Frost Dates for Springfield, OR 97478
Last spring frost April 13 · First fall frost November 7 · 208 frost-free days · USDA Zone 8b
ZIP 97478 has about 39,400 people, the largest of 2 ZIP codes in Springfield.
Long season: 208 frost-free days. Spring frost risk spans March 25–May 2 (38 days). Fall frost risk spans October 15–November 30 (46 days).
Frost probability for 97478
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 2 | April 13 | March 25 |
| Fall (first frost) | October 15 | November 7 | November 30 |
Dates come from NOAA 1971–2000 freeze probabilities at LEABURG 1 SW (12.6 km away); the 50% date is the median year.
Frost dates by ZIP code in Springfield, OR
| ZIP | Last spring frost (50%) | First fall frost (50%) | Zone |
|---|---|---|---|
| 97478 | April 13 | November 7 | 8b |
| 97477 | April 22 | October 19 | 8b |
Which crops fit a 208-day season in Springfield
In Springfield (208 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 9 | Apr 27–May 4 | 166 | fits: 80 days to maturity, 166 available after Apr 27. | Jul 8 |
| Pepper | Mar 2 | Apr 27–May 4 | 166 | fits: 75 days to maturity, 166 available after Apr 27. | Jul 13 |
| Lettuce | Feb 16 | Mar 16–Mar 23 | 243 | two-plantings: Plant Mar 16 and again by Sep 16; both mature before Nov 14. | Sep 16 |
| Carrots | — | Mar 23–Mar 30 | 250 | fits: 70 days to maturity, 250 available after Mar 23. | Sep 5 |
| Cucumber | Mar 23 | Apr 27–May 4 | 180 | two-plantings: Plant Apr 27 and again by Aug 11; both mature before Oct 24. | Aug 11 |
| Beans | — | Apr 20–May 4 | 194 | two-plantings: Plant Apr 20 and again by Aug 18; both mature before Oct 31. | Aug 18 |
| Peas | — | Feb 16–Apr 27 | 271 | fits: 65 days to maturity, 271 available after Feb 16. | Aug 27 |
| Zucchini | Mar 30 | Apr 27–May 4 | 180 | two-plantings: Plant Apr 27 and again by Aug 16; both mature before Oct 24. | Aug 16 |
| Onion | Jan 19 | Mar 16–Mar 30 | 243 | fits: 100 days to maturity, 243 available after Mar 16. | — |
| Spinach | — | Feb 16–Apr 6 | 285 | two-plantings: Plant Feb 16 and again by Oct 5; both mature before Nov 28. | Oct 5 |
| Kale | Feb 2 | Mar 16–Mar 30 | 257 | two-plantings: Plant Mar 16 and again by Sep 20; both mature before Nov 28. | Sep 20 |
| Broccoli | Feb 16 | Mar 16–Mar 30 | 243 | fits: 80 days to maturity, 243 available after Mar 16. | Aug 12 |
| Cabbage | Feb 16 | Mar 16–Mar 30 | 257 | fits: 70 days to maturity, 257 available after Mar 16. | Sep 5 |
| Radish | — | Feb 16–May 11 | 271 | two-plantings: Plant Feb 16 and again by Oct 6; both mature before Nov 14. | Oct 6 |
| Beets | — | Feb 16–May 11 | 271 | two-plantings: Plant Feb 16 and again by Sep 6; both mature before Nov 14. | Sep 6 |
| Potatoes | — | Mar 30–Apr 6 | 229 | fits: 90 days to maturity, 229 available after Mar 30. | — |
| Garlic | — | Nov 7 | 313 | overwinter: Plant Nov 7 to Nov 28; harvest the following summer. | Nov 28 |
| Strawberry | — | Mar 9–May 4 | 264 | perennial: A perennial: plant Mar 9; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 16 | Apr 20–Apr 27 | 180 | fits: 75 days to maturity, 180 available after Apr 20. | Jul 20 |
| Pumpkin | Mar 30 | Apr 27–Apr 27 | 173 | fits: 100 days to maturity, 173 available after Apr 27. | Jun 25 |
| Cauliflower | Mar 2 | Apr 6–Apr 20 | 222 | fits: 75 days to maturity, 222 available after Apr 6. | Aug 17 |
| Swiss Chard | Feb 16 | Mar 30–Mar 30 | 229 | two-plantings: Plant Mar 30 and again by Sep 6; both mature before Nov 14. | Sep 6 |
| Arugula | — | Feb 16–May 11 | 285 | two-plantings: Plant Feb 16 and again by Oct 5; both mature before Nov 28. | Oct 5 |
