Oklahoma City, OK Vegetable Planting Calendar

What to plant now in Oklahoma City

No planting windows from our rules fall in October; see the month-by-month list below.

The list above is for the month this page was built; the box is refreshed in your browser for today's date.

Spring planting dates

“Plant out” means transplanting for crops started indoors and sowing or planting directly in the garden for the others. Each column applies CSU Extension's timing rule to a different last-frost anchor: aggressive = typical date (Apr 4, 50% risk), balanced = Apr 10 (30%), safe = Apr 20 (10%). For hardy crops the cell shows the CSU “as early as” window.

Frost odds aren't the only check. CSU recommends measuring soil temperature at 4 inches (6 inches for beans) before you sow. NOAA doesn't publish soil-temperature normals, so we list each crop's minimum soil temperature from CSU instead of a date.

Fall planting dates

Latest dates for a fall harvest, using the University of Nebraska–Lincoln Extension count-back formula: days to harvest (CSU) + 14-day fall factor + 14-day frost-tender factor for frost-sensitive crops, counted back from the first-frost date. For transplanted crops (CSU days are from transplant) the result is the latest transplant date; seeds go in CSU's transplant-age weeks earlier. We add no harvest period, so these dates give you a first harvest by the first frost, not a long harvest.

Month-by-month: what to plant in Oklahoma City

What to plant in Oklahoma City in January

• Start broccoli seeds indoors (Jan 23 – Feb 6)
• Start cabbage seeds indoors (Jan 23 – Feb 6)

What to plant in Oklahoma City in February

• Start cauliflower seeds indoors (Feb 6–20)
• Start eggplant seeds indoors (Feb 20 – Mar 13)
• Start pepper seeds indoors (Feb 27 – Mar 13)
• Start broccoli seeds indoors (Jan 23 – Feb 6)
• Start cabbage seeds indoors (Jan 23 – Feb 6)

What to plant in Oklahoma City in March

• Onions (dry, from sets): plant sets outdoors (Mar 7 – Apr 6)
• Peas: direct sow outdoors (Mar 7 – Apr 6)
• Lettuce (leaf): direct sow outdoors (Mar 7 – Apr 6)
• Broccoli: transplant outdoors (Mar 7 – Apr 6)
• Cabbage: transplant outdoors (Mar 7 – Apr 6)
• Kohlrabi: direct sow outdoors (Mar 7 – Apr 6)
• Green onions: direct sow outdoors (Mar 7 – Apr 6)
• Radishes: direct sow outdoors (Mar 7 – Apr 6)
• Spinach: direct sow outdoors (Mar 7 – Apr 6)
• Turnips: direct sow outdoors (Mar 7 – Apr 6)
• Start tomato seeds indoors (Mar 13–27)
• Potatoes: plant (seed pieces) outdoors (Mar 21 – Apr 20)
• Carrots: direct sow outdoors (Mar 21 – Apr 20)
• Cauliflower: transplant outdoors (Mar 21 – Apr 20)
• Beets: direct sow outdoors (Mar 21 – Apr 20)
• Swiss chard: direct sow outdoors (Mar 21 – Apr 20)
• Parsnips: direct sow outdoors (Mar 21 – Apr 20)
• Start eggplant seeds indoors (Feb 20 – Mar 13)
• Start pepper seeds indoors (Feb 27 – Mar 13)

