Growing Brussels Sprouts in Zone 11a

Zone 11a has a year-round growing season. Brussels Sprouts can be planted almost any time with proper planning. Last frost: Jan 28. First frost: Dec 22.

Planting Calendar

Indoor

Outdoor

Harvest

Dec 17Dec 22

Season: Jan 28 – Dec 22 (328 days)

Zone11a

Last FrostJan 28

First FrostDec 22

Season Length328 days

Days to Harvest100

SunFull Sun

Frost ToleranceModerate

Spacing24/sqft

When to Plant Brussels Sprouts in Zone 11a

Start Seeds Indoors: Dec 17

Start Brussels Sprouts seeds indoors around Dec 17 (6 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 5–10 days.

Transplant Outdoors: Jan 14

Transplant Brussels Sprouts seedlings outdoors after Jan 14. Wait until soil temperature reaches 50°F. Space plants at 24/sqft. Harden off plants for a week before moving outside.

Harvest: Apr 14

First harvest approximately Apr 14 (~90 days from transplant). Continue harvesting until first frost (Dec 22).

Fall Planting: Sep 1

For a fall harvest, plant Brussels Sprouts around Sep 1 (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 11a?

Start Brussels Sprouts seeds indoors around Dec 17. Transplant outdoors after Jan 14. Expect first harvest around Apr 14.

What is the last frost date for Zone 11a?

The average last spring frost date for Zone 11a is Jan 28. The first fall frost averages Dec 22, giving a 328-day growing season.

Can I grow Brussels Sprouts in Zone 11a?

Yes. Brussels Sprouts needs 100 days to harvest. Zone 11a has a 328-day growing season, which is sufficient.

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

The best time to start Brussels Sprouts in Zone 11a is Dec. Begin seeds indoors around Dec 17, then transplant outdoors after the last frost date of Jan 28.

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 11a, expect your first harvest around Apr 14.

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