🌽 Can I Plant Corn in Modesto, CA?

2026 planting guide for Zone 9b · Last frost ~February 5 · Growing season ~297 days

⏳ WAIT — Temps borderline — ideal is 65°F+ overnight

Conditions are above the minimum safe threshold but still below ideal for Corn. Overnight lows of 65°F+ would give much better results.

Planting window: Aug 13 – Aug 27
Wait a bit longer. Watch for overnight lows to reliably reach 65°F.
Live result based on current forecast for Modesto, CA · Updates every 6 hours
USDA Zone
9b
Last Spring Frost
~February 5
First Fall Frost
November 28
Growing Season
~297 days
Ideal Temp for Corn
65–95°F
Frost Risk
⚠️ Sensitive

Growing Corn in Modesto

Modesto's Zone 9b Central Valley location in Stanislaus County sits in the agricultural heartland of California. Hot, dry summers and mild winters support a long growing season. Tomatoes, peppers, corn, and melons thrive in Modesto's heat. Cool-season crops do well in fall and winter when temperatures moderate. The surrounding almond orchards signal how productive this region's sun and soil can be for diverse crops.

In Modesto (last frost around February 5), aim to direct sow or transplant corn outside around February — 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 Modesto, CA?

In Modesto (last frost around February 5), aim to direct sow or transplant corn outside around February — approximately 2 weeks after your last expected frost.

What is the USDA hardiness zone for Modesto?

Modesto, CA is in USDA Plant Hardiness Zone 9b. The last expected spring frost is around February 5, 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 Modesto 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 Modesto 2026?

Yes — Corn grows well in Modesto, CA. With a Zone 9b climate and a growing season of ~297 days, Modesto is well-suited for warm-season crops like corn. Just wait until after the last frost (around February 5) before moving plants outside.

Grow Corn in Other Cities

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