When to Plant Brussels Sprout in Berkeley, California (94708)

Location

Berkeley, California

ZIP Code

94708

USDA Zone

10a

Last Frost

Sunday, January 25, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Sunday, November 2, 2025

Transplant Outdoors

Sunday, January 25, 2026

Based on last frost Sunday, January 25, 2026 · Zone 10a

Pro tip: Start Brussels Sprout seeds indoors 12 weeks before your last frost date, then transplant outdoors around Sunday, January 25, 2026.

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🌿 Plant Details

Scientific Name Brassica oleracea var. gemmifera

Days to Maturity 84 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 1-7 days

Ready to Plant Brussels Sprout in Berkeley?

Get your seeds now so they're ready by Sunday, November 2, 2025.

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🛠️ Supplies You'll Need

🌱 Seed Starting Trays 🪴 Seed Starting Mix 💡 Grow Lights 🌡️ Heat Mat 🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

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🌾 Seed Saving Guide

🔴 Difficult

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Allow some sprouts to open into flowers. Harvest seed pods in summer/fall when dry.

Processing

Thresh dry pods, winnow to separate seeds from chaff.

Seed Viability

Up to 5 years when stored cool, dark, and dry.

Pro Tip

B. oleracea — crosses freely with other cole crops. Biennial nature makes isolation especially challenging.

Frequently Asked Questions

When should I plant Brussels Sprout in Berkeley, California? +

In Berkeley (Zone 10a), start Brussels Sprout seeds indoors around Sunday, November 2, 2025 and transplant outdoors around Sunday, January 25, 2026.

What is the last frost date for Berkeley, California? +

The average last spring frost date for Berkeley, California (ZIP 94708) is around Sunday, January 25, 2026. This is based on NOAA climate normals for USDA Zone 10a.

How long does Brussels Sprout take to grow? +

Brussels Sprout typically matures in about 84 days from transplanting. In Berkeley, that means you can expect harvest around Sunday, January 25, 2026 plus 84 days.

Should I start Brussels Sprout indoors or direct sow in California? +

Brussels Sprout should be started indoors 12 weeks before your last frost date. In Berkeley, that means starting around Sunday, November 2, 2025.

📚 More Brussels Sprout Planting Guides

🗺️

Brussels Sprout in California

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 10a Brussels Sprout Guide

All cities in your zone · Avg dates

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Growing Brussels Sprout in Zone 10a

Brussels Sprout (Brassica oleracea var. gemmifera) is a popular garden vegetable. In Berkeley, California, which is in USDA Hardiness Zone 10a, you should start seeds indoors around Sunday, November 2, 2025.

Your average last frost date is Sunday, January 25, 2026. Plan to transplant your Brussels Sprout seedlings outdoors around Sunday, January 25, 2026, about 0 weeks after your last frost date.