Frost Dates for Corvallis, OR 97330
Last spring frost April 24 · First fall frost October 27 · 186 frost-free days · USDA Zone 8b
ZIP 97330 has about 43,900 people, the largest of 3 ZIP codes in Corvallis.
Long season: 186 frost-free days. Spring frost risk spans April 5–May 12 (37 days). Fall frost risk spans October 7–November 18 (42 days).
Frost probability for 97330
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 12 | April 24 | April 5 |
| Fall (first frost) | October 7 | October 27 | November 18 |
Dates come from NOAA 1971–2000 freeze probabilities at CORVALLIS WATER BUREAU (20.3 km away); the 50% date is the median year.
Frost dates by ZIP code in Corvallis, OR
| ZIP | Last spring frost (50%) | First fall frost (50%) | Zone |
|---|---|---|---|
| 97330 | April 24 | October 27 | 8b |
| 97333 | April 22 | October 27 | 8b |
| 97331 | April 24 | October 27 | 8b |
Which crops fit a 186-day season in Corvallis
In Corvallis (186 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 20 | May 8–May 15 | 144 | fits: 80 days to maturity, 144 available after May 8. | Jun 27 |
| Pepper | Mar 13 | May 8–May 15 | 144 | fits: 75 days to maturity, 144 available after May 8. | Jul 2 |
| Lettuce | Feb 27 | Mar 27–Apr 3 | 221 | two-plantings: Plant Mar 27 and again by Sep 5; both mature before Nov 3. | Sep 5 |
| Carrots | — | Apr 3–Apr 10 | 228 | fits: 70 days to maturity, 228 available after Apr 3. | Aug 25 |
| Cucumber | Apr 3 | May 8–May 15 | 158 | two-plantings: Plant May 8 and again by Jul 31; both mature before Oct 13. | Jul 31 |
| Beans | — | May 1–May 15 | 172 | two-plantings: Plant May 1 and again by Aug 7; both mature before Oct 20. | Aug 7 |
| Peas | — | Feb 27–May 8 | 249 | fits: 65 days to maturity, 249 available after Feb 27. | Aug 16 |
| Zucchini | Apr 10 | May 8–May 15 | 158 | two-plantings: Plant May 8 and again by Aug 5; both mature before Oct 13. | Aug 5 |
| Onion | Jan 30 | Mar 27–Apr 10 | 221 | fits: 100 days to maturity, 221 available after Mar 27. | — |
| Spinach | — | Feb 27–Apr 17 | 263 | two-plantings: Plant Feb 27 and again by Sep 24; both mature before Nov 17. | Sep 24 |
| Kale | Feb 13 | Mar 27–Apr 10 | 235 | two-plantings: Plant Mar 27 and again by Sep 9; both mature before Nov 17. | Sep 9 |
| Broccoli | Feb 27 | Mar 27–Apr 10 | 221 | fits: 80 days to maturity, 221 available after Mar 27. | Aug 1 |
| Cabbage | Feb 27 | Mar 27–Apr 10 | 235 | fits: 70 days to maturity, 235 available after Mar 27. | Aug 25 |
| Radish | — | Feb 27–May 22 | 249 | two-plantings: Plant Feb 27 and again by Sep 25; both mature before Nov 3. | Sep 25 |
| Beets | — | Feb 27–May 22 | 249 | two-plantings: Plant Feb 27 and again by Aug 26; both mature before Nov 3. | Aug 26 |
| Potatoes | — | Apr 10–Apr 17 | 207 | fits: 90 days to maturity, 207 available after Apr 10. | — |
| Garlic | — | Oct 27 | 291 | overwinter: Plant Oct 27 to Nov 17; harvest the following summer. | Nov 17 |
| Strawberry | — | Mar 20–May 15 | 242 | perennial: A perennial: plant Mar 20; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 27 | May 1–May 8 | 158 | fits: 75 days to maturity, 158 available after May 1. | Jul 9 |