What to plant in Oklahoma City in April

• Beans (snap): direct sow outdoors (Apr 4–20)
• Summer squash: direct sow outdoors (Apr 4–20)
• Sweet corn: direct sow outdoors (Apr 4–20)
• Cucumbers: direct sow outdoors (Apr 4–20)
• Peppers: transplant outdoors (Apr 18 – May 4)
• Eggplant: transplant outdoors (Apr 18 – May 4)
• Cantaloupe: direct sow outdoors (Apr 18 – May 4)
• Watermelon: direct sow outdoors (Apr 18 – May 4)
• Winter squash: direct sow outdoors (Apr 18 – May 4)
• Onions (dry, from sets): plant sets outdoors (Mar 7 – Apr 6)
• Peas: direct sow outdoors (Mar 7 – Apr 6)
• Lettuce (leaf): direct sow outdoors (Mar 7 – Apr 6)
• Broccoli: transplant outdoors (Mar 7 – Apr 6)
• Cabbage: transplant outdoors (Mar 7 – Apr 6)
• Kohlrabi: direct sow outdoors (Mar 7 – Apr 6)
• Green onions: direct sow outdoors (Mar 7 – Apr 6)
• Radishes: direct sow outdoors (Mar 7 – Apr 6)
• Spinach: direct sow outdoors (Mar 7 – Apr 6)
• Turnips: direct sow outdoors (Mar 7 – Apr 6)
• Potatoes: plant (seed pieces) outdoors (Mar 21 – Apr 20)
• Carrots: direct sow outdoors (Mar 21 – Apr 20)
• Cauliflower: transplant outdoors (Mar 21 – Apr 20)
• Beets: direct sow outdoors (Mar 21 – Apr 20)
• Swiss chard: direct sow outdoors (Mar 21 – Apr 20)
• Parsnips: direct sow outdoors (Mar 21 – Apr 20)

What to plant in Oklahoma City in May

• Tomatoes: transplant outdoors (May 1–4)
• Peppers: transplant outdoors (Apr 18 – May 4)
• Eggplant: transplant outdoors (Apr 18 – May 4)
• Cantaloupe: direct sow outdoors (Apr 18 – May 4)
• Watermelon: direct sow outdoors (Apr 18 – May 4)
• Winter squash: direct sow outdoors (Apr 18 – May 4)

What to plant in Oklahoma City in June

• Start cabbage seeds indoors for a fall crop (Jun 7–21)
• Start broccoli seeds indoors for a fall crop (Jun 27 – Jul 11)

What to plant in Oklahoma City in July

• Last day to set out cabbage transplants for a fall harvest (by Jul 26)
• Start broccoli seeds indoors for a fall crop (Jun 27 – Jul 11)

What to plant in Oklahoma City in August

• Last day to sow beans (snap) for a fall harvest (by Aug 6)
• Last day to sow carrots for a fall harvest (by Aug 10)
• Last day to sow cucumbers for a fall harvest (by Aug 11)
• Last day to sow peas for a fall harvest (by Aug 15)
• Last day to set out broccoli transplants for a fall harvest (by Aug 15)
• Last day to sow summer squash for a fall harvest (by Aug 16)
• Last day to sow lettuce (leaf) for a fall harvest (by Aug 20)
• Last day to sow green onions for a fall harvest (by Aug 20)
• Last day to sow beets for a fall harvest (by Aug 20)
• Last day to sow swiss chard for a fall harvest (by Aug 20)
• Last day to sow kohlrabi for a fall harvest (by Aug 30)
• Last day to sow turnips for a fall harvest (by Aug 30)

What to plant in Oklahoma City in September

• Last day to sow spinach for a fall harvest (by Sep 9)
• Last day to sow radishes for a fall harvest (by Sep 19)

Crop-by-crop notes

When to plant tomatoes in Oklahoma City

Very tender crop. CSU Extension's rules are to set tomatoes out at least 2 weeks after the average last frost and only once nights are above 52°F. In Oklahoma City, the frost rule alone would allow about Apr 18, but the average nightly low at Oklahoma City Will Rogers Airport first rises above 52°F on May 1, so the dates shown start no earlier than that: about May 1 using the typical date, May 1 as a balanced choice, or May 4 if you go by the safer 10% date. Start seeds indoors Mar 13–27, 5–7 weeks before transplanting on May 1. CSU notes that nights under 55°F hurt fruit set. The normal low at Oklahoma City Will Rogers Airport climbs to 55°F on May 9. CSU's typical time from transplant to harvest for tomato plants is 65 days. Set out on May 1, they would start producing around Jul 5, 120 days before the typical first frost (Nov 2).

