When to Plant Hollyhock in Moorpark, California (93021)

Location

Moorpark, California

ZIP Code

93021

USDA Zone

10a

Last Frost

Sunday, January 25, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Sunday, December 14, 2025

Transplant Outdoors

Sunday, February 8, 2026

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

Pro tip: Start Hollyhock seeds indoors 6 weeks before your last frost date, then transplant outdoors around Sunday, February 8, 2026.

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🌿 Plant Details

Scientific Name Alcea rosea

Days to Maturity 365 days

Mature Height 48-96"

Spread 24"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Moderate (1 inch/week)

↔️

Spacing

18" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 10-14 days

Ready to Plant Hollyhock in Moorpark?

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

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🤝 Good Companions

RoseVegetable Garden

🤝

Full Companion Planting Guide for Hollyhock

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

🛠️ Supplies You'll Need

🌱 Seed Starting Trays 🪴 Seed Starting Mix 💡 Grow Lights 🌡️ Heat Mat 🌍 Flower Garden Soil ✂️ Pruning Shears 🚿 Watering Can

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🌾 Seed Saving Guide

🟢 Easy

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Allow seed pods (disc-shaped) to dry on the stalk after petals drop. Harvest when brown and papery.

Processing

Remove seeds from papery rings, spread to dry 1 week before storing.

Seed Viability

Up to 2 years when stored cool, dark, and dry.

Pro Tip

Hollyhocks cross freely with other hollyhock varieties. Expect some color variation in seed-grown plants.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 14 plants of Hollyhock. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Hollyhock in Moorpark, California? +

In Moorpark (Zone 10a), start Hollyhock seeds indoors around Sunday, December 14, 2025 and transplant outdoors around Sunday, February 8, 2026.

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

The average last spring frost date for Moorpark, California (ZIP 93021) is around Sunday, January 25, 2026. This is based on NOAA climate normals for USDA Zone 10a.

How long does Hollyhock take to grow? +

Hollyhock typically matures in about 365 days from transplanting. In Moorpark, that means you can expect harvest around Sunday, February 8, 2026 plus 365 days.

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

Hollyhock should be started indoors 6 weeks before your last frost date. In Moorpark, that means starting around Sunday, December 14, 2025.

📚 More Hollyhock Planting Guides

🗺️

Hollyhock in California

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 10a Hollyhock Guide

All cities in your zone · Avg dates

→

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Growing Hollyhock in Zone 10a

Hollyhock (Alcea rosea) is a popular garden vegetable. In Moorpark, California, which is in USDA Hardiness Zone 10a, you should start seeds indoors around Sunday, December 14, 2025.

Your average last frost date is Sunday, January 25, 2026. Plan to transplant your Hollyhock seedlings outdoors around Sunday, February 8, 2026, about 2 weeks after your last frost date.