Best time to plant corn in mississippi

In Mississippi, the best time to plant corn is between March 15 and April 15 for most of the state, but the exact window depends on your USDA zone and soil temperature. Aim for soil at 50°F or warmer at 2 inches deep, and avoid planting before the last frost date. Here’s the breakdown by zone: Zone 7 (north Mississippi) plant from March 20 to April 10; Zone 8 (central) from March 15 to April 5; Zone 9 (south) from March 1 to March 25. For a fall crop, plant in late July to early August, but spring is the primary season for corn in Mississippi.

Why timing matters

Corn needs warm soil to germinate reliably. If you plant too early, seeds rot in cold, wet ground. If you plant too late, summer heat can stress pollination, especially in July. In Mississippi, the goal is to have corn tassel and silk before the hottest part of summer, typically by late June or early July. That means planting in the spring window above.

Soil temperature and frost dates

Check soil temperature with a soil thermometer (available for $10 to $20 at garden centers or online). Insert it 2 inches deep in the morning; it should read at least 50°F. For best germination, 60°F to 85°F is ideal. Also, know your last frost date: in north Mississippi, it’s around April 10; central, March 30; south, March 15. If frost threatens after planting, cover seedlings with row cover or a light mulch.

Planting dates by zone (2026)

Zone	Spring planting window	Fall planting window
7 (north)	March 20 - April 10	July 25 - August 5
8 (central)	March 15 - April 5	July 20 - August 1
9 (south)	March 1 - March 25	July 15 - July 25

These dates are based on average last frost and heat onset. If you’re using a fast-maturing variety (70 days), you can push the fall window a bit later, but keep in mind that fall corn in Mississippi often struggles with heat and pests, so spring is more reliable.

Choosing the right varieties

For Mississippi, select varieties that mature in 70 to 90 days. Short-season types work well for fall. Here are proven options:

• Silver Queen: classic white sweet corn, 92 days, good for home gardens, but needs space.
• Ambrosia: bicolor, 75 days, very sweet, reliable in the South.
• Merit: yellow, 73 days, good disease resistance.
• Golden Bantam: heirloom yellow, 82 days, open-pollinated, great flavor.

For field corn (for livestock or meal), try ‘Pioneer 1870’ or ‘Dekalb 61-69’, but these are usually planted in April. For sweet corn, you can plant every 2 weeks from the spring window to extend harvest, but stop by mid-May to avoid heat stress.

How to plant corn

1. Prepare the soil: Corn prefers well-drained, loamy soil with pH 6.0 to 6.8. Test soil ($15 to $30 at extension office) and amend with compost or aged manure. Work in 10-10-10 fertilizer at 2 to 3 pounds per 100 square feet.
2. Plant seeds: Sow seeds 1 to 1.5 inches deep, spacing 9 to 12 inches apart in rows 30 to 36 inches apart. For a block, plant at least 4 rows to ensure good pollination. Drop 2 seeds every 12 inches, then thin to one plant per spot.
3. Water: Keep soil moist but not soggy. Corn needs about 1 inch of water per week, more during tasseling and silking.
4. Fertilize: Side-dress with nitrogen when plants are 12 inches tall and again when tassels appear. Use 1 pound of 34-0-0 per 100 feet of row.
5. Mulch: Apply straw or grass clippings to retain moisture and suppress weeds.

Tools and costs

You don’t need fancy equipment. A garden hoe, a trowel, and a soil thermometer are enough. If you’re planting a large area, consider a hand-push planter like the Hoss Garden Seeder ($120 to $150) or a jab planter ($30 to $50). Seeds cost $3 to $8 per packet (about 200 seeds), which covers a 50-foot row.

Common mistakes and how to avoid them

• Planting too early: Check soil temp, not just calendar. Cold, wet soil causes poor germination.
• Planting in single rows: Corn is wind-pollinated; a single row leads to poor kernel set. Plant in blocks of at least 4 rows.
• Skipping nitrogen: Corn is a heavy feeder. Without enough nitrogen, leaves yellow and ears are small.
• Ignoring pests: Watch for corn earworm and fall armyworm. Use Bt spray or spinosad ($15 to $25 per bottle) when silks appear.

Fall planting considerations

Fall corn in Mississippi is possible but trickier. Plant in late July to early August, but expect higher pest pressure and heat stress. Choose a short-season variety like ‘Early Sunglow’ (63 days) or ‘Spring Treat’ (70 days). Water consistently, as August is often dry. Harvest before first frost, which is usually late October in the north, mid-November in the south.

FAQ

Can I plant corn in Mississippi in May? Yes, but only for a fall harvest or if you use a very short-season variety (under 70 days). May planting for spring corn will likely face heat stress during pollination, reducing yields.

How deep should I plant corn seeds? Plant 1 to 1.5 inches deep. In sandy soil, go deeper (1.5 inches); in clay, shallower (1 inch).

Do I need to soak corn seeds before planting? No. Soaking can cause seeds to rot if soil is cold. Plant dry seeds directly into warm soil.

What is the best fertilizer for corn in Mississippi? Use a balanced fertilizer like 10-10-10 at planting, then side-dress with nitrogen (34-0-0) when plants are knee-high and again at tasseling.

The bottom line

Plant corn in Mississippi in the spring window for your zone, when soil is at least 50°F. Use a block planting method, choose a variety suited to your area, and stay on top of water and fertilizer. With these steps, you’ll have a good chance of a sweet, satisfying harvest. For fall, plant in late July, but keep expectations modest. Now, check your soil temperature and get those seeds in the ground.