When to plant peppers in Oklahoma City

Very tender crop. CSU Extension's rule is 2+ weeks after the average last frost, which puts peppers outside around Apr 18 (typical date), Apr 24 (balanced) or May 4 (safer 10% date). Start seeds indoors Feb 27 – Mar 13, 6–8 weeks ahead of transplanting on Apr 24. Fruit set suffers when nights drop below 55°F (CSU). The normal low at Oklahoma City Will Rogers Airport reaches 55°F on May 9. Set out on Apr 24, pepper plants would start producing around Jul 3, based on CSU's typical 70 days from transplant to harvest. That leaves 122 days before the typical first frost (Nov 2).

When to plant potatoes in Oklahoma City

Semi-hardy crop. Per CSU, potatoes can go in as early as 0–2 weeks before the average last frost: roughly Mar 21 – Apr 4 in Oklahoma City (typical date) or Apr 6–20 (safer date). The soil should be at least 45°F.

When to plant onions (dry, from sets) in Oklahoma City

Hardy crop. CSU says onions (dry, from sets) can go in as early as 2–4 weeks before the average last frost: roughly Mar 7–21 in Oklahoma City using the typical date, or Mar 23 – Apr 6 using the safer one. Wait until the soil can be worked and is at least 35°F.

When to plant peas in Oklahoma City

Hardy crop. CSU says peas can go in as early as 2–4 weeks before the average last frost, once the soil can be worked and is at least 40°F. In Oklahoma City, that's roughly Mar 7–21 going by the typical date, or Mar 23 – Apr 6 going by the safer date. For fall, count back 79 days from the first-frost date. That means sowing by Aug 15, or by Aug 3 to be safe.

When to plant lettuce (leaf) in Oklahoma City

Hardy crop. CSU says lettuce (leaf) can go in as early as 2–4 weeks before the average last frost, once the soil can be worked and is at least 35°F. In Oklahoma City, that's roughly Mar 7–21 going by the typical date, or Mar 23 – Apr 6 going by the safer date. For fall, sow by Aug 20 (Aug 8 to be safe), which is 74 days before the first-frost date.

When to plant carrots in Oklahoma City

Semi-hardy crop. Per CSU, carrots can go in as early as 0–2 weeks before the average last frost: roughly Mar 21 – Apr 4 in Oklahoma City (typical date) or Apr 6–20 (safer date). The soil should be at least 40°F. For fall, sow by Aug 10 (Jul 29 to be safe), which is 84 days before the first-frost date.

When to plant beans (snap) in Oklahoma City

Tender crop. Sow beans (snap) around the average last frost, per CSU: about Apr 4 in Oklahoma City. Waiting until Apr 20 cuts the chance of a later 32°F night to 1 in 10. Seeds need soil of at least 55°F. For fall, sow by Aug 6 (Jul 25 to be safe), which is 88 days before the first-frost date.

When to plant summer squash in Oklahoma City

Tender crop. CSU says to sow summer squash around the average last frost, about Apr 4 in Oklahoma City. If you want only a 1-in-10 chance of a later 32°F night, wait until Apr 20. Seeds need soil of at least 60°F. For fall, count back 78 days from the first-frost date. That means sowing by Aug 16, or by Aug 4 to be safe.

When to plant broccoli in Oklahoma City

Hardy crop. CSU says broccoli can go in as early as 2–4 weeks before the average last frost, once the soil can be worked and is at least 40°F. In Oklahoma City, that's roughly Mar 7–21 going by the typical date, or Mar 23 – Apr 6 going by the safer date. CSU's typical time from transplant to harvest for broccoli plants is 65 days. Set out on Mar 13, they would start producing around May 17, 169 days before the typical first frost (Nov 2). Fall broccoli: set transplants out by Aug 15. The date counts back from the typical first frost (Nov 2) by UNL Extension's method, using CSU's 65 days from transplant to harvest. Home-grown transplants need seeds started Jun 27 – Jul 11 (CSU: 5–7 weeks).

