Frost Dates for Princeton, IN 47670
Last spring frost April 10 · First fall frost October 25 · 198 frost-free days · USDA Zone 6b
ZIP 47670 has about 11,800 people.
Long season: 198 frost-free days. Spring frost risk spans March 30–April 22 (23 days). Fall frost risk spans October 10–November 9 (30 days).
Frost probability for 47670
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | April 22 | April 10 | March 30 |
| Fall (first frost) | October 10 | October 25 | November 9 |
Dates come from NOAA 1971–2000 freeze probabilities at EVANSVILLE RGNL AP (33.1 km away); the 50% date is the median year.
Which crops fit a 198-day season in Princeton
In Princeton (198 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 6 | Apr 24–May 1 | 156 | fits: 80 days to maturity, 156 available after Apr 24. | Jun 25 |
| Pepper | Feb 27 | Apr 24–May 1 | 156 | fits: 75 days to maturity, 156 available after Apr 24. | Jun 30 |
| Lettuce | Feb 13 | Mar 13–Mar 20 | 233 | two-plantings: Plant Mar 13 and again by Sep 3; both mature before Nov 1. | Sep 3 |
| Carrots | — | Mar 20–Mar 27 | 240 | fits: 70 days to maturity, 240 available after Mar 20. | Aug 23 |
| Cucumber | Mar 20 | Apr 24–May 1 | 170 | two-plantings: Plant Apr 24 and again by Jul 29; both mature before Oct 11. | Jul 29 |
| Beans | — | Apr 17–May 1 | 184 | two-plantings: Plant Apr 17 and again by Aug 5; both mature before Oct 18. | Aug 5 |
| Peas | — | Feb 13–Apr 24 | 261 | fits: 65 days to maturity, 261 available after Feb 13. | Aug 14 |
| Zucchini | Mar 27 | Apr 24–May 1 | 170 | two-plantings: Plant Apr 24 and again by Aug 3; both mature before Oct 11. | Aug 3 |
| Onion | Jan 16 | Mar 13–Mar 27 | 233 | fits: 100 days to maturity, 233 available after Mar 13. | — |
| Spinach | — | Feb 13–Apr 3 | 275 | two-plantings: Plant Feb 13 and again by Sep 22; both mature before Nov 15. | Sep 22 |
| Kale | Jan 30 | Mar 13–Mar 27 | 247 | two-plantings: Plant Mar 13 and again by Sep 7; both mature before Nov 15. | Sep 7 |
| Broccoli | Feb 13 | Mar 13–Mar 27 | 233 | fits: 80 days to maturity, 233 available after Mar 13. | Jul 30 |
| Cabbage | Feb 13 | Mar 13–Mar 27 | 247 | fits: 70 days to maturity, 247 available after Mar 13. | Aug 23 |
| Radish | — | Feb 13–May 8 | 261 | two-plantings: Plant Feb 13 and again by Sep 23; both mature before Nov 1. | Sep 23 |
| Beets | — | Feb 13–May 8 | 261 | two-plantings: Plant Feb 13 and again by Aug 24; both mature before Nov 1. | Aug 24 |
| Potatoes | — | Mar 27–Apr 3 | 219 | fits: 90 days to maturity, 219 available after Mar 27. | — |
| Garlic | — | Oct 25 | 303 | overwinter: Plant Oct 25 to Nov 15; harvest the following summer. | Nov 15 |
| Strawberry | — | Mar 6–May 1 | 254 | perennial: A perennial: plant Mar 6; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 13 | Apr 17–Apr 24 | 170 | fits: 75 days to maturity, 170 available after Apr 17. | Jul 7 |
| Pumpkin | Mar 27 | Apr 24–Apr 24 | 163 | fits: 100 days to maturity, 163 available after Apr 24. | Jun 12 |
| Cauliflower | Feb 27 | Apr 3–Apr 17 | 212 | fits: 75 days to maturity, 212 available after Apr 3. | Aug 4 |
| Swiss Chard | Feb 13 | Mar 27–Mar 27 | 219 | two-plantings: Plant Mar 27 and again by Aug 24; both mature before Nov 1. | Aug 24 |
| Arugula | — | Feb 13–May 8 | 275 | two-plantings: Plant Feb 13 and again by Sep 22; both mature before Nov 15. | Sep 22 |
| Brussel Sprouts | Feb 13 | Mar 13–Mar 27 | 247 | fits: 100 days to maturity, 247 available after Mar 13. | Jul 24 |
