When To Plant Sweet Corn In Mississippi

The best time to plant sweet corn in Mississippi is between March and July, depending on your exact location within the state.
 
When you plant sweet corn in Mississippi, timing is everything because this warm-season crop absolutely hates cold soil and frost.
 
The key to knowing when to plant sweet corn in Mississippi is understanding your region’s last frost date and soil temperature.
 
In this post, we’ll break down the perfect planting windows, how to check soil warmth, and tips for getting a second harvest.
 
Let’s dig into the details so you can enjoy the sweetest, juiciest corn possible from your Mississippi garden.
 

When to Plant Sweet Corn in Mississippi by Region

Mississippi spans USDA hardiness zones 7a through 9a, so when to plant sweet corn in Mississippi shifts depending on whether you’re up north or down south.
 
The northern part of the state, around Tupelo and Oxford, stays cooler longer, so you’ll plant later in the spring.
 
Central Mississippi, including Jackson, falls right in the middle with a comfortable planting window that starts in early April.
 
Southern Mississippi, near Gulfport and Biloxi, warms up fastest, so you can plant sweet corn as early as mid-March.
 

1. Northern Mississippi Planting Window

For gardeners in the northern counties, when to plant sweet corn in Mississippi begins around April 10 to April 20.
 
The last frost date in this region typically lands in early April, so wait until after that to put seeds in the ground.
 
Soil temperatures need to be at least 60°F, and northern Mississippi often doesn’t reach that until mid-April.
 
If you plant too early and a cold snap hits, your sweet corn seeds will rot in the cold, wet soil.
 
You can plant a second crop in late May or early June for a fall harvest in northern Mississippi.
 

2. Central Mississippi Planting Window

When to plant sweet corn in Mississippi for central gardeners is usually from April 1 through May 15.
 
The risk of frost drops significantly after the first week of April in the Jackson area.
 
Central Mississippi soil warms up nicely by early April, so your sweet corn seeds will germinate quickly.
 
You can also get a late summer crop by planting again in late June or early July.
 
Just keep in mind that July heat can stress the plants, so water consistently during pollination.
 

3. Southern Mississippi Planting Window

For the Gulf Coast region, when to plant sweet corn in Mississippi starts as early as March 15.
 
Southern Mississippi rarely sees frost after mid-March, and soil temperatures climb fast in the coastal climate.
 
You can begin planting sweet corn in March, and you can continue staggering plantings every two weeks until mid-July.
 
This gives you a nearly continuous supply of fresh corn from late spring through early fall.
 
Just be sure to choose heat-tolerant varieties for the summer months in the south.
 

Soil Temperature and Frost Considerations

The most critical factor for when to plant sweet corn in Mississippi is soil temperature, not just the calendar date.
 
Sweet corn seeds will not germinate well if the soil temperature is below 55°F, and they prefer 60°F to 85°F.
 
Use a soil thermometer and check the ground at a depth of about two inches in the morning.
 
If the soil hasn’t reached 60°F yet, wait a few more days before planting sweet corn in Mississippi.
 
Frost is the other big enemy, as a single frost event can kill young sweet corn seedlings instantly.
 
Always monitor the extended forecast and have row covers ready just in case temperatures dip unexpectedly.
 

1. How to Warm Up Your Soil

If you’re eager to plant early, you can warm up your soil with black plastic mulch or landscape fabric.
 
This covering traps heat from the sun and can raise soil temperatures by 5 to 10 degrees.
 
Lay the plastic down a couple of weeks before you plan to plant sweet corn in Mississippi.
 
Cut small holes in the plastic when you’re ready to sow the seeds.
 
This trick works especially well in northern and central Mississippi where early springs are cooler.
 

2. Protecting Against Late Frost

Even after you’ve determined when to plant sweet corn in Mississippi, a surprise frost can still threaten your crop.
 
Keep floating row covers or old bedsheets on hand to drape over plants during cold nights.
 
If frost is forecast, water your sweet corn thoroughly the evening before, as moist soil holds heat better.
 
You can also plant in blocks rather than long rows, which helps the plants warm each other.
 
Taking these precautions means you won’t lose your entire sweet corn planting to a late cold snap.
 

Planting Sweet Corn in Mississippi for a Second Harvest

One of the best parts about knowing when to plant sweet corn in Mississippi is that you can often get two harvests.
 
The long, warm growing season in Mississippi supports a spring crop and a fall crop in most regions.
 
For the spring crop, plant as early as your region allows, usually between March and April.
 
For the fall crop, plant sweet corn in Mississippi about 80 to 90 days before your first expected fall frost.
 
Mississippi’s first fall frost typically arrives in late October or early November, so plan accordingly.
 

1. Timing Your Fall Planting

In northern Mississippi, plant your fall sweet corn crop by mid-July to ensure it matures before frost.
 
Central Mississippi gardeners can plant a fall crop in late July or early August.
 
Southern Mississippi allows you to plant sweet corn as late as mid-August for a fall harvest.
 
Always check the days to maturity on your sweet corn variety and count backward from your frost date.
 
This backward planning is the foolproof way to nail when to plant sweet corn in Mississippi.
 

2. Choosing the Right Variety

Some sweet corn varieties mature faster than others, so variety selection affects when you can plant.
 
Early-maturing varieties like ‘Early Sunglow’ are perfect for the first planting of the season.
 
Mid-season varieties like ‘Silver Queen’ work well for the main spring and early summer crops.
 
Heat-tolerant types like ‘Merit’ are ideal for late summer plantings in southern Mississippi.
 
Match your variety to your planting date, and you’ll have sweet corn all season long.
 

So, When to Plant Sweet Corn in Mississippi?

The best time to plant sweet corn in Mississippi is from mid-March in the south to late April in the north.
 
If you’ve been wondering when to plant sweet corn in Mississippi, just remember the golden rules we covered.
 
Wait until the soil is at least 60°F and all danger of frost has passed in your specific region.
 
Northern Mississippi can plant from mid-April to early May, central from early April to mid-May, and southern from mid-March onward.
 
You can also plant sweet corn in Mississippi again in midsummer for a tasty fall harvest.
 
With the right timing and a little attention to soil warmth, you’ll be biting into fresh, sweet corn before you know it.
 
Happy planting, and here’s to a bumper crop of Mississippi sweet corn this year.