When to plant cabbage in Oklahoma City

Hardy crop. Per CSU, cabbage can be planted as early as 2–4 weeks before the average last frost, as long as the soil is workable and at least 40°F. For Oklahoma City, that works out to roughly Mar 7–21 (typical date) or Mar 23 – Apr 6 (safer date). Set out on Mar 13, cabbage plants would start producing around Jun 6, based on CSU's typical 85 days from transplant to harvest. That leaves 149 days before the typical first frost (Nov 2). For a fall crop, set cabbage transplants out by Jul 26. That's UNL Extension's count-back from the typical first frost (Nov 2), using CSU's 85 days from transplant to harvest. If you grow your own transplants, start seeds Jun 7–21 (CSU: 5–7 weeks to transplant size).

When to plant cauliflower in Oklahoma City

Semi-hardy crop. CSU allows planting cauliflower as early as 0–2 weeks before the average last frost, in soil at 40°F or warmer. For Oklahoma City, that's roughly Mar 21 – Apr 4 by the typical date or Apr 6–20 by the safer date.

When to plant kohlrabi in Oklahoma City

Hardy crop. CSU says kohlrabi can go in as early as 2–4 weeks before the average last frost, once the soil can be worked and is at least 40°F. In Oklahoma City, that's roughly Mar 7–21 going by the typical date, or Mar 23 – Apr 6 going by the safer date. For a fall crop, sow by Aug 30, or by Aug 18 to be safe. That's 64 days back from the first-frost date.

When to plant green onions in Oklahoma City

Hardy crop. CSU says green onions can go in as early as 2–4 weeks before the average last frost, once the soil can be worked and is at least 35°F. In Oklahoma City, that's roughly Mar 7–21 going by the typical date, or Mar 23 – Apr 6 going by the safer date. For fall, sow by Aug 20 (Aug 8 to be safe), which is 74 days before the first-frost date.

When to plant radishes in Oklahoma City

Hardy crop. CSU says radishes can go in as early as 2–4 weeks before the average last frost, once the soil can be worked and is at least 40°F. In Oklahoma City, that's roughly Mar 7–21 going by the typical date, or Mar 23 – Apr 6 going by the safer date. For a fall crop, sow by Sep 19, or by Sep 7 to be safe. That's 44 days back from the first-frost date.

When to plant spinach in Oklahoma City

Hardy crop. CSU says spinach can go in as early as 2–4 weeks before the average last frost, once the soil can be worked and is at least 40°F. In Oklahoma City, that's roughly Mar 7–21 going by the typical date, or Mar 23 – Apr 6 going by the safer date. For fall, sow by Sep 9 (Aug 28 to be safe), which is 54 days before the first-frost date.

When to plant turnips in Oklahoma City

Hardy crop. CSU says turnips can go in as early as 2–4 weeks before the average last frost, once the soil can be worked and is at least 40°F. In Oklahoma City, that's roughly Mar 7–21 going by the typical date, or Mar 23 – Apr 6 going by the safer date. For fall, sow by Aug 30 (Aug 18 to be safe), which is 64 days before the first-frost date.

When to plant beets in Oklahoma City

Semi-hardy crop. Per CSU, beets can go in as early as 0–2 weeks before the average last frost: roughly Mar 21 – Apr 4 in Oklahoma City (typical date) or Apr 6–20 (safer date). The soil should be at least 40°F. For a fall crop, sow by Aug 20, or by Aug 8 to be safe. That's 74 days back from the first-frost date.

