When to Plant Leaf Lettuce in Simi Valley, California (93063)

Location

Simi Valley, California

ZIP Code

93063

USDA Zone

10a

Last Frost

Sunday, January 25, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Sunday, December 28, 2025

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

Pro tip: Sow Leaf Lettuce directly outdoors 4 weeks before your last frost date.

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🌿 Plant Details

Scientific Name Lactuca sativa

Days to Maturity 45 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 1-7 days

Ready to Plant Leaf Lettuce in Simi Valley?

Get your seeds now so they're ready by Sunday, December 28, 2025.

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🛠️ Supplies You'll Need

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

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Common Leaf Lettuce Varieties

Popular cultivars to look for at your local nursery or seed supplier.

Black Seeded Simpson

loose-leaf 45d

Fast-growing heirloom loose-leaf lettuce; one of the most heat-tolerant green lettuces.

Red Sails

loose-leaf 45d

Frilly, burgundy-tinged loose leaf with mild flavor and good heat tolerance.

Oak Leaf

loose-leaf 50d

Deeply lobed, oak-shaped leaves with sweet, mild flavor; very slow to bolt.

Salad Bowl

loose-leaf 45d

All-America Selections winner; frilly bowl-shaped plant with excellent heat tolerance.

🌾 Seed Saving Guide

🟢 Easy

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Let plants bolt fully. Harvest seed heads daily as they ripen — they shatter quickly.

Processing

Shake ripe seed heads into a bag each day, dry seeds 1 week before storing.

Seed Viability

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

Pro Tip

Bag flowers of different varieties to prevent crossing, or isolate by 25 feet.

Frequently Asked Questions

When should I plant Leaf Lettuce in Simi Valley, California? +

In Simi Valley (Zone 10a), direct sow Leaf Lettuce outdoors around Sunday, December 28, 2025.

What is the last frost date for Simi Valley, California? +

The average last spring frost date for Simi Valley, California (ZIP 93063) is around Sunday, January 25, 2026. This is based on NOAA climate normals for USDA Zone 10a.

How long does Leaf Lettuce take to grow? +

Leaf Lettuce typically matures in about 45 days from direct sowing. In Simi Valley, that means you can expect harvest around Sunday, December 28, 2025 plus 45 days.

Should I start Leaf Lettuce indoors or direct sow in California? +

Leaf Lettuce does best when direct sown outdoors. In Simi Valley, sow directly around Sunday, December 28, 2025.

📚 More Leaf Lettuce Planting Guides

🗺️

Leaf Lettuce in California

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 10a Leaf Lettuce Guide

All cities in your zone · Avg dates

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Other Plants for Simi Valley

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Growing Leaf Lettuce in Zone 10a

Leaf Lettuce (Lactuca sativa) is a popular garden vegetable. In Simi Valley, California, which is in USDA Hardiness Zone 10a, you should direct sow seeds around Sunday, December 28, 2025.

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