Frost Dates for Oregon City, OR 97045
Last spring frost April 3 · First fall frost November 13 · 224 frost-free days · USDA Zone 9a
ZIP 97045 has about 57,500 people.
Long season: 224 frost-free days. Spring frost risk spans March 6–May 2 (57 days). Fall frost risk spans October 20–December 6 (47 days).
Frost probability for 97045
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 2 | April 3 | March 6 |
| Fall (first frost) | October 20 | November 13 | December 6 |
Dates come from NOAA 1971–2000 freeze probabilities at ESTACADA 2 SE (18.0 km away); the 50% date is the median year.
Which crops fit a 224-day season in Oregon City
In Oregon City (224 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 | Feb 27 | Apr 17–Apr 24 | 182 | fits: 80 days to maturity, 182 available after Apr 17. | Jul 14 |
| Pepper | Feb 20 | Apr 17–Apr 24 | 182 | fits: 75 days to maturity, 182 available after Apr 17. | Jul 19 |
| Lettuce | Feb 6 | Mar 6–Mar 13 | 259 | two-plantings: Plant Mar 6 and again by Sep 22; both mature before Nov 20. | Sep 22 |
| Carrots | — | Mar 13–Mar 20 | 266 | fits: 70 days to maturity, 266 available after Mar 13. | Sep 11 |
| Cucumber | Mar 13 | Apr 17–Apr 24 | 196 | two-plantings: Plant Apr 17 and again by Aug 17; both mature before Oct 30. | Aug 17 |
| Beans | — | Apr 10–Apr 24 | 210 | two-plantings: Plant Apr 10 and again by Aug 24; both mature before Nov 6. | Aug 24 |
| Peas | — | Feb 6–Apr 17 | 287 | fits: 65 days to maturity, 287 available after Feb 6. | Sep 2 |
| Zucchini | Mar 20 | Apr 17–Apr 24 | 196 | two-plantings: Plant Apr 17 and again by Aug 22; both mature before Oct 30. | Aug 22 |
| Onion | Jan 9 | Mar 6–Mar 20 | 259 | fits: 100 days to maturity, 259 available after Mar 6. | — |
| Spinach | — | Feb 6–Mar 27 | 301 | two-plantings: Plant Feb 6 and again by Oct 11; both mature before Dec 4. | Oct 11 |
| Kale | Jan 23 | Mar 6–Mar 20 | 273 | two-plantings: Plant Mar 6 and again by Sep 26; both mature before Dec 4. | Sep 26 |
| Broccoli | Feb 6 | Mar 6–Mar 20 | 259 | fits: 80 days to maturity, 259 available after Mar 6. | Aug 18 |
| Cabbage | Feb 6 | Mar 6–Mar 20 | 273 | fits: 70 days to maturity, 273 available after Mar 6. | Sep 11 |
| Radish | — | Feb 6–May 1 | 287 | two-plantings: Plant Feb 6 and again by Oct 12; both mature before Nov 20. | Oct 12 |
| Beets | — | Feb 6–May 1 | 287 | two-plantings: Plant Feb 6 and again by Sep 12; both mature before Nov 20. | Sep 12 |
| Potatoes | — | Mar 20–Mar 27 | 245 | fits: 90 days to maturity, 245 available after Mar 20. | — |
| Garlic | — | Nov 13 | 329 | overwinter: Plant Nov 13 to Dec 4; harvest the following summer. | Dec 4 |
| Strawberry | — | Feb 27–Apr 24 | 280 | perennial: A perennial: plant Feb 27; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 6 | Apr 10–Apr 17 | 196 | fits: 75 days to maturity, 196 available after Apr 10. | Jul 26 |
| Pumpkin | Mar 20 | Apr 17–Apr 17 | 189 | fits: 100 days to maturity, 189 available after Apr 17. | Jul 1 |
| Cauliflower | Feb 20 | Mar 27–Apr 10 | 238 | fits: 75 days to maturity, 238 available after Mar 27. | Aug 23 |
| Swiss Chard | Feb 6 | Mar 20–Mar 20 | 245 | two-plantings: Plant Mar 20 and again by Sep 12; both mature before Nov 20. | Sep 12 |
| Arugula | — | Feb 6–May 1 | 301 | two-plantings: Plant Feb 6 and again by Oct 11; both mature before Dec 4. | Oct 11 |
| Brussel Sprouts | Feb 6 | Mar 6–Mar 20 | 273 | fits: 100 days to maturity, 273 available after Mar 6. | Aug 12 |
| Butternut Squash | Mar 20 | Apr 17–Apr 24 | 189 | fits: 100 days to maturity, 189 available after Apr 17. | Jul 1 |
| Eggplant | Feb 13 | Apr 17–Apr 24 | 182 | fits: 70 days to maturity, 182 available after Apr 17. | Jul 24 |
