Frost Dates for Piedmont, OK 73078
Last spring frost April 4 · First fall frost October 30 · 209 frost-free days · USDA Zone 7b
ZIP 73078 has about 13,000 people.
Long season: 209 frost-free days. Spring frost risk spans March 22–April 16 (25 days). Fall frost risk spans October 13–November 19 (37 days).
Frost probability for 73078
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | April 16 | April 4 | March 22 |
| Fall (first frost) | October 13 | October 30 | November 19 |
Dates come from NOAA 1971–2000 freeze probabilities at EL RENO 1 N (22.6 km away); the 50% date is the median year.
Which crops fit a 209-day season in Piedmont
In Piedmont (209 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 28 | Apr 18–Apr 25 | 167 | fits: 80 days to maturity, 167 available after Apr 18. | Jun 30 |
| Pepper | Feb 21 | Apr 18–Apr 25 | 167 | fits: 75 days to maturity, 167 available after Apr 18. | Jul 5 |
| Lettuce | Feb 7 | Mar 7–Mar 14 | 244 | two-plantings: Plant Mar 7 and again by Sep 8; both mature before Nov 6. | Sep 8 |
| Carrots | — | Mar 14–Mar 21 | 251 | fits: 70 days to maturity, 251 available after Mar 14. | Aug 28 |
| Cucumber | Mar 14 | Apr 18–Apr 25 | 181 | two-plantings: Plant Apr 18 and again by Aug 3; both mature before Oct 16. | Aug 3 |
| Beans | — | Apr 11–Apr 25 | 195 | two-plantings: Plant Apr 11 and again by Aug 10; both mature before Oct 23. | Aug 10 |
| Peas | — | Feb 7–Apr 18 | 272 | fits: 65 days to maturity, 272 available after Feb 7. | Aug 19 |
| Zucchini | Mar 21 | Apr 18–Apr 25 | 181 | two-plantings: Plant Apr 18 and again by Aug 8; both mature before Oct 16. | Aug 8 |
| Onion | Jan 10 | Mar 7–Mar 21 | 244 | fits: 100 days to maturity, 244 available after Mar 7. | — |
| Spinach | — | Feb 7–Mar 28 | 286 | two-plantings: Plant Feb 7 and again by Sep 27; both mature before Nov 20. | Sep 27 |
| Kale | Jan 24 | Mar 7–Mar 21 | 258 | two-plantings: Plant Mar 7 and again by Sep 12; both mature before Nov 20. | Sep 12 |
| Broccoli | Feb 7 | Mar 7–Mar 21 | 244 | fits: 80 days to maturity, 244 available after Mar 7. | Aug 4 |
| Cabbage | Feb 7 | Mar 7–Mar 21 | 258 | fits: 70 days to maturity, 258 available after Mar 7. | Aug 28 |
| Radish | — | Feb 7–May 2 | 272 | two-plantings: Plant Feb 7 and again by Sep 28; both mature before Nov 6. | Sep 28 |
| Beets | — | Feb 7–May 2 | 272 | two-plantings: Plant Feb 7 and again by Aug 29; both mature before Nov 6. | Aug 29 |
| Potatoes | — | Mar 21–Mar 28 | 230 | fits: 90 days to maturity, 230 available after Mar 21. | — |
| Garlic | — | Oct 30 | 314 | overwinter: Plant Oct 30 to Nov 20; harvest the following summer. | Nov 20 |
| Strawberry | — | Feb 28–Apr 25 | 265 | perennial: A perennial: plant Feb 28; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 7 | Apr 11–Apr 18 | 181 | fits: 75 days to maturity, 181 available after Apr 11. | Jul 12 |
| Pumpkin | Mar 21 | Apr 18–Apr 18 | 174 | fits: 100 days to maturity, 174 available after Apr 18. | Jun 17 |
| Cauliflower | Feb 21 | Mar 28–Apr 11 | 223 | fits: 75 days to maturity, 223 available after Mar 28. | Aug 9 |
| Swiss Chard | Feb 7 | Mar 21–Mar 21 | 230 | two-plantings: Plant Mar 21 and again by Aug 29; both mature before Nov 6. | Aug 29 |
| Arugula | — | Feb 7–May 2 | 286 | two-plantings: Plant Feb 7 and again by Sep 27; both mature before Nov 20. | Sep 27 |
| Brussel Sprouts | Feb 7 | Mar 7–Mar 21 | 258 | fits: 100 days to maturity, 258 available after Mar 7. | Jul 29 |