| Pumpkin | Apr 10 | May 8–May 8 | 151 | fits: 100 days to maturity, 151 available after May 8. | Jun 14 |
| Cauliflower | Mar 13 | Apr 17–May 1 | 200 | fits: 75 days to maturity, 200 available after Apr 17. | Aug 6 |
| Swiss Chard | Feb 27 | Apr 10–Apr 10 | 207 | two-plantings: Plant Apr 10 and again by Aug 26; both mature before Nov 3. | Aug 26 |
| Arugula | — | Feb 27–May 22 | 263 | two-plantings: Plant Feb 27 and again by Sep 24; both mature before Nov 17. | Sep 24 |
| Brussel Sprouts | Feb 27 | Mar 27–Apr 10 | 235 | fits: 100 days to maturity, 235 available after Mar 27. | Jul 26 |
| Butternut Squash | Apr 10 | May 8–May 15 | 151 | fits: 100 days to maturity, 151 available after May 8. | Jun 14 |
| Eggplant | Mar 6 | May 8–May 15 | 144 | fits: 70 days to maturity, 144 available after May 8. | Jul 7 |
| Okra | Mar 27 | May 1–May 8 | 165 | two-plantings: Plant May 1 and again by Aug 5; both mature before Oct 13. | Aug 5 |
| Basil | Mar 20 | May 15–May 15 | 151 | two-plantings: Plant May 15 and again by Jul 31; both mature before Oct 13. | Jul 31 |
| Cilantro | — | Mar 27–Apr 17 | 221 | two-plantings: Plant Mar 27 and again by Aug 31; both mature before Nov 3. | Aug 31 |
| Parsley | Feb 13 | May 1–May 8 | 186 | fits: 70 days to maturity, 186 available after May 1. | Aug 11 |
| Celery | Feb 13 | May 1–May 15 | 186 | fits: 120 days to maturity, 186 available after May 1. | Jun 22 |
| Scallions | Feb 13 | Mar 27–Apr 10 | 235 | two-plantings: Plant Mar 27 and again by Sep 4; both mature before Nov 17. | Sep 4 |
| Turnip | — | Mar 27–Apr 10 | 235 | two-plantings: Plant Mar 27 and again by Sep 14; both mature before Nov 17. | Sep 14 |
| Kohlrabi | — | Mar 13–Mar 27 | 249 | two-plantings: Plant Mar 13 and again by Sep 9; both mature before Nov 17. | Sep 9 |
| Bok Choy | Mar 27 | Apr 17–Apr 24 | 200 | two-plantings: Plant Apr 17 and again by Sep 5; both mature before Nov 3. | Sep 5 |
| Collards | Feb 13 | Mar 27–Apr 10 | 235 | two-plantings: Plant Mar 27 and again by Sep 4; both mature before Nov 17. | Sep 4 |
| Cantaloupe | Apr 10 | May 8–May 15 | 144 | fits: 85 days to maturity, 144 available after May 8. | Jun 22 |
| Chives | Jan 30 | May 1–May 8 | 200 | fits: 90 days to maturity, 200 available after May 1. | — |
| Dill | — | Feb 27–May 22 | 249 | two-plantings: Plant Feb 27 and again by Aug 26; both mature before Nov 3. | Aug 26 |
| Oregano | Feb 13 | May 1–May 8 | 200 | fits: 80 days to maturity, 200 available after May 1. | — |
| Rosemary | Jan 30 | May 1–May 8 | 186 | fits: 80 days to maturity, 186 available after May 1. | — |
| Sage | Feb 27 | May 1–May 8 | 200 | fits: 75 days to maturity, 200 available after May 1. | — |
| Thyme | Feb 13 | May 1–May 8 | 200 | fits: 90 days to maturity, 200 available after May 1. | — |
| Calendula | Mar 13 | Apr 10–Apr 24 | 207 | two-plantings: Plant Apr 10 and again by Aug 31; both mature before Nov 3. | Aug 31 |
| Cosmos | Mar 27 | Apr 24–May 8 | 172 | two-plantings: Plant Apr 24 and again by Jul 31; both mature before Oct 13. | Jul 31 |
| Lavender | Jan 30 | Apr 24–May 8 | 207 | fits: 90 days to maturity, 207 available after Apr 24. | — |
| Marigolds | Mar 13 | Apr 24–May 1 | 172 | two-plantings: Plant Apr 24 and again by Aug 10; both mature before Oct 13. | Aug 10 |
