Arkansas farmers typically plant corn from mid-March through April to avoid both late frosts and summer heat stress. Finding the best time to plant corn in Arkansas depends on your specific region, soil temperature, and the variety you choose. Getting the timing right can mean the difference between a bumper crop and a disappointing harvest.
Corn is sensitive to cold soil and frost, but it also struggles if planted too late when summer heat arrives. In this guide, we’ll walk you through everything you need to know about planting corn in Arkansas for maximum yield.
Best Time To Plant Corn In Arkansas
The ideal planting window for corn in Arkansas runs from mid-March to late April. This timing helps you avoid the last spring frost while giving the crop enough time to mature before the hottest summer days. Soil temperature should be at least 50°F at a 2-inch depth, with a warming trend forecasted.
If you plant too early, cold soil can cause seed rot or poor germination. Plant too late, and pollination may happen during extreme heat, which reduces kernel set. The goal is to hit that sweet spot where soil is warm enough and the risk of frost is low.
Regional Differences Across Arkansas
Arkansas has three main growing regions: the Delta (east), the River Valley (central), and the Ozarks (northwest). Each area has slightly different weather patterns that affect planting dates.
- Delta region: Warmer soils arrive earlier. Start planting around March 15–April 10.
- River Valley: Moderate climate. Aim for March 20–April 15.
- Ozarks: Cooler with later frosts. Wait until April 1–April 25.
Always check your local frost dates. A light frost can kill young corn plants, so don’t rush if a cold snap is forecasted.
Soil Temperature Matters More Than Calendar Date
While the calendar gives you a general window, soil temperature is the real boss. Corn seeds need soil at least 50°F to germinate properly. At 50–55°F, germination is slow but steady. At 60°F or above, seedlings emerge faster and more uniformly.
Use a soil thermometer to check temps at 2 inches deep. Measure in the morning for the most accurate reading. If the soil is below 50°F, wait a few days and check again.
How To Warm Soil Faster
If you’re eager to plant early, you can warm the soil by removing crop residue or using black plastic mulch. Raised beds also warm up quicker than flat ground. Just remember that a warm spell doesn’t mean frost is gone for good.
Corn Variety And Maturity Days
Different corn hybrids have different maturity times, usually measured in days from planting to harvest. In Arkansas, you’ll want varieties that mature in 100–120 days. Shorter-season corn (85–95 days) works well for later plantings or northern areas.
- Early-season hybrids: 85–100 days. Good for northern Arkansas or double-cropping.
- Mid-season hybrids: 100–115 days. Most common for full-season corn.
- Late-season hybrids: 115–130 days. Riskier in Arkansas due to summer heat.
Choose a hybrid that fits your region and intended harvest date. Your local extension office can recommend varieties that perform well in your area.
Factors That Affect Planting Timing
Several factors beyond the calendar influence when you should plant. Pay attention to these to fine-tune your schedule.
Frost Dates
The average last spring frost in Arkansas ranges from late March in the south to mid-April in the north. Corn seedlings can survive a light frost (28–32°F) but will be damaged or killed by a hard freeze (below 28°F).
Check historical frost dates for your county. Then add a safety margin of at least a week after the last expected frost before planting.
Rainfall And Soil Moisture
Planting into wet soil can cause compaction and poor seed-to-soil contact. Wait until the soil is moist but not soggy. If you can squeeze water from a handful of soil, it’s too wet.
On the flip side, planting into dry soil means seeds may not germinate until rain comes. Aim for soil that crumbles easily in your hand.
Insect And Disease Pressure
Planting early can help corn avoid some insect pests like corn earworm and fall armyworm, which build up later in the season. However, early planting may expose seedlings to cooler soil diseases like pythium.
Use treated seed or fungicide if you plant early. Later plantings face more insect pressure but warmer soil reduces disease risk.
Step-By-Step Planting Guide
Follow these steps to plant corn at the right time and get strong stands.
- Test your soil. Corn prefers a pH of 6.0–6.8. Get a soil test 2–3 months before planting to adjust pH and nutrients.
- Choose your hybrid. Select a variety suited to your region and maturity needs.
- Prepare the seedbed. Till or no-till based on your system. Ensure good seed-to-soil contact.
- Check soil temperature. Use a thermometer at 2 inches deep. Wait for 50°F minimum with warming trend.
- Monitor the forecast. Avoid planting if heavy rain or frost is expected within 5 days.
- Plant at the right depth. Corn should be 1.5–2 inches deep in most Arkansas soils. Shallower in heavy clay, deeper in sandy soil.
- Use proper spacing. Plant seeds 6–8 inches apart in rows 30–36 inches apart. Final population should be 28,000–32,000 plants per acre.
- Apply starter fertilizer. A small amount of nitrogen and phosphorus near the seed helps early growth.
- Roll or cultipack after planting. This ensures good seed-to-soil contact in no-till or rough seedbeds.
What If You Miss The Ideal Window?
If you can’t plant during mid-March to April, don’t panic. You can still plant corn in early May, but yields may drop. For every day planting is delayed after April 20, you may lose 0.5–1 bushel per acre.
If planting in May, switch to a shorter-season hybrid (85–95 days). Also consider increasing plant population slightly to compensate for lower yield potential.
Common Mistakes To Avoid
Even experienced growers make errors. Here are the most common ones with corn planting timing.
- Planting too early: Cold soil leads to poor germination and seedling diseases.
- Planting too deep: Seeds placed deeper than 2 inches struggle to emerge in cool soil.
- Ignoring soil moisture: Planting in wet soil causes sidewall compaction and poor root development.
- Using wrong hybrid: Long-season corn planted late may not mature before frost.
- Skipping soil test: Without knowing your pH and nutrients, you risk low yields.
Frequently Asked Questions
What is the best month to plant corn in Arkansas?
Mid-March to late April is the best window, depending on your region and soil temperature.
Can I plant corn in May in Arkansas?
Yes, but yields will likely be lower. Use a short-season hybrid and plant early in May for best results.
How deep should I plant corn in Arkansas?
Plant 1.5–2 inches deep. Go shallower in heavy clay and deeper in sandy soils.
What soil temperature does corn need to germinate?
Corn needs at least 50°F at 2 inches deep. Warmer soil (60°F+) gives faster, more uniform germination.
Should I plant corn before or after a rain?
Plant after rain when soil is moist but not wet. Avoid planting right before heavy rain that could cause crusting or erosion.
Final Tips For Success
Timing is everything with corn, but it’s not the only factor. Good seedbed preparation, proper fertility, and weed control are just as important. Talk to your local county extension agent for specific advice tailored to your farm.
Keep a planting journal each year. Note soil temperature, weather, and emergence dates. Over time, you’ll learn the perfect window for your fields. The best time to plant corn in Arkansas is when soil, weather, and your schedule align for a strong start.
Remember that corn is a warm-season crop, but it doesn’t like extreme heat during pollination. By planting in the recommended window, you give your crop the best chance to thrive. Happy planting, and may your fields be golden come harvest.