When to Plant Celery in San Diego, California (92154)

Location

San Diego, California

ZIP Code

92154

USDA Zone

10b

Last Frost

Thursday, January 15, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Thursday, November 6, 2025

Transplant Outdoors

Thursday, January 29, 2026

Based on last frost Thursday, January 15, 2026 · Zone 10b

Pro tip: Start Celery seeds indoors 10 weeks before your last frost date, then transplant outdoors around Thursday, January 29, 2026.

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🌿 Plant Details

Scientific Name Apium graveolens

Days to Maturity 130 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 8-28 days

Ready to Plant Celery in San Diego?

Get your seeds now so they're ready by Thursday, November 6, 2025.

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🤝 Good Companions

CosmosDaisySnapDragon

⚠️ Avoid Planting Near

CornAster

🤝

Full Companion Planting Guide for Celery

See which plants help Celery thrive, which to keep away, and raised bed layout tips →

🛠️ 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

Celery is biennial — it seeds in year 2. Harvest umbels just before seeds shatter in summer.

Processing

Cut seed heads into bags, dry 2 weeks, thresh to release seeds.

Seed Viability

Up to 3 years when stored cool, dark, and dry.

Pro Tip

In cold climates, dig celery in fall, store roots in a root cellar, and replant in spring for year-2 flowering.

Frequently Asked Questions

When should I plant Celery in San Diego, California? +

In San Diego (Zone 10b), start Celery seeds indoors around Thursday, November 6, 2025 and transplant outdoors around Thursday, January 29, 2026.

What is the last frost date for San Diego, California? +

The average last spring frost date for San Diego, California (ZIP 92154) is around Thursday, January 15, 2026. This is based on NOAA climate normals for USDA Zone 10b.

How long does Celery take to grow? +

Celery typically matures in about 130 days from transplanting. In San Diego, that means you can expect harvest around Thursday, January 29, 2026 plus 130 days.

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

Celery should be started indoors 10 weeks before your last frost date. In San Diego, that means starting around Thursday, November 6, 2025.

📚 More Celery Planting Guides

🗺️

Celery in California

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 10b Celery Guide

All cities in your zone · Avg dates

→

Other Plants for San Diego

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Growing Celery in Zone 10b

Celery (Apium graveolens) is a popular garden vegetable. In San Diego, California, which is in USDA Hardiness Zone 10b, you should start seeds indoors around Thursday, November 6, 2025.

Your average last frost date is Thursday, January 15, 2026. Plan to transplant your Celery seedlings outdoors around Thursday, January 29, 2026, about 2 weeks after your last frost date.