Corn in Zone 6B — Texas

Nothing beats the satisfaction of harvesting your own sweet corn in Texas, where our long growing season gives you multiple chances to get it right. Fresh corn picked at peak ripeness has a sweetness that store-bought ears simply can't match, and with 230 days between frosts, you can succession plant for sweet corn from early summer through fall.

Our unpredictable Texas weather and brutal summer heat can challenge corn growing, but the key is timing your plantings to avoid the worst heat during pollination. With careful planning around our climate patterns, you'll be rewarded with ears that make those summer barbecues truly memorable.

While corn can be transplanted, it's rarely the best choice in Texas since corn doesn't handle root disturbance well and grows quickly from seed. If you do choose to transplant, plan for early April through early May when soil has warmed but before the intense heat arrives.

Harden off transplants gradually over a week, starting with a few hours of morning sun and building up to full exposure. Space plants 8-12 inches apart in blocks rather than single rows to ensure good pollination. Watch for late cold snaps in early April - even a brief dip below 40°F can set back young transplants significantly.

The unpredictable spring weather in Texas makes transplants risky. Direct seeding is more reliable and avoids transplant shock during our temperature swings.

Direct sowing is the recommended method for corn in Texas since it establishes better root systems and avoids transplant shock. Start sowing in early April when soil temperature reaches 60°F and continues through mid-August for fall harvests that avoid the worst summer heat.

Prepare soil by working in compost and ensuring good drainage - corn needs consistent moisture but can't tolerate waterlogged conditions during our flash floods. Plant seeds 1-2 inches deep and 8-12 inches apart in blocks of at least 4 rows for proper wind pollination. In our clay soils, consider raised beds or mounded rows for better drainage.

For succession planting, sow new rows every 2-3 weeks through summer. Time your final planting for mid-August so ears mature before our first frost in early November. The key in Texas is getting corn through pollination before peak summer heat hits - stressed plants during silking produce ears with missing kernels.

Corn has high water needs and absolutely cannot tolerate drought, especially during the critical silking and ear development stages. In Texas, where rainfall ranges from 15-50 inches and comes unpredictably, consistent irrigation is essential for quality ears.

Provide 1-1.5 inches of water weekly, increasing to 2 inches during tasseling and silking when temperatures soar above 95°F. Use the finger test - soil should be moist 2 inches deep. Water deeply at the base rather than overhead to reduce fungal issues in our variable humidity and to ensure water reaches the extensive root system.

During our brutal summer heat, corn may need daily watering, especially in containers or raised beds that dry out quickly. Watch for leaf curling or rolled edges - early signs of drought stress that will impact ear development. Drought during pollination causes those disappointing ears with rows of missing kernels.

Mulch heavily with grass clippings or straw to conserve moisture and keep roots cool during extreme heat. In Texas, consistent moisture is more important than perfect soil - corn will forgive mediocre dirt but not inconsistent watering.

Your first corn harvest will arrive mid-June through early November, roughly 75 days after planting. The key indicators are brown, dry silks and kernels that squirt milky juice when punctured with a fingernail. Pull back the husk slightly to check that kernels are plump and pale yellow.

Harvest in early morning when ears are cool and sugar content is highest. Twist and pull ears downward with a quick motion - they should snap off cleanly. Once picked, corn begins converting sugar to starch immediately, so plan to use fresh ears within hours for best flavor.

Each stalk typically produces 1-2 ears, and unlike some vegetables, corn doesn't continue producing after harvest. Plan successive plantings 2-3 weeks apart if you want fresh corn all season rather than one big harvest.

As early November approaches and first frost threatens, harvest any remaining ears even if they're not fully mature. Green corn can be used for cooking, though it won't have the sweetness of fully ripe ears. The stalks make excellent compost material after harvest.

Corn Earworm Small holes in husks with brown frass (droppings) visible, and you'll find fat caterpillars inside the ears eating kernels. These pests are particularly active during our hot Texas summers and can destroy entire ears. Apply Bt spray when silks first appear and repeat every 5-7 days. Drop a few drops of mineral oil on silk tips after pollination to prevent larvae from entering ears.

Raccoons Stalks knocked down, husks peeled back, and partially eaten ears scattered around the garden - raccoons can devastate a corn crop in one night. They're especially problematic in Texas where urban sprawl meets rural areas. Install electric fencing 6 inches and 12 inches high, or cover ears with paper bags secured with rubber bands once silks brown. Harvest promptly when ears are ready rather than leaving them on stalks.

Poor Pollination Ears with missing kernels in rows, small or misshapen ears, or ears that don't develop at all indicate pollination problems. Texas heat above 95°F during tasseling disrupts pollen viability, and our unpredictable weather can cause timing issues between male tassels and female silks. Plant in blocks of at least 4 rows rather than single rows, and consider hand-pollinating by collecting pollen from tassels in early morning and dusting it on fresh silks.

Texas Specific Challenges: Our extreme summer heat can shut down pollination when temperatures exceed 100°F for extended periods. The combination of intense heat and variable humidity also stresses plants, making them more susceptible to pests and diseases. Time plantings to have silking occur before peak heat or during cooler fall weather.

Plant beans and squash with corn for the classic "Three Sisters" combination that works well in Texas heat. Beans fix nitrogen that corn needs heavily, while squash provides living mulch that conserves moisture during our hot summers. The broad squash leaves also help suppress weeds and keep soil cool.

Cucumbers make good companions since they appreciate corn's afternoon shade during extreme heat, and both crops need consistent moisture. Avoid planting tomatoes near corn - they compete for nutrients and space, and both are heavy feeders that can exhaust soil. Tomatoes also attract similar pests that can move between crops. In Texas, focus on companions that help with water conservation and heat protection rather than just traditional pairings.