When to plant swiss chard in Oklahoma City

Semi-hardy crop. CSU says swiss chard can be planted as early as 0–2 weeks before the average last frost, in soil of at least 40°F. In Oklahoma City, that's roughly Mar 21 – Apr 4 going by the typical date, or Apr 6–20 going by the safer date. For fall, count back 74 days from the first-frost date. That means sowing by Aug 20, or by Aug 8 to be safe.

When to plant parsnips in Oklahoma City

Semi-hardy crop. Per CSU, parsnips can go in as early as 0–2 weeks before the average last frost: roughly Mar 21 – Apr 4 in Oklahoma City (typical date) or Apr 6–20 (safer date). The soil should be at least 35°F.

When to plant sweet corn in Oklahoma City

Tender crop. CSU says to sow sweet corn around the average last frost, about Apr 4 in Oklahoma City. If you want only a 1-in-10 chance of a later 32°F night, wait until Apr 20. Seeds need soil of at least 50°F.

When to plant cucumbers in Oklahoma City

Tender crop. CSU's timing for cucumbers is around the average last frost, which is about Apr 4 in Oklahoma City. For only a 1-in-10 chance of a later 32°F night, hold off until Apr 20. Seeds want soil at 60°F or warmer. For fall, sow by Aug 11 (Jul 30 to be safe), which is 83 days before the first-frost date.

When to plant eggplant in Oklahoma City

Very tender crop. CSU Extension's rule is to set eggplant out at least 2 weeks after the average last frost. That's about Apr 18 using the typical date, Apr 24 as a balanced choice, or May 4 if you go by the safer 10% date. Start seeds indoors Feb 20 – Mar 13, 6–9 weeks before transplanting on Apr 24. Set out on Apr 24, eggplant plants would start producing around Jun 23, based on CSU's typical 60 days from transplant to harvest. That leaves 132 days before the typical first frost (Nov 2).

When to plant cantaloupe in Oklahoma City

Very tender crop. CSU Extension's rule is to plant cantaloupe at least 2 weeks after the average last frost. That's about Apr 18 using the typical date, Apr 24 as a balanced choice, or May 4 if you go by the safer 10% date. Seeds need soil of at least 60°F.

When to plant watermelon in Oklahoma City

Very tender crop. CSU Extension says to plant watermelon 2+ weeks after the average last frost: about Apr 18 (typical date), Apr 24 (balanced) or May 4 (safer 10% date). Wait for soil of at least 60°F.

When to plant winter squash in Oklahoma City

Very tender crop. CSU Extension says to plant winter squash 2+ weeks after the average last frost: about Apr 18 (typical date), Apr 24 (balanced) or May 4 (safer 10% date). Wait for soil of at least 60°F.

How these dates are calculated

CSU states its spring rules relative to “the average last spring frost.” We use the 50% date as that average and also show the 30% and 10% anchors. See the methodology for details and limitations.

FAQ

When should I start seeds indoors in Oklahoma City?

Tomatoes: Mar 13–27. Peppers: Feb 27 – Mar 13. Both windows count back from a balanced (30%-risk) transplant date using CSU's transplant ages.

When should I plant tomatoes outside in Oklahoma City?

Set tomatoes out about May 1 at the earliest, May 1 for a balanced choice, or May 4 to be safe. The earliest date follows CSU Extension's night rule: nights above 52°F, and the average nightly low at Oklahoma City Will Rogers Airport first rises above 52°F on May 1. CSU's other rule, 2+ weeks after the average last frost, would allow about Apr 18.

What can I plant in Oklahoma City in the fall?

Counting back from the typical first frost (Nov 2) with UNL Extension's method: peas by Aug 15; lettuce (leaf) by Aug 20; carrots by Aug 10; beans (snap) by Aug 6; summer squash by Aug 16; broccoli by Aug 15 (transplants); cabbage by Jul 26 (transplants); kohlrabi by Aug 30; green onions by Aug 20; radishes by Sep 19; spinach by Sep 9; turnips by Aug 30; beets by Aug 20; swiss chard by Aug 20; cucumbers by Aug 11.

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