Growing Brussels Sprouts in Zone 11b

Zone 11b has a year-round growing season. Brussels Sprouts can be planted almost any time with proper planning. Last frost: Jan 15. First frost: Dec 31.

Planting Calendar

Indoor

Outdoor

Harvest

Dec 4Dec 31

Season: Jan 15 – Dec 31 (350 days)

Zone11b

Last FrostJan 15

First FrostDec 31

Season Length350 days

Days to Harvest100

SunFull Sun

Frost ToleranceModerate

Spacing24/sqft

When to Plant Brussels Sprouts in Zone 11b

Start Seeds Indoors: Dec 4

Start Brussels Sprouts seeds indoors around Dec 4 (6 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 5–10 days.

Transplant Outdoors: Jan 1

Transplant Brussels Sprouts seedlings outdoors after Jan 1. Wait until soil temperature reaches 50°F. Space plants at 24/sqft. Harden off plants for a week before moving outside.

Harvest: Apr 1

First harvest approximately Apr 1 (~90 days from transplant). Continue harvesting until first frost (Dec 31).

Fall Planting: Sep 10

For a fall harvest, plant Brussels Sprouts around Sep 10 (16 weeks before first frost).

Companion Planting

✅ Thyme✅ Nasturtiums✅ Onions✅ Garlic

❌ Beans❌ Strawberries

Brussels Sprouts in Other Zones

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Frequently Asked Questions

When should I plant Brussels Sprouts in Zone 11b?

Start Brussels Sprouts seeds indoors around Dec 4. Transplant outdoors after Jan 1. Expect first harvest around Apr 1.

What is the last frost date for Zone 11b?

The average last spring frost date for Zone 11b is Jan 15. The first fall frost averages Dec 31, giving a 350-day growing season.

Can I grow Brussels Sprouts in Zone 11b?

Yes. Brussels Sprouts needs 100 days to harvest. Zone 11b has a 350-day growing season, which is sufficient.

What is the best month to plant Brussels Sprouts in Zone 11b?

The best time to start Brussels Sprouts in Zone 11b is Dec. Begin seeds indoors around Dec 4, then transplant outdoors after the last frost date of Jan 15.

What companion plants grow well with Brussels Sprouts?

Good companion plants for Brussels Sprouts include Thyme, Nasturtiums, Onions, Garlic. Avoid planting Brussels Sprouts near Beans, Strawberries.

How long does Brussels Sprouts take to harvest?

Brussels Sprouts takes approximately 100 days from planting to harvest. In Zone 11b, expect your first harvest around Apr 1.

Plan Your Brussels Sprouts Garden

Track Brussels Sprouts from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

Start Free Brussels Sprouts Growing Guide