Swiss chard 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: good

Cool-season crops bolt fast under Zone 9b heat. Prioritize the fall planting window and use shade cloth for any spring succession.

Key dates

Start seeds indoors

January 1 – January 15

Direct-seed or transplant outdoors

January 8 – January 29

Expected first harvest

March 11 – April 8

Fall planting window

September 29 – October 20

Fall harvest window

November 30 – December 28

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: 10″
Row spacing: 18″
Seed depth: 0.5″
Soil temperature: 50–75°F
Frost tolerance: hardy
Days to harvest: 55 days

Grower notes for Zone 9b

Cut-and-come-again crop. A spring planting can produce well into fall with cool weather and consistent water.

Plant near: beans, onions

Keep away from: corn

Other leafy greens for Zone 9b

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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