🌽 Can I Plant Corn in San Antonio, TX?
Corn is frost-sensitive and needs nights above 55°F. Forecast lows of ~0°F pose a real risk of frost damage. Wait until after your last frost date.
Growing Corn in San Antonio
San Antonio's Zone 8b climate supports a very long growing season approaching 270 days. The hot summers mean many gardeners favor a split spring/fall approach for heat-sensitive crops, reserving the peak of summer for the most heat-tolerant plants like sweet potatoes, okra, and southern peas.
In San Antonio (last frost around February 28), aim to direct sow or transplant corn outside around March — approximately 2 weeks after your last expected frost.
Corn thrives between 65°F and 95°F. It is frost-sensitive, meaning a single freeze at 32°F will damage or kill it — always wait until frost danger has fully passed. Expect 60–100 days from transplant to first harvest. Needs warm soil. Plant in blocks.
Frequently Asked Questions
When can I plant corn in San Antonio, TX?
In San Antonio (last frost around February 28), aim to direct sow or transplant corn outside around March — approximately 2 weeks after your last expected frost.
What is the USDA hardiness zone for San Antonio?
San Antonio, TX is in USDA Plant Hardiness Zone 8b. The last expected spring frost is around February 28, and the first fall frost arrives around November 28. This zone classification helps you understand which perennials survive winter and when annual vegetables can safely go outdoors.
Is it safe to plant corn outside in San Antonio right now?
That depends on the current weather forecast. Corn needs temperatures above 55°F (ideally 65–95°F) to thrive. CanIPlant checks your real 7-day forecast and any active frost alerts to give you a live YES, NO, or WAIT answer — just enter your ZIP code.
Can I grow corn in San Antonio 2026?
Yes — Corn grows well in San Antonio, TX. With a Zone 8b climate and a growing season of ~274 days, San Antonio is well-suited for warm-season crops like corn. Just wait until after the last frost (around February 28) before moving plants outside.
Grow Corn in Other Cities
Get a live answer for your exact address
Enter your ZIP code — CanIPlant checks your real 7-day forecast, frost alerts, and 30-year climate data to tell you whether to plant corn right now.
Check My ZIP Code →