| Butternut Squash | Mar 27 | Apr 24–May 1 | 163 | fits: 100 days to maturity, 163 available after Apr 24. | Jun 12 |
| Eggplant | Feb 20 | Apr 24–May 1 | 156 | fits: 70 days to maturity, 156 available after Apr 24. | Jul 5 |
| Okra | Mar 13 | Apr 17–Apr 24 | 177 | two-plantings: Plant Apr 17 and again by Aug 3; both mature before Oct 11. | Aug 3 |
| Basil | Mar 6 | May 1–May 1 | 163 | two-plantings: Plant May 1 and again by Jul 29; both mature before Oct 11. | Jul 29 |
| Cilantro | — | Mar 13–Apr 3 | 233 | two-plantings: Plant Mar 13 and again by Aug 29; both mature before Nov 1. | Aug 29 |
| Parsley | Jan 30 | Apr 17–Apr 24 | 198 | fits: 70 days to maturity, 198 available after Apr 17. | Aug 9 |
| Celery | Jan 30 | Apr 17–May 1 | 198 | fits: 120 days to maturity, 198 available after Apr 17. | Jun 20 |
| Scallions | Jan 30 | Mar 13–Mar 27 | 247 | two-plantings: Plant Mar 13 and again by Sep 2; both mature before Nov 15. | Sep 2 |
| Turnip | — | Mar 13–Mar 27 | 247 | two-plantings: Plant Mar 13 and again by Sep 12; both mature before Nov 15. | Sep 12 |
| Kohlrabi | — | Feb 27–Mar 13 | 261 | two-plantings: Plant Feb 27 and again by Sep 7; both mature before Nov 15. | Sep 7 |
| Bok Choy | Mar 13 | Apr 3–Apr 10 | 212 | two-plantings: Plant Apr 3 and again by Sep 3; both mature before Nov 1. | Sep 3 |
| Collards | Jan 30 | Mar 13–Mar 27 | 247 | two-plantings: Plant Mar 13 and again by Sep 2; both mature before Nov 15. | Sep 2 |
| Cantaloupe | Mar 27 | Apr 24–May 1 | 156 | fits: 85 days to maturity, 156 available after Apr 24. | Jun 20 |
| Chives | Jan 16 | Apr 17–Apr 24 | 212 | fits: 90 days to maturity, 212 available after Apr 17. | — |
| Dill | — | Feb 13–May 8 | 261 | two-plantings: Plant Feb 13 and again by Aug 24; both mature before Nov 1. | Aug 24 |
| Oregano | Jan 30 | Apr 17–Apr 24 | 212 | fits: 80 days to maturity, 212 available after Apr 17. | — |
| Rosemary | Jan 16 | Apr 17–Apr 24 | 198 | fits: 80 days to maturity, 198 available after Apr 17. | — |
| Sage | Feb 13 | Apr 17–Apr 24 | 212 | fits: 75 days to maturity, 212 available after Apr 17. | — |
| Thyme | Jan 30 | Apr 17–Apr 24 | 212 | fits: 90 days to maturity, 212 available after Apr 17. | — |
| Calendula | Feb 27 | Mar 27–Apr 10 | 219 | two-plantings: Plant Mar 27 and again by Aug 29; both mature before Nov 1. | Aug 29 |
| Cosmos | Mar 13 | Apr 10–Apr 24 | 184 | two-plantings: Plant Apr 10 and again by Jul 29; both mature before Oct 11. | Jul 29 |
| Lavender | Jan 16 | Apr 10–Apr 24 | 219 | fits: 90 days to maturity, 219 available after Apr 10. | — |
| Marigolds | Feb 27 | Apr 10–Apr 17 | 184 | two-plantings: Plant Apr 10 and again by Aug 8; both mature before Oct 11. | Aug 8 |
| Melons | Mar 27 | Apr 24–May 1 | 156 | fits: 85 days to maturity, 156 available after Apr 24. | Jun 20 |
| Mint | — | Apr 10–Apr 24 | 219 | fits: 90 days to maturity, 219 available after Apr 10. | — |
| Nasturtiums | Mar 13 | Apr 10–Apr 17 | 184 | two-plantings: Plant Apr 10 and again by Aug 3; both mature before Oct 11. | Aug 3 |
| Pole Beans | — | Apr 17–May 1 | 177 | fits: 65 days to maturity, 177 available after Apr 17. | Jul 24 |
| Spaghetti Squash | Mar 27 | Apr 24–May 1 | 163 | fits: 90 days to maturity, 163 available after Apr 24. | Jun 22 |
| Sunflowers | — | Apr 10–Apr 24 | 184 | fits: 70 days to maturity, 184 available after Apr 10. | Jul 19 |
| Tomatillos | Feb 13 | Apr 17–Apr 24 | 163 | fits: 75 days to maturity, 163 available after Apr 17. | Jun 30 |
| Watermelon | Mar 27 | Apr 17–Apr 24 | 163 | fits: 80 days to maturity, 163 available after Apr 17. | Jun 25 |