| Okra | Mar 6 | Apr 10–Apr 17 | 203 | two-plantings: Plant Apr 10 and again by Aug 22; both mature before Oct 30. | Aug 22 |
| Basil | Feb 27 | Apr 24–Apr 24 | 189 | two-plantings: Plant Apr 24 and again by Aug 17; both mature before Oct 30. | Aug 17 |
| Cilantro | — | Mar 6–Mar 27 | 259 | two-plantings: Plant Mar 6 and again by Sep 17; both mature before Nov 20. | Sep 17 |
| Parsley | Jan 23 | Apr 10–Apr 17 | 224 | fits: 70 days to maturity, 224 available after Apr 10. | Aug 28 |
| Celery | Jan 23 | Apr 10–Apr 24 | 224 | fits: 120 days to maturity, 224 available after Apr 10. | Jul 9 |
| Scallions | Jan 23 | Mar 6–Mar 20 | 273 | two-plantings: Plant Mar 6 and again by Sep 21; both mature before Dec 4. | Sep 21 |
| Turnip | — | Mar 6–Mar 20 | 273 | two-plantings: Plant Mar 6 and again by Oct 1; both mature before Dec 4. | Oct 1 |
| Kohlrabi | — | Feb 20–Mar 6 | 287 | two-plantings: Plant Feb 20 and again by Sep 26; both mature before Dec 4. | Sep 26 |
| Bok Choy | Mar 6 | Mar 27–Apr 3 | 238 | two-plantings: Plant Mar 27 and again by Sep 22; both mature before Nov 20. | Sep 22 |
| Collards | Jan 23 | Mar 6–Mar 20 | 273 | two-plantings: Plant Mar 6 and again by Sep 21; both mature before Dec 4. | Sep 21 |
| Cantaloupe | Mar 20 | Apr 17–Apr 24 | 182 | fits: 85 days to maturity, 182 available after Apr 17. | Jul 9 |
| Chives | Jan 9 | Apr 10–Apr 17 | 238 | fits: 90 days to maturity, 238 available after Apr 10. | — |
| Dill | — | Feb 6–May 1 | 287 | two-plantings: Plant Feb 6 and again by Sep 12; both mature before Nov 20. | Sep 12 |
| Oregano | Jan 23 | Apr 10–Apr 17 | 238 | fits: 80 days to maturity, 238 available after Apr 10. | — |
| Rosemary | Jan 9 | Apr 10–Apr 17 | 224 | fits: 80 days to maturity, 224 available after Apr 10. | — |
| Sage | Feb 6 | Apr 10–Apr 17 | 238 | fits: 75 days to maturity, 238 available after Apr 10. | — |
| Thyme | Jan 23 | Apr 10–Apr 17 | 238 | fits: 90 days to maturity, 238 available after Apr 10. | — |
| Calendula | Feb 20 | Mar 20–Apr 3 | 245 | two-plantings: Plant Mar 20 and again by Sep 17; both mature before Nov 20. | Sep 17 |
| Cosmos | Mar 6 | Apr 3–Apr 17 | 210 | two-plantings: Plant Apr 3 and again by Aug 17; both mature before Oct 30. | Aug 17 |
| Lavender | Jan 9 | Apr 3–Apr 17 | 245 | fits: 90 days to maturity, 245 available after Apr 3. | — |
| Marigolds | Feb 20 | Apr 3–Apr 10 | 210 | two-plantings: Plant Apr 3 and again by Aug 27; both mature before Oct 30. | Aug 27 |
| Melons | Mar 20 | Apr 17–Apr 24 | 182 | fits: 85 days to maturity, 182 available after Apr 17. | Jul 9 |
| Mint | — | Apr 3–Apr 17 | 245 | fits: 90 days to maturity, 245 available after Apr 3. | — |
| Nasturtiums | Mar 6 | Apr 3–Apr 10 | 210 | two-plantings: Plant Apr 3 and again by Aug 22; both mature before Oct 30. | Aug 22 |
| Pole Beans | — | Apr 10–Apr 24 | 203 | fits: 65 days to maturity, 203 available after Apr 10. | Aug 12 |
| Spaghetti Squash | Mar 20 | Apr 17–Apr 24 | 189 | fits: 90 days to maturity, 189 available after Apr 17. | Jul 11 |
| Sunflowers | — | Apr 3–Apr 17 | 210 | fits: 70 days to maturity, 210 available after Apr 3. | Aug 7 |
| Tomatillos | Feb 6 | Apr 10–Apr 17 | 189 | fits: 75 days to maturity, 189 available after Apr 10. | Jul 19 |
| Watermelon | Mar 20 | Apr 10–Apr 17 | 189 | fits: 80 days to maturity, 189 available after Apr 10. | Jul 14 |
| Yellow Squash | Mar 20 | Apr 17–Apr 24 | 196 | two-plantings: Plant Apr 17 and again by Aug 22; both mature before Oct 30. | Aug 22 |
| Zinnias | Mar 6 | Apr 3–Apr 17 | 210 | two-plantings: Plant Apr 3 and again by Aug 17; both mature before Oct 30. | Aug 17 |
