When To Plant Sudan In Texas

The best time to plant Sudan grass in Texas is after the last spring frost, typically from late March through early May, when soil temperatures reach at least 65°F.
 
This warm-season annual thrives in the Lone Star State’s intense summer heat, and knowing when to plant Sudan in Texas makes the difference between a lush, productive forage crop and a disappointing, patchy stand.
 
Sudan grass, often called Sudangrass, is a versatile summer annual that many Texas ranchers and gardeners rely on for grazing, hay, silage, or as a fast-growing cover crop.
 
The key to success is matching your planting window to your specific region in Texas, since the state spans multiple USDA hardiness zones with vastly different frost dates.
 
If you plant Sudan too early, cold soil will cause poor germination or even seed rot, while planting too late can expose young seedlings to scorching heat and reduce your total yield.
 
In this post, we’ll break down the exact timing for when to plant Sudan in Texas, region by region, plus tips for soil prep, seeding rates, and maximizing growth.
 
Let’s dig into the details so you can nail that planting window every single year.
 

When to Plant Sudan in Texas: The Core Timing Rules

The simple answer for when to plant Sudan in Texas is to wait until the soil warms up and all danger of frost has passed.
 
Sudan grass is extremely frost-sensitive, so even a light freeze will kill young seedlings instantly.
 
Soil temperature is your best guide—aim for a consistent 65°F to 70°F at a 2-inch depth before you sow those seeds.
 
In most of Texas, this soil temperature threshold is reached between late March and mid-April in the southern and central regions.
 
For the Panhandle and northern parts of the state, you’ll typically wait until late April or even early May.
 
A handy trick is to check your local extension service’s average last frost date and then add roughly two weeks, which gives the soil time to warm up fully.
 
If you plant Sudan when the soil is still cold, the seeds will sit dormant and may become vulnerable to fungal diseases or insect damage while waiting for warmth.
 
On the flip side, planting Sudan grass in late summer for a fall crop is possible in South Texas, but it’s risky since the first fall frost can arrive early.
 
So for most growers, the spring window is your best bet for a robust stand that provides multiple cuttings through the summer.
 

1. Planting Sudan in South Texas (Zones 8-9)

South Texas, including areas like the Rio Grande Valley and San Antonio, has a long warm growing season, so you can start planting Sudan earlier than anywhere else in the state.
 
Here, you can often begin planting Sudan grass as early as mid-March, right after the last frost which typically occurs in late February or early March.
 
By early April, soil temperatures have usually climbed well past the 65°F threshold, making it safe for direct seeding.
 
One benefit of this early start is that your Sudan grass will establish before the blistering summer heat hits in June, giving you a stronger root system.
 
You can also plant Sudan in South Texas again in July for a second summer crop, but you’ll need to ensure adequate irrigation to help it germinate in the dry heat.
 
If you’re in this region and you’re wondering when to plant Sudan in Texas for grazing, aim for 45–60 days before you need the forage to be ready.
 

2. Planting Sudan in Central Texas (Zones 7-8)

Central Texas, including Austin, Waco, and the Hill Country, sees last frost dates typically around mid-March to early April.
 
So the best time to plant Sudan in this region is from late March to mid-April, when soil temps reliably hit 65°F.
 
Planting Sudan a bit later, say in early May, is also fine, but you may sacrifice some yield before the hotter, drier months slow growth.
 
Many Central Texas ranchers use Sudan grass as a summer forage rotation after winter annuals like oats or ryegrass have finished.
 
If you plant Sudan after harvesting a winter crop, you can still get excellent results as long as you do it before mid-May.
 
Monitoring soil moisture is critical here, as Central Texas often experiences spring drought, so a light irrigation right after planting helps guarantee even emergence.
 

3. Planting Sudan in North Texas and the Panhandle (Zones 6-7)

Up in North Texas, Dallas, and the Panhandle, the growing season is shorter, and frost can linger into late April.
 
Therefore, the best time to plant Sudan in Texas for this region is from late April to mid-May, when the soil has finally warmed sufficiently.
 
Planting Sudan too early in May is a common mistake that leads to poor stands, so patience is key.
 
In the Panhandle, especially around Amarillo and Lubbock, you might even delay until late May if the spring has been unusually cool.
 
The tradeoff is that you’ll have a shorter window before the first fall frost, which typically arrives in early October.
 
But Sudan grass grows rapidly once established, so a late April planting can still produce 2–3 cuttings before the season ends.
 
If you want to extend your grazing season here, consider planting Sudan in successive 3-week intervals until mid-June.
 

Tips for a Healthy and Productive Planting of Sudan Grass

Knowing when to plant Sudan in Texas is only half the battle; the other half is doing it right.
 
Here are some practical tips to ensure your Sudan grass thrives from day one.
 
First, always do a soil test before you plant Sudan to check pH and nutrient levels, since this crop prefers a pH between 6.0 and 7.5.
 
Second, prepare a firm, weed-free seedbed—till the soil lightly and then pack it down to ensure good seed-to-soil contact.
 
Third, seed Sudan grass at a rate of 20–30 pounds per acre for dryland conditions, or up to 40 pounds per acre if you plan to irrigate.
 
Plant the seeds at a depth of 1 to 1.5 inches, and make sure the soil is moist but not waterlogged at planting time.
 

1. Fertilize for Maximum Growth

Sudan grass is a heavy nitrogen feeder, so applying 50–80 pounds of nitrogen per acre right after planting Sudan will give it a strong start.
 
You can also add phosphorus and potassium based on your soil test results, but nitrogen is the most critical for leafy growth.
 
If you’re planting Sudan on sandy soils in East Texas, consider splitting your nitrogen applications to reduce leaching from heavy rains.
 

2. Manage Weeds Early

Sudan grass grows so quickly that it often outcompetes weeds, but the first 2–3 weeks after planting Sudan are critical.
 
Use a pre-emergence herbicide that’s labeled for Sudan grass, or simply cultivate shallowly to knock down emerging weeds.
 
Once your Sudan grass reaches 6–8 inches tall, it forms a dense canopy that shades out most competition.
 

3. Irrigation and Drought Considerations

While Sudan grass is drought-tolerant once established, it still needs consistent moisture during germination and early growth.
 
If you’re planting Sudan during a dry spring in Texas, plan to irrigate lightly every few days until seedlings are established.
 
After that, the deep taproots allow it to pull moisture from deeper soil layers, so you can reduce watering significantly.
 

So, When to Plant Sudan in Texas?

The best time to plant Sudan in Texas ultimately depends on your specific location, but the golden rule is to wait for soil temps of 65°F and no frost risk.
 
In South Texas, that means mid-March; in Central Texas, it’s late March to mid-April; and in North Texas, you’ll plant Sudan from late April to mid-May.
 
Sudan grass is a heat-loving powerhouse that rewards timely planting with rapid growth, high yields, and excellent forage quality.
 
By matching your planting date to your region’s climate and following the soil prep tips above, you’ll enjoy a lush, productive stand all summer long.
 
So mark your calendar, check that soil temperature, and get ready to plant Sudan in Texas at the perfect moment this season.