| Yellow Squash | Mar 27 | Apr 24–May 1 | 170 | two-plantings: Plant Apr 24 and again by Aug 3; both mature before Oct 11. | Aug 3 |
| Zinnias | Mar 13 | Apr 10–Apr 24 | 184 | two-plantings: Plant Apr 10 and again by Jul 29; both mature before Oct 11. | Jul 29 |
Month by month in Princeton
| Month | What to do |
|---|---|
| January | Start indoors: Chives (Jan 16), Lavender (Jan 16), Onion (Jan 16), Rosemary (Jan 16), Celery (Jan 30), Collards (Jan 30), +5 more. |
| February | Start indoors: Broccoli (Feb 13), Brussel Sprouts (Feb 13), Cabbage (Feb 13), Lettuce (Feb 13), Sage (Feb 13), Swiss Chard (Feb 13), +6 more. Direct sow from: Arugula (Feb 13), Beets (Feb 13), Dill (Feb 13), Peas (Feb 13), Radish (Feb 13), Spinach (Feb 13), +1 more. |
| March | Start indoors: Basil (Mar 6), Tomato (Mar 6), Bok Choy (Mar 13), Corn (Mar 13), Cosmos (Mar 13), Nasturtiums (Mar 13), +11 more. Direct sow from: Cilantro (Mar 13), Turnip (Mar 13), Carrots (Mar 20), Potatoes (Mar 27). Transplant from: Broccoli (Mar 13), Brussel Sprouts (Mar 13), Cabbage (Mar 13), Collards (Mar 13), Kale (Mar 13), Lettuce (Mar 13), +4 more. Plant: Strawberry (Mar 6). |
| April | Direct sow from: Sunflowers (Apr 10), Beans (Apr 17), Pole Beans (Apr 17). Transplant from: Bok Choy (Apr 3), Cauliflower (Apr 3), Cosmos (Apr 10), Lavender (Apr 10), Marigolds (Apr 10), Mint (Apr 10), +24 more. Last frost around April 10. |
| May | Transplant from: Basil (May 1). |
| June | Last sowing dates: Butternut Squash (Jun 12), Pumpkin (Jun 12), Cantaloupe (Jun 20), Celery (Jun 20), Melons (Jun 20), Spaghetti Squash (Jun 22), +4 more. |
| July | Last sowing dates: Eggplant (Jul 5), Corn (Jul 7), Sunflowers (Jul 19), Brussel Sprouts (Jul 24), Pole Beans (Jul 24), Basil (Jul 29), +4 more. |
| August | Last sowing dates: Nasturtiums (Aug 3), Okra (Aug 3), Yellow Squash (Aug 3), Zucchini (Aug 3), Cauliflower (Aug 4), Beans (Aug 5), +10 more. |
| September | Last sowing dates: Collards (Sep 2), Scallions (Sep 2), Bok Choy (Sep 3), Lettuce (Sep 3), Kale (Sep 7), Kohlrabi (Sep 7), +4 more. |
| October | Direct sow from: Garlic (Oct 25). First frost around October 25. |
| November | Last sowing dates: Garlic (Nov 15). |
| 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 Princeton, IN (ZIP 47670)?
The median last spring frost date for Princeton, IN (ZIP code 47670) is around April 10. 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 30; one in ten it runs past April 22.
What is the first fall frost date in Princeton, IN?
The median first fall frost date for Princeton, IN is around October 25. 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 10 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Princeton, IN?
The frost-free growing season in Princeton is about 198 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 Princeton (198 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 Princeton, IN?
Princeton, IN is in USDA hardiness zone 6b (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 Princeton, IN?
Start tomatoes indoors Mar 6 and plant out Apr 24 in Princeton. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Princeton?
Two: plant Mar 13 and again by Sep 3; both mature before Nov 1.
When do I plant garlic in Princeton?
Oct 25 to Nov 15; it overwinters and is ready the following summer.
Can I get two tomato crops in Princeton?
Yes: plant out Apr 24 for a summer crop, and set out a second round of transplants by Jun 25 for a fall crop.
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