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Regional Calendars, Climate & DataSouthern Plains Planting Calendar
The Southern Plains can feel like summer in March and winter in April. A good planting plan expects both and builds in time and protection for surprises.
Key points
- Soil temperature at seed depth is a better guide than a warm afternoon.
- Expect late freezes and keep protection ready.
- Plan for drought and flood years in advance.
- A planting log turns weather surprises into usable data.
Why is the Southern Plains calendar so unpredictable?
Warm spells arrive early, then cold fronts push through and bring a freeze after plants have started to grow. Spring storms bring wind and hail, and rainfall swings from flood to drought within a single year. Planting dates here are less about a fixed window and more about reading conditions.
Soil temperature is a steadier guide than air temperature. A warm week can raise soil temperature, but a single cold front can drop it quickly. Track several days of readings at seed depth before you commit.
What crops fit the Southern Plains?
Winter wheat is a defining crop of the region, seeded in fall and grazed or harvested the next season. Warm-season crops such as cotton, sorghum, corn, peanuts and soybeans follow in spring and early summer, each with its own soil temperature needs and insurance dates.
Garden crops split into early cool-season plantings and a later warm-season group. Tomatoes and peppers often set best in spring and again in fall, because very hot nights interfere with fruit set. Check your state extension planting guide for the range for your area.
- Fall: winter wheat, cover crops
- Spring: corn, sorghum, cotton, peanuts, soybeans
- Garden: cool crops early, warm crops after frost risk passes
How do you handle late freeze risk?
Treat the average last frost as a midpoint. Use National Weather Service station data to see how much the last freeze varies from year to year at your location, and plan protection for the early part of your planting window.
For gardens and small plots, frost cloth and quick covers protect transplants on freeze nights. For field crops, ask a crop adviser how to evaluate frost injury and when replanting makes sense, and review the replant provisions of crop insurance before making a move.
How do heat and wind shape planting depth and timing?
Hot, windy conditions dry seedbeds fast. Planting into moisture, even if slightly deeper than usual, can improve stands when the surface is dry, and residue helps hold moisture. Seed that sits in dry soil may germinate unevenly after the next rain, so stands can be patchy.
In gardens, mulch, shade cloth and drip irrigation soften the effect of heat and wind. Follow local water restrictions, which can change quickly in drought.
How should you plan for drought and for flood years?
Plan two ways. In dry years, conserve moisture, adjust crop mix and plan around water availability. In wet years, expect delays and look for crops with later planting windows that can fill in prevented-planting acres.
The U.S. Drought Monitor gives a regular picture of conditions. For crop insurance rules on prevented planting and final planting dates, speak with your agent and USDA RMA. Irrigation timing should follow soil moisture and local water rules.
How do you build your own Southern Plains calendar?
For example, if your last spring frost usually falls in late March, you might hold tender garden transplants until after that date plus a safety margin, and plant heat-loving field crops as soil warms. This illustrates the approach and is not a date for your county.
Log your planting date, soil temperature, rain after planting and stand result. Over a few years the log will show how often late cold fronts and early heat catch your site, and it becomes a calendar based on your own ground.
What mistakes cost Southern Plains growers the most?
The classic mistake is planting on the first warm spell. A freeze or a cold rain after planting can ruin a stand and force a costly replant. The second is planting too deep or too shallow for the moisture available, which leaves seed in dry soil or in soil that crusts. The third is ignoring wind erosion risk on bare, loose ground.
Another mistake is relying on one soil temperature reading. Record several days of morning readings at seed depth, and compare them with the minimum recommended for your crop by your state extension. Check your state extension planting guide for the range for your area.
Hail and storm damage are risks that planting dates cannot remove. Crop insurance and records are tools to discuss with your agent, and USDA RMA and FSA offices can explain the programs available in your county. Keep dated photos and notes of any damage in case you need to file.
- Take several morning soil readings
- Keep frost cover ready
- Know your crop insurance final planting dates
Sources and further reading
Last reviewed: November 2026. Educational information, ranges only. Confirm timing with your county extension office.