Brussels sprouts 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: challenging

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

Key dates

Start seeds indoors

December 18 – January 1

Transplant outdoors

January 15 – February 5

Expected first harvest

May 2 – May 30

Fall planting window

August 4 – August 25

Fall harvest window

November 19 – December 17

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 9b

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 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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