When to Plant Cotton in Texas: Soil Temp & Frost-Free Window for 140-Day Harvests

Knowing when to plant cotton in Texas can make or break your harvest—especially with 140-day varieties that need perfect timing to thrive. The wrong window means frost damage or missed yields, but getting it right unlocks fluffy bolls and a bountiful 🧵 harvest by fall.

Texas gardeners face unique challenges: North Texas needs to wait until March to avoid late frosts, while South Texas can start as early as January. Soil temperature matters just as much—wait until it hits 60-65°F before planting, or your seeds may rot in cold ground.

I’ve grown cotton across USDA zones 8a-10b, and the difference between a thriving crop and a failed one often comes down to these details. In this guide, I’ll break down the exact planting windows for your region, plus pro tips to extend your growing season.

Ready to turn your Texas backyard into a cotton goldmine? Let’s dive into the science—and avoid the common mistakes that waste years of hard work.

Optimal soil temperature and planting dates by Texas region

Texas' diverse climate means cotton planting dates vary dramatically from North Texas' chilly springs to South Texas' early warm spells. The golden rule? Wait until soil temperatures hit 60-65°F and all frost risk has passed. This ensures strong germination and avoids stunted growth from cold stress.

For North Texas gardeners (USDA Zones 7b-8a), the window is tight—plant between mid-March and mid-May. Areas like Lubbock or Amarillo face later last-frost dates (March 15), so don't rush. Use black plastic mulch to warm soil faster if needed.

In Central/East Texas (Zones 8a-9a), you've got flexibility. Start as early as mid-February in Houston or College Station, but aim for March-April for most varieties. The 240-day frost-free window here lets you experiment with early-maturing varieties like 'Deltapine 11' for double harvests.

South Texas (Zones 9b-10b) is the early bird's paradise. Plant cotton as soon as soil warms (January-February) in areas like Brownsville or McAllen. Just watch for late-season heat stress—cotton hates temperatures above 95°F during flowering.

Pro tip: Use a soil thermometer to verify temperatures before planting. Stick it 2 inches deep—that's where cotton seeds need warmth. If your soil runs cooler, try raised beds or row covers to create microclimates.

For container cotton, start seeds indoors 6-8 weeks before your region's last frost. Use biodegradable pots to avoid root disturbance when transplanting. Just remember: containers dry out faster, so monitor moisture closely during Texas' 100°F+ summers.

Timing isn't just about frost—it's about heat tolerance. Plant too late in South Texas, and you'll miss the optimal 140-day window before summer's brutal heat sets in. Aim for flowering by June to avoid boll rot from extreme temperatures.

One mistake we see often? Planting based on calendar dates instead of actual soil temps. A cold snap in April can wipe out young seedlings faster than you'd think. Always check the Texas A&M AgriLife Extension for your county's 30-day forecast before committing to a planting schedule.

Need extra insurance? Try succession planting—sow seeds every 2 weeks in Central/South Texas to stagger your harvest. This spreads risk and gives you multiple boll openings instead of one big event.

Optimal soil temperature and planting dates by Texas region

Texas' diverse climate means your cotton planting window varies dramatically from the Panhandle to South Texas. The golden rule? Wait until soil temperatures hit 60-65°F—cold soil stunts germination.

In North Texas (USDA Zones 8a-8b), where last frosts linger until March 15, aim for late April to early May planting. This gives your 140-day varieties time to mature before November's first frost.

For Central/East Texas (Zones 8a-9a), the window opens earlier. Plant between mid-February and April when soil warms consistently. Our team once planted upland cotton in early March near College Station—only to lose 30% to a late frost.

Lesson learned: Verify your local frost dates using USDA maps or your Cooperative Extension office.

In South Texas (Zones 9b-10b), you've got flexibility. Start as early as January for extra-long varieties or stretch planting through March. The heat tolerance of Pima cotton makes it ideal here, but watch for bolting stress if temperatures exceed 95°F during flowering.

Pro tip: Use a soil thermometer to confirm readiness. Bury it 2 inches deep—that's where your seeds will be. In West Texas, where windburn is a risk, plant near windbreaks or use row covers for young seedlings.

Our team once lost an entire row to desiccating winds in Lubbock; now we stake young plants for support.

For container growing (yes, cotton can thrive in large pots!), start seeds 4-6 weeks before your region's last frost. Use 5-gallon containers with drainage holes—cotton hates soggy roots. Move pots to a sunny patio once soil warms, then transplant outdoors after all danger of frost has passed.

Remember: Early varieties (like Stoneville 213) mature in 120-130 days, while late varieties (like Deltapine 1646) need 150+ days. Match your variety to your local frost-free window—this is the #1 factor in Texas cotton success.

Plant too early, and you'll chase frosts; too late, and you'll miss peak fiber quality.