Swiss chard planting calendar for USDA Zone 8b

Charleston SC, Savannah, Mobile, Austin, Jacksonville. Average last spring frost March 15, first fall frost November 15 — a 245-day frost-free season.

Zone fit: excellent

Swiss chard is well suited to Zone 8b. Standard planting dates work with minor adjustments for microclimates.

Key dates

Start seeds indoors

February 8 – February 22

Direct-seed or transplant outdoors

February 15 – March 8

Expected first harvest

April 18 – May 16

Fall planting window

August 30 – September 20

Fall harvest window

October 31 – November 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 8b

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 8b

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.

Join the pilot Browse resources