Sweet corn planting calendar for USDA Zone 9b

Orlando, Tampa, San Antonio, southern LA coast. Average last spring frost February 5, first fall frost December 15 — a 313-day frost-free season.

Zone fit: excellent

Sweet corn is well suited to Zone 9b. Standard planting dates work with minor adjustments for microclimates.

Key dates

Direct-seed outdoors

February 5 – February 26

Expected first harvest

April 28 – May 26

Fall planting window

September 15 – October 6

Fall harvest window

December 6 – January 3

Windows are calculated from your zone's average frost dates. Adjust ±1 week for microclimates, elevation, and your own frost records.

Spacing and soil

Plant spacing: 12″
Row spacing: 30″
Seed depth: 1.5″
Soil temperature: 65–85°F
Frost tolerance: tender
Days to harvest: 75 days

Grower notes for Zone 9b

Plant in blocks of 4+ rows for wind pollination. Isolate super-sweet varieties from standard varieties by 250 ft or 14 days.

Plant near: beans, squash, cucumbers

Keep away from: tomatoes

Same crop, other zones

Track your own plantings

BAU Farm Intelligence turns these windows into per-field tasks — indoor seed-start reminders, transplant dates, harvest projections — using your farm's actual frost history.

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