| Brussel Sprouts | Feb 16 | Mar 16–Mar 30 | 257 | fits: 100 days to maturity, 257 available after Mar 16. | Aug 6 |
| Butternut Squash | Mar 30 | Apr 27–May 4 | 173 | fits: 100 days to maturity, 173 available after Apr 27. | Jun 25 |
| Eggplant | Feb 23 | Apr 27–May 4 | 166 | fits: 70 days to maturity, 166 available after Apr 27. | Jul 18 |
| Okra | Mar 16 | Apr 20–Apr 27 | 187 | two-plantings: Plant Apr 20 and again by Aug 16; both mature before Oct 24. | Aug 16 |
| Basil | Mar 9 | May 4–May 4 | 173 | two-plantings: Plant May 4 and again by Aug 11; both mature before Oct 24. | Aug 11 |
| Cilantro | — | Mar 16–Apr 6 | 243 | two-plantings: Plant Mar 16 and again by Sep 11; both mature before Nov 14. | Sep 11 |
| Parsley | Feb 2 | Apr 20–Apr 27 | 208 | fits: 70 days to maturity, 208 available after Apr 20. | Aug 22 |
| Celery | Feb 2 | Apr 20–May 4 | 208 | fits: 120 days to maturity, 208 available after Apr 20. | Jul 3 |
| Scallions | Feb 2 | Mar 16–Mar 30 | 257 | two-plantings: Plant Mar 16 and again by Sep 15; both mature before Nov 28. | Sep 15 |
| Turnip | — | Mar 16–Mar 30 | 257 | two-plantings: Plant Mar 16 and again by Sep 25; both mature before Nov 28. | Sep 25 |
| Kohlrabi | — | Mar 2–Mar 16 | 271 | two-plantings: Plant Mar 2 and again by Sep 20; both mature before Nov 28. | Sep 20 |
| Bok Choy | Mar 16 | Apr 6–Apr 13 | 222 | two-plantings: Plant Apr 6 and again by Sep 16; both mature before Nov 14. | Sep 16 |
| Collards | Feb 2 | Mar 16–Mar 30 | 257 | two-plantings: Plant Mar 16 and again by Sep 15; both mature before Nov 28. | Sep 15 |
| Cantaloupe | Mar 30 | Apr 27–May 4 | 166 | fits: 85 days to maturity, 166 available after Apr 27. | Jul 3 |
| Chives | Jan 19 | Apr 20–Apr 27 | 222 | fits: 90 days to maturity, 222 available after Apr 20. | — |
| Dill | — | Feb 16–May 11 | 271 | two-plantings: Plant Feb 16 and again by Sep 6; both mature before Nov 14. | Sep 6 |
| Oregano | Feb 2 | Apr 20–Apr 27 | 222 | fits: 80 days to maturity, 222 available after Apr 20. | — |
| Rosemary | Jan 19 | Apr 20–Apr 27 | 208 | fits: 80 days to maturity, 208 available after Apr 20. | — |
| Sage | Feb 16 | Apr 20–Apr 27 | 222 | fits: 75 days to maturity, 222 available after Apr 20. | — |
| Thyme | Feb 2 | Apr 20–Apr 27 | 222 | fits: 90 days to maturity, 222 available after Apr 20. | — |
| Calendula | Mar 2 | Mar 30–Apr 13 | 229 | two-plantings: Plant Mar 30 and again by Sep 11; both mature before Nov 14. | Sep 11 |
| Cosmos | Mar 16 | Apr 13–Apr 27 | 194 | two-plantings: Plant Apr 13 and again by Aug 11; both mature before Oct 24. | Aug 11 |
| Lavender | Jan 19 | Apr 13–Apr 27 | 229 | fits: 90 days to maturity, 229 available after Apr 13. | — |
| Marigolds | Mar 2 | Apr 13–Apr 20 | 194 | two-plantings: Plant Apr 13 and again by Aug 21; both mature before Oct 24. | Aug 21 |
| Melons | Mar 30 | Apr 27–May 4 | 166 | fits: 85 days to maturity, 166 available after Apr 27. | Jul 3 |
| Mint | — | Apr 13–Apr 27 | 229 | fits: 90 days to maturity, 229 available after Apr 13. | — |
| Nasturtiums | Mar 16 | Apr 13–Apr 20 | 194 | two-plantings: Plant Apr 13 and again by Aug 16; both mature before Oct 24. | Aug 16 |
| Pole Beans | — | Apr 20–May 4 | 187 | fits: 65 days to maturity, 187 available after Apr 20. | Aug 6 |
| Spaghetti Squash | Mar 30 | Apr 27–May 4 | 173 | fits: 90 days to maturity, 173 available after Apr 27. | Jul 5 |
| Sunflowers | — | Apr 13–Apr 27 | 194 | fits: 70 days to maturity, 194 available after Apr 13. | Aug 1 |
