Corn in Zone 7B — Texas

Growing corn in Zone 7B Texas gives you access to that incredible sweet, crisp flavor that store-bought corn can never match. With our long 255-day growing season and intense Texas heat, you can actually grow multiple corn plantings for fresh ears from late spring clear through fall. There's nothing quite like walking out to your garden on a summer evening and picking corn that was pollinating just weeks ago.

Yes, our unpredictable weather and brutal summer heat present challenges, but corn actually thrives in hot conditions once established. The key is timing your plantings to work with our climate patterns rather than against them. With proper planning, you'll have fresh corn during the cooler months and can avoid the worst of our summer extremes.

While corn can be transplanted, it's rarely the best approach in Texas since corn doesn't handle root disturbance well and grows so quickly from seed. If you do choose to transplant, your window runs from late March through late April, after our last frost risk has passed.

Start hardening off transplants a full week before planting out, giving them gradually longer exposure to our variable spring weather. Space transplants 8-12 inches apart in rows, giving each plant room to develop its full root system. Our spring weather can swing wildly, so be prepared to protect young transplants if an unexpected cold front moves through.

Direct sowing is absolutely the way to go with corn in Texas. Your planting window stretches from mid-March through late August, giving you multiple opportunities for successive plantings. Wait until soil temperatures reach at least 60°F consistently - corn seed will rot in cold, wet soil.

Prepare your planting area with compost worked into loose soil. Plant seeds 8-12 inches apart in blocks rather than single rows to ensure good pollination in our often windy conditions. Cover seeds with about an inch of soil and keep consistently moist until germination, which usually takes 7-10 days in warm Texas soil.

For continuous harvest, plant new rows every 2-3 weeks through early summer, then resume planting in late July for your fall crop. This strategy helps you avoid having all your corn ready during the most brutal heat of August.

Corn has high water needs and absolutely cannot tolerate drought, especially during pollination and ear development. In our unpredictable Texas climate with 15-50 inches of annual rainfall, you'll need to supplement regularly. Plan on providing 1-1.5 inches of water per week, more during our hottest periods when temperatures hit 97°F or higher.

Check soil moisture using the finger test - stick your finger 2 inches down near the base of plants. If it's dry at that depth, water deeply at soil level rather than overhead. Deep, less frequent watering encourages strong root development that helps corn handle our intense heat better.

During silking and ear formation (usually mid-summer in Texas), water becomes absolutely critical. Even a few days of drought stress during this period will result in missing kernels and poorly filled ears. Watch for signs of stress like rolled leaves during the day, which is normal, but leaves that stay rolled into evening signal serious water shortage.

Apply 2-3 inches of organic mulch around plants to conserve moisture and keep roots cooler during our brutal summer heat. This also helps manage the unpredictable swings between drought and flash floods that define Texas weather.

Your first corn harvest typically arrives in late May through early June for spring plantings, with successive plantings extending harvest through mid-November until our first frost hits. Each planting will be ready roughly 75 days from seeding, though extreme heat can slow development slightly.

Check ears when silks turn brown and dry - this usually happens about 20 days after silk emergence. Pull back the husk slightly to check kernel development. Ripe kernels should be plump and squirt milky juice when punctured with your fingernail. If the juice is clear, wait a few more days; if it's thick and doughy, you've waited too long.

Harvest in early morning when sugars are highest, twisting and pulling ears downward from the stalk. Each stalk typically produces 1-2 ears. Corn doesn't continue ripening once picked, so timing is crucial for peak sweetness.

As our first frost approaches in mid-November, harvest any remaining ears even if slightly immature. Green husks can fool you - check the kernels themselves rather than relying on external appearance during our unpredictable fall weather.

Corn Earworm Small holes in husks with brown frass (insect droppings) and chewed kernels inside ears. These caterpillars tunnel directly into developing ears, often entering through the silk channel. Our long, hot Texas summers provide multiple generations of this pest. Apply mineral oil to silk channels every few days after silks appear, or use Bt spray specifically labeled for corn earworm during peak silk production.

Raccoons Stalks knocked over with ears partially eaten and scattered husks throughout the garden. Raccoons have nimble hands and can easily shuck corn, often sampling multiple ears in one night. They're particularly problematic in Texas suburbs where development borders natural areas. Install electric fencing 4-6 inches and 12 inches off the ground, or harvest ears just before full maturity and let them finish ripening indoors.

Poor Pollination Ears with missing kernels in rows, small misshapen ears, or ears that fail to develop despite good silk production. This often results from our extreme Texas heat disrupting pollen viability, typically when temperatures exceed 95°F for several consecutive days during tasseling. Plant corn in blocks rather than single rows to improve pollination success, and consider hand-pollinating with a small brush during the coolest part of morning. Ensure consistent moisture during pollination period.

Texas Specific Challenges: Our extreme heat and variable humidity create perfect conditions for both pest pressure and pollination problems. The unpredictable rainfall pattern means you'll swing between managing drought stress and dealing with too much moisture, both of which affect corn's ability to develop properly.

Plant beans around your corn stalks to create a natural nitrogen source while the climbing beans use corn as support - this classic "Three Sisters" combination works beautifully in Texas heat. Squash and cucumbers make excellent ground covers between corn rows, their large leaves helping shade soil and conserve moisture during our brutal summers. Peas planted as a cool-season crop before corn goes in will add nitrogen to the soil.

Avoid planting tomatoes near corn since both are heavy feeders competing for nutrients, and both attract similar pests like hornworms. In our intense Texas heat, this competition becomes even more problematic as both crops struggle with heat stress. Keep corn plantings away from your main tomato areas to prevent cross-contamination of pest problems.