Plant tomatoes in Texas between late February and mid-March for spring harvest, or in late July and August for fall harvest

Texas spans three USDA hardiness zones, so your planting window depends on where you live. The state's two growing seasons—spring and fall—let you grow tomatoes twice a year if you time it right. Spring planting happens when soil reaches 60°F consistently and frost danger has passed. Fall planting works because Texas summers are too hot for tomato fruit to set, but cooler fall weather allows a second crop to mature before the first hard freeze.

The key is soil temperature, not air temperature. Tomato seeds and transplants sit dormant in cold soil and rot easily. A soil thermometer costs $8 to $15 and takes the guesswork out of planting day. Check soil temperature in the morning, 4 inches deep, in the spot where you plan to plant.

Key Takeaways

  • Spring planting in Texas runs from late February in South Texas to mid-March in North Texas, once soil reaches 60°F and the last frost date has passed.
  • Fall planting happens in late July and August so tomatoes mature before the first freeze, which arrives between October and December depending on your region.
  • Soil temperature matters more than air temperature—tomatoes need soil at least 60°F to germinate or transplant successfully.
  • Determinate (bush) varieties mature faster and work better for fall planting; indeterminate (vining) varieties need the full spring season to produce heavily.

Spring Planting Dates by Texas Region

South Texas (San Antonio, Corpus Christi, Rio Grande Valley) can plant in late February because frost danger ends earlier. Soil typically reaches 60°F by the last week of February. You have until mid-March to plant and still get a full season before summer heat shuts down fruit production in June.

Central Texas (Austin, Waco, San Antonio area) plants from early March to mid-March. The last frost date falls around March 15 to April 1 depending on your exact location. Wait until soil is consistently 60°F before transplanting seedlings or direct-seeding.

North Texas (Dallas, Fort Worth, Lubbock) and East Texas (Tyler, Longview) plant from mid-March through early April. Frost danger persists longer, and soil warms more slowly. The last frost date in Dallas is around April 8; in Lubbock it can be as late as May 1. Planting too early wastes seed and seedlings to cold soil.

West Texas (El Paso) has a shorter growing season and intense summer heat. Plant in early March if soil is warm enough, but be ready for late freezes. Afternoon shade cloth becomes necessary by May in El Paso because temperatures exceed 95°F regularly.

Fall Planting: Your Second Tomato Season

Fall planting is where Texas gardeners get a real advantage. While most of the country is done growing tomatoes by August, Texas can plant a second crop that matures in the cooler months. Plant in late July or early August so seedlings are established before the worst heat arrives.

Soil temperature in July and August is well above 60°F—often 75°F to 85°F—so germination is fast. Seedlings started indoors in early July can go in the ground by late July. Direct-seeding works too, though seeds germinate so quickly in hot soil that you must water constantly to prevent them from drying out.

The race is against your first freeze date. South Texas freezes in late November or December; Central Texas around November 1 to November 15; North Texas around October 15 to November 1; and West Texas can freeze as early as October 1. Count backward from your freeze date: determinate varieties need 60 to 75 days to produce fruit; indeterminate varieties need 75 to 85 days. If your first freeze arrives October 15, plant by early August at the latest.

Choosing Varieties for Spring vs. Fall

Determinate (bush) tomatoes grow to a fixed size, flower all at once, and finish producing in 60 to 75 days. They are ideal for fall planting because they mature quickly before frost. Varieties like 'Roma', 'San Marzano', and 'Mountain Magic' work well. Mountain Magic has built-in disease resistance, which matters in humid Texas summers.

Indeterminate (vining) tomatoes grow continuously, flower over months, and need 75 to 90 days to start producing heavily. They are better for spring planting because they use the entire warm season. 'Sungold', 'Cherokee Purple', and 'Brandywine' are popular indeterminate types. They produce until frost kills the plant, so a spring start gives you fruit from June through September or October.

