When to Plant Broccoli Raab in Riverside, California (92521)

Location

Riverside, California

ZIP Code

92521

USDA Zone

10a

Last Frost

Sunday, January 25, 2026

📅 Planting Calendar

Direct Sow Outdoors Sunday, December 14, 2025

Pro Tip: Sow Broccoli Raab directly outdoors 6 weeks before your last frost date.

🌿 Plant Details

Scientific Name Brassica rapa subsp. rapa

Days to Maturity 60 days

Mature Height 12-24"

Spread 8"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

6" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 4-7 days

Ready to Plant Broccoli Raab in Riverside?

Get your seeds now so they're ready by Sunday, December 14, 2025.

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🤝 Good Companions

OnionBeetCelery

⚠️ Avoid Planting Near

TomatoPepperStrawberry

Other Plants for Riverside

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Growing Broccoli Raab in Zone 10a

Broccoli Raab (Brassica rapa subsp. rapa) is a popular garden vegetable. In Riverside, California, which is in USDA Hardiness Zone 10a, you should direct sow seeds around Sunday, December 14, 2025.

Your average last frost date is Sunday, January 25, 2026. Broccoli Raab grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.