| Melons | Apr 10 | May 8–May 15 | 144 | fits: 85 days to maturity, 144 available after May 8. | Jun 22 |
| Mint | — | Apr 24–May 8 | 207 | fits: 90 days to maturity, 207 available after Apr 24. | — |
| Nasturtiums | Mar 27 | Apr 24–May 1 | 172 | two-plantings: Plant Apr 24 and again by Aug 5; both mature before Oct 13. | Aug 5 |
| Pole Beans | — | May 1–May 15 | 165 | fits: 65 days to maturity, 165 available after May 1. | Jul 26 |
| Spaghetti Squash | Apr 10 | May 8–May 15 | 151 | fits: 90 days to maturity, 151 available after May 8. | Jun 24 |
| Sunflowers | — | Apr 24–May 8 | 172 | fits: 70 days to maturity, 172 available after Apr 24. | Jul 21 |
| Tomatillos | Feb 27 | May 1–May 8 | 151 | fits: 75 days to maturity, 151 available after May 1. | Jul 2 |
| Watermelon | Apr 10 | May 1–May 8 | 151 | fits: 80 days to maturity, 151 available after May 1. | Jun 27 |
| Yellow Squash | Apr 10 | May 8–May 15 | 158 | two-plantings: Plant May 8 and again by Aug 5; both mature before Oct 13. | Aug 5 |
| Zinnias | Mar 27 | Apr 24–May 8 | 172 | two-plantings: Plant Apr 24 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 30), Lavender (Jan 30), Onion (Jan 30), Rosemary (Jan 30). |
| February | Start indoors: Celery (Feb 13), Collards (Feb 13), Kale (Feb 13), Oregano (Feb 13), Parsley (Feb 13), Scallions (Feb 13), +8 more. Direct sow from: Arugula (Feb 27), Beets (Feb 27), Dill (Feb 27), Peas (Feb 27), Radish (Feb 27), Spinach (Feb 27). |
| March | Start indoors: Eggplant (Mar 6), Calendula (Mar 13), Cauliflower (Mar 13), Marigolds (Mar 13), Pepper (Mar 13), Basil (Mar 20), +7 more. Direct sow from: Kohlrabi (Mar 13), Cilantro (Mar 27), Turnip (Mar 27). Transplant from: Broccoli (Mar 27), Brussel Sprouts (Mar 27), Cabbage (Mar 27), Collards (Mar 27), Kale (Mar 27), Lettuce (Mar 27), +2 more. Plant: Strawberry (Mar 20). |
| April | Start indoors: Cucumber (Apr 3), Butternut Squash (Apr 10), Cantaloupe (Apr 10), Melons (Apr 10), Pumpkin (Apr 10), Spaghetti Squash (Apr 10), +3 more. Direct sow from: Carrots (Apr 3), Potatoes (Apr 10), Sunflowers (Apr 24). Transplant from: Calendula (Apr 10), Swiss Chard (Apr 10), Bok Choy (Apr 17), Cauliflower (Apr 17), Cosmos (Apr 24), Lavender (Apr 24), +4 more. Last frost around April 24. |
| May | Direct sow from: Beans (May 1), Pole Beans (May 1). Transplant from: Celery (May 1), Chives (May 1), Corn (May 1), Okra (May 1), Oregano (May 1), Parsley (May 1), +17 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 97330)?
The median last spring frost date for Corvallis, OR (ZIP code 97330) is around April 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. One year in ten frost ends before April 5; 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 7 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 186 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 (186 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 20 and plant out May 8 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 27 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 8 for a summer crop, and set out a second round of transplants by Jun 27 for a fall crop.
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