatillos | Feb 25 | Apr 29–May 6 | 153 | fits: 75 days to maturity, 153 available after Apr 29. | Jul 2 |
| Watermelon | Apr 8 | Apr 29–May 6 | 153 | fits: 80 days to maturity, 153 available after Apr 29. | Jun 27 |
| Yellow Squash | Apr 8 | May 6–May 13 | 160 | two-plantings: Plant May 6 and again by Aug 5; both mature before Oct 13. | Aug 5 |
| Zinnias | Mar 25 | Apr 22–May 6 | 174 | two-plantings: Plant Apr 22 and again by Jul 31; both mature before Oct 13. | Jul 31 |
Month by month in Corvallis
| Month | What to do |
|---|---|
| January | Start indoors: Chives (Jan 28), Lavender (Jan 28), Onion (Jan 28), Rosemary (Jan 28). |
| February | Start indoors: Celery (Feb 11), Collards (Feb 11), Kale (Feb 11), Oregano (Feb 11), Parsley (Feb 11), Scallions (Feb 11), +8 more. Direct sow from: Arugula (Feb 25), Beets (Feb 25), Dill (Feb 25), Peas (Feb 25), Radish (Feb 25), Spinach (Feb 25). |
| March | Start indoors: Eggplant (Mar 4), Calendula (Mar 11), Cauliflower (Mar 11), Marigolds (Mar 11), Pepper (Mar 11), Basil (Mar 18), +7 more. Direct sow from: Kohlrabi (Mar 11), Cilantro (Mar 25), Turnip (Mar 25). Transplant from: Broccoli (Mar 25), Brussel Sprouts (Mar 25), Cabbage (Mar 25), Collards (Mar 25), Kale (Mar 25), Lettuce (Mar 25), +2 more. Plant: Strawberry (Mar 18). |
| April | Start indoors: Cucumber (Apr 1), Butternut Squash (Apr 8), Cantaloupe (Apr 8), Melons (Apr 8), Pumpkin (Apr 8), Spaghetti Squash (Apr 8), +3 more. Direct sow from: Carrots (Apr 1), Potatoes (Apr 8), Sunflowers (Apr 22), Beans (Apr 29), Pole Beans (Apr 29). Transplant from: Calendula (Apr 8), Swiss Chard (Apr 8), Bok Choy (Apr 15), Cauliflower (Apr 15), Cosmos (Apr 22), Lavender (Apr 22), +15 more. Last frost around April 22. |
| May | Transplant from: Butternut Squash (May 6), Cantaloupe (May 6), Cucumber (May 6), Eggplant (May 6), Melons (May 6), Pepper (May 6), +6 more. |
| June | Last sowing dates: Butternut Squash (Jun 14), Pumpkin (Jun 14), Cantaloupe (Jun 22), Celery (Jun 22), Melons (Jun 22), Spaghetti Squash (Jun 24), +2 more. |
| July | Last sowing dates: Pepper (Jul 2), Tomatillos (Jul 2), Eggplant (Jul 7), Corn (Jul 9), Sunflowers (Jul 21), Brussel Sprouts (Jul 26), +5 more. |
| August | Last sowing dates: Broccoli (Aug 1), Nasturtiums (Aug 5), Okra (Aug 5), Yellow Squash (Aug 5), Zucchini (Aug 5), Cauliflower (Aug 6), +11 more. |
| September | Last sowing dates: Collards (Sep 4), Scallions (Sep 4), Bok Choy (Sep 5), Lettuce (Sep 5), Kale (Sep 9), Kohlrabi (Sep 9), +4 more. |
| October | Direct sow from: Garlic (Oct 27). First frost around October 27. |
| November | Last sowing dates: Garlic (Nov 17). |
| December | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
Frequently Asked Questions
What is the last frost date for Corvallis, OR (ZIP 97333)?
The median last spring frost date for Corvallis, OR (ZIP code 97333) is around April 22. 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 31; one in ten it runs past May 12.
What is the first fall frost date in Corvallis, OR?
The median first fall frost date for Corvallis, OR is around October 27. 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 4 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Corvallis, OR?
The frost-free growing season in Corvallis is about 188 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 Corvallis (188 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 Corvallis, OR?
Corvallis, OR is in USDA hardiness zone 8b (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 Corvallis, OR?
Start tomatoes indoors Mar 18 and plant out May 6 in Corvallis. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Corvallis?
Two: plant Mar 25 and again by Sep 5; both mature before Nov 3.
When do I plant garlic in Corvallis?
Oct 27 to Nov 17; it overwinters and is ready the following summer.
Can I get two tomato crops in Corvallis?
Yes: plant out May 6 for a summer crop, and set out a second round of transplants by Jun 27 for a fall crop.
Which nearby ZIP has a longer season?
Lebanon (ZIP 97355) has 202 frost-free days, 14 more than Corvallis (ZIP 97333). See Lebanon ZIP 97355 frost dates
Nearby and related
- Frost dates for Corvallis, OR 97330 (11.4 mi)
- Frost dates for Albany, OR 97322 (17.6 mi)
- Frost dates for Junction City, OR 97448 (18.2 mi)
- Frost dates for Monmouth, OR 97361 (20.7 mi)
- Frost dates for Lebanon, OR 97355 (24.4 mi)
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