Brussels sprouts planting calendar for USDA Zone 9a

Gainesville FL, Houston, New Orleans, southern GA coast. Average last spring frost February 25, first fall frost December 1 — a 279-day frost-free season.

Zone fit: challenging

Brussels sprouts need sustained cool weather for tight sprouts — Zone 9 heat often causes loose, open buds.

Key dates

Start seeds indoors

January 7 – January 21

Transplant outdoors

February 4 – February 25

Expected first harvest

May 22 – June 19

Fall planting window

July 21 – August 11

Fall harvest window

November 5 – December 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: 24″
Row spacing: 36″
Seed depth: 0.25″
Soil temperature: 55–75°F
Frost tolerance: hardy
Days to harvest: 100 days

Grower notes for Zone 9a

Fall-only crop in the Southeast. Top the plant 4 weeks before target harvest for uniform sprouts up the stem.

Plant near: onions, dill

Keep away from: strawberries

Other brassicas for Zone 9a

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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