Month by month in Oregon City
| Month | What to do |
|---|---|
| January | Start indoors: Chives (Jan 9), Lavender (Jan 9), Onion (Jan 9), Rosemary (Jan 9), Celery (Jan 23), Collards (Jan 23), +5 more. |
| February | Start indoors: Broccoli (Feb 6), Brussel Sprouts (Feb 6), Cabbage (Feb 6), Lettuce (Feb 6), Sage (Feb 6), Swiss Chard (Feb 6), +8 more. Direct sow from: Arugula (Feb 6), Beets (Feb 6), Dill (Feb 6), Peas (Feb 6), Radish (Feb 6), Spinach (Feb 6), +1 more. Plant: Strawberry (Feb 27). |
| March | Start indoors: Bok Choy (Mar 6), Corn (Mar 6), Cosmos (Mar 6), Nasturtiums (Mar 6), Okra (Mar 6), Zinnias (Mar 6), +9 more. Direct sow from: Cilantro (Mar 6), Turnip (Mar 6), Carrots (Mar 13), Potatoes (Mar 20). Transplant from: Broccoli (Mar 6), Brussel Sprouts (Mar 6), Cabbage (Mar 6), Collards (Mar 6), Kale (Mar 6), Lettuce (Mar 6), +6 more. |
| April | Direct sow from: Sunflowers (Apr 3), Beans (Apr 10), Pole Beans (Apr 10). Transplant from: Cosmos (Apr 3), Lavender (Apr 3), Marigolds (Apr 3), Mint (Apr 3), Nasturtiums (Apr 3), Zinnias (Apr 3), +23 more. Last frost around April 3. |
| May | Frost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini. |
| June | Succession plant lettuce and greens. Keep beds weeded and watered consistently. |
| July | Last sowing dates: Butternut Squash (Jul 1), Pumpkin (Jul 1), Cantaloupe (Jul 9), Celery (Jul 9), Melons (Jul 9), Spaghetti Squash (Jul 11), +6 more. |
| August | Last sowing dates: Sunflowers (Aug 7), Brussel Sprouts (Aug 12), Pole Beans (Aug 12), Basil (Aug 17), Cosmos (Aug 17), Cucumber (Aug 17), +10 more. |
| September | Last sowing dates: Peas (Sep 2), Cabbage (Sep 11), Carrots (Sep 11), Beets (Sep 12), Dill (Sep 12), Swiss Chard (Sep 12), +8 more. |
| October | Last sowing dates: Turnip (Oct 1), Arugula (Oct 11), Spinach (Oct 11), Radish (Oct 12). |
| November | Direct sow from: Garlic (Nov 13). First frost around November 13. |
| December | Last sowing dates: Garlic (Dec 4). |
Frequently Asked Questions
What is the last frost date for Oregon City, OR (ZIP 97045)?
The median last spring frost date for Oregon City, OR (ZIP code 97045) is around April 3. 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 6; one in ten it runs past May 2.
What is the first fall frost date in Oregon City, OR?
The median first fall frost date for Oregon City, OR is around November 13. 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 20 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Oregon City, OR?
The frost-free growing season in Oregon City is about 224 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 Oregon City (224 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 Oregon City, OR?
Oregon City, OR is in USDA hardiness zone 9a (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 Oregon City, OR?
Start tomatoes indoors Feb 27 and plant out Apr 17 in Oregon City. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Oregon City?
Two: plant Mar 6 and again by Sep 22; both mature before Nov 20.
When do I plant garlic in Oregon City?
Nov 13 to Dec 4; it overwinters and is ready the following summer.
Can I get two tomato crops in Oregon City?
Yes: plant out Apr 17 for a summer crop, and set out a second round of transplants by Jul 14 for a fall crop.
Which nearby ZIP has a longer season?
Gladstone (ZIP 97027) has 237 frost-free days, 13 more than Oregon City (ZIP 97045). See Gladstone ZIP 97027 frost dates
Nearby and related
- Frost dates for Gladstone, OR 97027 (5 mi)
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- When to plant in OR
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