| Butternut Squash | Mar 21 | Apr 18–Apr 25 | 174 | fits: 100 days to maturity, 174 available after Apr 18. | Jun 17 |
| Eggplant | Feb 14 | Apr 18–Apr 25 | 167 | fits: 70 days to maturity, 167 available after Apr 18. | Jul 10 |
| Okra | Mar 7 | Apr 11–Apr 18 | 188 | two-plantings: Plant Apr 11 and again by Aug 8; both mature before Oct 16. | Aug 8 |
| Basil | Feb 28 | Apr 25–Apr 25 | 174 | two-plantings: Plant Apr 25 and again by Aug 3; both mature before Oct 16. | Aug 3 |
| Cilantro | — | Mar 7–Mar 28 | 244 | two-plantings: Plant Mar 7 and again by Sep 3; both mature before Nov 6. | Sep 3 |
| Parsley | Jan 24 | Apr 11–Apr 18 | 209 | fits: 70 days to maturity, 209 available after Apr 11. | Aug 14 |
| Celery | Jan 24 | Apr 11–Apr 25 | 209 | fits: 120 days to maturity, 209 available after Apr 11. | Jun 25 |
| Scallions | Jan 24 | Mar 7–Mar 21 | 258 | two-plantings: Plant Mar 7 and again by Sep 7; both mature before Nov 20. | Sep 7 |
| Turnip | — | Mar 7–Mar 21 | 258 | two-plantings: Plant Mar 7 and again by Sep 17; both mature before Nov 20. | Sep 17 |
| Kohlrabi | — | Feb 21–Mar 7 | 272 | two-plantings: Plant Feb 21 and again by Sep 12; both mature before Nov 20. | Sep 12 |
| Bok Choy | Mar 7 | Mar 28–Apr 4 | 223 | two-plantings: Plant Mar 28 and again by Sep 8; both mature before Nov 6. | Sep 8 |
| Collards | Jan 24 | Mar 7–Mar 21 | 258 | two-plantings: Plant Mar 7 and again by Sep 7; both mature before Nov 20. | Sep 7 |
| Cantaloupe | Mar 21 | Apr 18–Apr 25 | 167 | fits: 85 days to maturity, 167 available after Apr 18. | Jun 25 |
| Chives | Jan 10 | Apr 11–Apr 18 | 223 | fits: 90 days to maturity, 223 available after Apr 11. | — |
| Dill | — | Feb 7–May 2 | 272 | two-plantings: Plant Feb 7 and again by Aug 29; both mature before Nov 6. | Aug 29 |
| Oregano | Jan 24 | Apr 11–Apr 18 | 223 | fits: 80 days to maturity, 223 available after Apr 11. | — |
| Rosemary | Jan 10 | Apr 11–Apr 18 | 209 | fits: 80 days to maturity, 209 available after Apr 11. | — |
| Sage | Feb 7 | Apr 11–Apr 18 | 223 | fits: 75 days to maturity, 223 available after Apr 11. | — |
| Thyme | Jan 24 | Apr 11–Apr 18 | 223 | fits: 90 days to maturity, 223 available after Apr 11. | — |
| Calendula | Feb 21 | Mar 21–Apr 4 | 230 | two-plantings: Plant Mar 21 and again by Sep 3; both mature before Nov 6. | Sep 3 |
| Cosmos | Mar 7 | Apr 4–Apr 18 | 195 | two-plantings: Plant Apr 4 and again by Aug 3; both mature before Oct 16. | Aug 3 |
| Lavender | Jan 10 | Apr 4–Apr 18 | 230 | fits: 90 days to maturity, 230 available after Apr 4. | — |
| Marigolds | Feb 21 | Apr 4–Apr 11 | 195 | two-plantings: Plant Apr 4 and again by Aug 13; both mature before Oct 16. | Aug 13 |
| Melons | Mar 21 | Apr 18–Apr 25 | 167 | fits: 85 days to maturity, 167 available after Apr 18. | Jun 25 |
| Mint | — | Apr 4–Apr 18 | 230 | fits: 90 days to maturity, 230 available after Apr 4. | — |
| Nasturtiums | Mar 7 | Apr 4–Apr 11 | 195 | two-plantings: Plant Apr 4 and again by Aug 8; both mature before Oct 16. | Aug 8 |
| Pole Beans | — | Apr 11–Apr 25 | 188 | fits: 65 days to maturity, 188 available after Apr 11. | Jul 29 |
| Spaghetti Squash | Mar 21 | Apr 18–Apr 25 | 174 | fits: 90 days to maturity, 174 available after Apr 18. | Jun 27 |
| Sunflowers | — | Apr 4–Apr 18 | 195 | fits: 70 days to maturity, 195 available after Apr 4. | Jul 24 |
| Tomatillos | Feb 7 | Apr 11–Apr 18 | 174 | fits: 75 days to maturity, 174 available after Apr 11. | Jul 5 |
| Watermelon | Mar 21 | Apr 11–Apr 18 | 174 | fits: 80 days to maturity, 174 available after Apr 11. | Jun 30 |
