When to Plant Turnip in Riverside, California (92513)

Location

Riverside, California

ZIP Code

92513

USDA Zone

10a

Last Frost

Sunday, January 25, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Sunday, December 14, 2025

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

Pro tip: Sow Turnip directly outdoors 6 weeks before your last frost date.

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🌿 Plant Details

Scientific Name Brassica rapa

Days to Maturity 91 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 1-7 days

Ready to Plant Turnip in Riverside?

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

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🛠️ Supplies You'll Need

🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

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🌾 Seed Saving Guide

🟡 Moderate

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Biennial — allow roots to overwinter and harvest seed pods in year 2 when dry.

Processing

Thresh dried stalks, winnow seeds from pod fragments.

Seed Viability

Up to 4 years when stored cool, dark, and dry.

Pro Tip

Brassica rapa — crosses with bok choy, napa cabbage, and other rapa crops. Isolate by 300 feet.

Frequently Asked Questions

When should I plant Turnip in Riverside, California? +

In Riverside (Zone 10a), direct sow Turnip outdoors around Sunday, December 14, 2025.

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

The average last spring frost date for Riverside, California (ZIP 92513) is around Sunday, January 25, 2026. This is based on NOAA climate normals for USDA Zone 10a.

How long does Turnip take to grow? +

Turnip typically matures in about 91 days from direct sowing. In Riverside, that means you can expect harvest around Sunday, December 14, 2025 plus 91 days.

Should I start Turnip indoors or direct sow in California? +

Turnip does best when direct sown outdoors. In Riverside, sow directly around Sunday, December 14, 2025.

📚 More Turnip Planting Guides

🗺️

Turnip in California

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 10a Turnip Guide

All cities in your zone · Avg dates

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Growing Turnip in Zone 10a

Turnip (Brassica 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. Turnip grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.