Heat-tolerant varieties matter in spring. 'Heatwave II', 'Surefire', and 'Phoenix' set fruit even when daytime temperatures exceed 90°F and nighttime temperatures stay above 70°F. Standard varieties often drop flowers when nights are too warm, so fruit production stops in mid-June even though the plant is alive.

Preparing Soil Before Planting

Texas soil varies widely. South and Central Texas often have alkaline, clay-heavy soil. North and East Texas tend toward acidic soil. Before planting, dig a hole and fill it with water; if it drains in under an hour, your soil drains well. If water sits for hours, you have clay and need to amend heavily with compost or aged bark.

Mix 3 to 4 inches of compost into the top 8 to 10 inches of soil before planting. This improves drainage in clay soil and adds organic matter that holds moisture in sandy soil. Tomatoes are heavy feeders, so add a balanced fertilizer (10-10-10 or similar) or work in aged manure. In alkaline soil, add sulfur to lower pH toward the 6.0 to 6.8 range tomatoes prefer.

If you are planting in containers, use a quality potting mix, not garden soil. A 5-gallon bucket works for determinate varieties; indeterminate types need 10 gallons or larger. Container soil dries faster than ground soil, especially in Texas heat, so plan to water daily or use drip irrigation with a timer.

Hardening Off Seedlings Before Transplanting

If you started seedlings indoors, they need to adjust to outdoor sun and wind before going in the ground. This process, called hardening off, takes 7 to 10 days. Place seedlings in a sheltered spot with dappled shade for 2 to 3 hours on day one. Increase sun exposure and time outdoors by an hour or two each day until they spend a full day outside by day 7.

Water seedlings well before transplanting, and plant them in the late afternoon or on a cloudy day to reduce transplant shock. Bury the stem deeper than it was in the pot—tomatoes will root along the buried stem and develop a stronger root system. Space determinate varieties 24 to 30 inches apart; indeterminate types need 36 to 48 inches.

Protecting Young Plants from Late Frost

Even if you plant after the average last frost date, a surprise freeze can kill tender seedlings. Keep frost cloth or old blankets nearby during spring planting. If temperatures drop below 50°F at night, cover plants before sunset and uncover them the next morning. A frost cloth (available at garden centers for $10 to $20) is lighter and easier to manage than blankets.

Water plants well the day before a predicted frost. Moist soil holds heat better than dry soil. If frost does damage the foliage, wait a few days before removing dead leaves—the plant may recover and produce new growth from undamaged stems.

Frequently Asked Questions

Can I plant tomatoes year-round in Texas?

No. Summer heat (June through August) stops tomato flowers from setting fruit because nighttime temperatures stay above 70°F. Fall and spring are the only productive seasons. You can grow tomatoes indoors under lights in winter, but outdoor growing stops during the hottest months.

What if I plant too early and frost kills my seedlings?

Replant when ready. Soil is already warm, so new seedlings will catch up quickly. You lose 2 to 3 weeks of growth but still have time for a full harvest. Keep frost cloth on hand during spring planting season so you can cover plants if temperatures drop unexpectedly.

Is fall planting worth the effort?

Yes, if your first freeze date is late enough. South Texas gardeners often get 8 to 10 weeks of fall harvest. Central Texas gets 6 to 8 weeks. North Texas may only get 4 to 6 weeks, so fall planting is riskier there. Check your local first freeze date before deciding.

Do I need to start seeds indoors or can I direct-seed?

Both work. Direct-seeding saves time and money but requires consistent moisture and takes longer to produce fruit. Starting seeds indoors 6 to 8 weeks before planting gives you a head start and lets you choose the strongest seedlings. In Texas heat, indoor-started transplants often outpace direct-seeded plants.

What temperature should soil be before I plant?

At least 60°F for transplants; 65°F to 70°F is better. Seeds germinate in 60°F soil but slowly. Use a soil thermometer to check 4 inches deep in the morning. If soil is below 60°F, wait a week and check again rather than planting into cold, wet soil where roots rot.