| Tomatillos | Feb 16 | Apr 20–Apr 27 | 173 | fits: 75 days to maturity, 173 available after Apr 20. | Jul 13 |
| Watermelon | Mar 30 | Apr 20–Apr 27 | 173 | fits: 80 days to maturity, 173 available after Apr 20. | Jul 8 |
| Yellow Squash | Mar 30 | Apr 27–May 4 | 180 | two-plantings: Plant Apr 27 and again by Aug 16; both mature before Oct 24. | Aug 16 |
| Zinnias | Mar 16 | Apr 13–Apr 27 | 194 | two-plantings: Plant Apr 13 and again by Aug 11; both mature before Oct 24. | Aug 11 |
Month by month in Springfield
| Month | What to do |
|---|---|
| January | Start indoors: Chives (Jan 19), Lavender (Jan 19), Onion (Jan 19), Rosemary (Jan 19). |
| February | Start indoors: Celery (Feb 2), Collards (Feb 2), Kale (Feb 2), Oregano (Feb 2), Parsley (Feb 2), Scallions (Feb 2), +9 more. Direct sow from: Arugula (Feb 16), Beets (Feb 16), Dill (Feb 16), Peas (Feb 16), Radish (Feb 16), Spinach (Feb 16). |
| March | Start indoors: Calendula (Mar 2), Cauliflower (Mar 2), Marigolds (Mar 2), Pepper (Mar 2), Basil (Mar 9), Tomato (Mar 9), +15 more. Direct sow from: Kohlrabi (Mar 2), Cilantro (Mar 16), Turnip (Mar 16), Carrots (Mar 23), Potatoes (Mar 30). Transplant from: Broccoli (Mar 16), Brussel Sprouts (Mar 16), Cabbage (Mar 16), Collards (Mar 16), Kale (Mar 16), Lettuce (Mar 16), +4 more. Plant: Strawberry (Mar 9). |
| April | Direct sow from: Sunflowers (Apr 13), Beans (Apr 20), Pole Beans (Apr 20). Transplant from: Bok Choy (Apr 6), Cauliflower (Apr 6), Cosmos (Apr 13), Lavender (Apr 13), Marigolds (Apr 13), Mint (Apr 13), +24 more. Last frost around April 13. |
| May | Transplant from: Basil (May 4). |
| June | Last sowing dates: Butternut Squash (Jun 25), Pumpkin (Jun 25). |
| July | Last sowing dates: Cantaloupe (Jul 3), Celery (Jul 3), Melons (Jul 3), Spaghetti Squash (Jul 5), Tomato (Jul 8), Watermelon (Jul 8), +4 more. |
| August | Last sowing dates: Sunflowers (Aug 1), Brussel Sprouts (Aug 6), Pole Beans (Aug 6), Basil (Aug 11), Cosmos (Aug 11), Cucumber (Aug 11), +11 more. |
| September | Last sowing dates: Cabbage (Sep 5), Carrots (Sep 5), Beets (Sep 6), Dill (Sep 6), Swiss Chard (Sep 6), Calendula (Sep 11), +8 more. |
| October | Last sowing dates: Arugula (Oct 5), Spinach (Oct 5), Radish (Oct 6). |
| November | Direct sow from: Garlic (Nov 7). First frost around November 7. Last sowing dates: Garlic (Nov 28). |
| 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 Springfield, OR (ZIP 97478)?
The median last spring frost date for Springfield, OR (ZIP code 97478) is around April 13. 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 25; one in ten it runs past May 2.
What is the first fall frost date in Springfield, OR?
The median first fall frost date for Springfield, OR is around November 7. 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 Springfield, OR?
The frost-free growing season in Springfield is about 208 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 Springfield (208 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 Springfield, OR?
Springfield, 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 Springfield, OR?
Start tomatoes indoors Mar 9 and plant out Apr 27 in Springfield. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Springfield?
Two: plant Mar 16 and again by Sep 16; both mature before Nov 14.
When do I plant garlic in Springfield?
Nov 7 to Nov 28; it overwinters and is ready the following summer.
Can I get two tomato crops in Springfield?
Yes: plant out Apr 27 for a summer crop, and set out a second round of transplants by Jul 8 for a fall crop.
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