| Yellow Squash | Mar 21 | Apr 18–Apr 25 | 181 | two-plantings: Plant Apr 18 and again by Aug 8; both mature before Oct 16. | Aug 8 |
| Zinnias | Mar 7 | Apr 4–Apr 18 | 195 | two-plantings: Plant Apr 4 and again by Aug 3; both mature before Oct 16. | Aug 3 |
Month by month in Piedmont
| Month | What to do |
|---|---|
| January | Start indoors: Chives (Jan 10), Lavender (Jan 10), Onion (Jan 10), Rosemary (Jan 10), Celery (Jan 24), Collards (Jan 24), +5 more. |
| February | Start indoors: Broccoli (Feb 7), Brussel Sprouts (Feb 7), Cabbage (Feb 7), Lettuce (Feb 7), Sage (Feb 7), Swiss Chard (Feb 7), +8 more. Direct sow from: Arugula (Feb 7), Beets (Feb 7), Dill (Feb 7), Peas (Feb 7), Radish (Feb 7), Spinach (Feb 7), +1 more. Plant: Strawberry (Feb 28). |
| March | Start indoors: Bok Choy (Mar 7), Corn (Mar 7), Cosmos (Mar 7), Nasturtiums (Mar 7), Okra (Mar 7), Zinnias (Mar 7), +9 more. Direct sow from: Cilantro (Mar 7), Turnip (Mar 7), Carrots (Mar 14), Potatoes (Mar 21). Transplant from: Broccoli (Mar 7), Brussel Sprouts (Mar 7), Cabbage (Mar 7), Collards (Mar 7), Kale (Mar 7), Lettuce (Mar 7), +6 more. |
| April | Direct sow from: Sunflowers (Apr 4), Beans (Apr 11), Pole Beans (Apr 11). Transplant from: Cosmos (Apr 4), Lavender (Apr 4), Marigolds (Apr 4), Mint (Apr 4), Nasturtiums (Apr 4), Zinnias (Apr 4), +23 more. Last frost around April 4. |
| May | Frost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini. |
| June | Last sowing dates: Butternut Squash (Jun 17), Pumpkin (Jun 17), Cantaloupe (Jun 25), Celery (Jun 25), Melons (Jun 25), Spaghetti Squash (Jun 27), +2 more. |
| July | Last sowing dates: Pepper (Jul 5), Tomatillos (Jul 5), Eggplant (Jul 10), Corn (Jul 12), Sunflowers (Jul 24), Brussel Sprouts (Jul 29), +1 more. |
| August | Last sowing dates: Basil (Aug 3), Cosmos (Aug 3), Cucumber (Aug 3), Zinnias (Aug 3), Broccoli (Aug 4), Nasturtiums (Aug 8), +13 more. |
| September | Last sowing dates: Calendula (Sep 3), Cilantro (Sep 3), Collards (Sep 7), Scallions (Sep 7), Bok Choy (Sep 8), Lettuce (Sep 8), +6 more. |
| October | Direct sow from: Garlic (Oct 30). First frost around October 30. |
| November | Last sowing dates: Garlic (Nov 20). |
| 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 Piedmont, OK (ZIP 73078)?
The median last spring frost date for Piedmont, OK (ZIP code 73078) is around April 4. 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 22; one in ten it runs past April 16.
What is the first fall frost date in Piedmont, OK?
The median first fall frost date for Piedmont, OK is around October 30. 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 13 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Piedmont, OK?
The frost-free growing season in Piedmont is about 209 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 Piedmont (209 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 Piedmont, OK?
Piedmont, OK is in USDA hardiness zone 7b (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 Piedmont, OK?
Start tomatoes indoors Feb 28 and plant out Apr 18 in Piedmont. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Piedmont?
Two: plant Mar 7 and again by Sep 8; both mature before Nov 6.
When do I plant garlic in Piedmont?
Oct 30 to Nov 20; it overwinters and is ready the following summer.
Can I get two tomato crops in Piedmont?
Yes: plant out Apr 18 for a summer crop, and set out a second round of transplants by Jun 30 for a fall crop.
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