When to Plant Squash in Simi Valley, California (93065)

Location

Simi Valley, California

ZIP Code

93065

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 Squash directly outdoors 6 weeks before your last frost date.

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🌿 Plant Details

Scientific Name Cucurbita moschata

Days to Maturity 90 days

Mature Height 24-36"

Spread 72"

Type Vine

Fruit Size Large (2-5 lbs)

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1 inch/week)

↔️

Spacing

48" apart

🌱

Planting Depth

1" deep

Seeds typically germinate in 7-14 days

Ready to Plant Squash in Simi Valley?

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

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🤝 Good Companions

CornBeanRadishMarigold

⚠️ Avoid Planting Near

Potato

🤝

Full Companion Planting Guide for Squash

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

🛠️ Supplies You'll Need

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

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Common Squash Varieties

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

Butternut

winter 110d

Tan, pear-shaped winter squash with sweet, orange flesh; the most popular for soups.

Acorn

winter 80d

Small, dark green ribbed squash with dense, mild flesh; ideal for stuffing and baking halves.

Delicata

winter 100d

Striped cream-and-green oblong squash with very sweet, fine-grained flesh; edible skin.

Spaghetti Squash

winter 100d

Pale yellow squash whose cooked flesh pulls into spaghetti-like strands; low-carb pasta substitute.

Hubbard

winter 100d

Large, knobby, blue-gray heirloom winter squash with sweet, dense orange flesh.

🌾 Seed Saving Guide

🟡 Moderate

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Allow squash to fully mature and cure for 1 month before extracting seeds.

Processing

Scoop seeds, wash off flesh, dry flat for 2 weeks.

Seed Viability

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

Pro Tip

Squash cross within the same species. Hand-pollinate early in the morning for guaranteed purity.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 2 plants of Squash. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Squash in Simi Valley, California? +

In Simi Valley (Zone 10a), direct sow Squash outdoors around Sunday, December 14, 2025.

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

The average last spring frost date for Simi Valley, California (ZIP 93065) is around Sunday, January 25, 2026. This is based on NOAA climate normals for USDA Zone 10a.

How long does Squash take to grow? +

Squash typically matures in about 90 days from direct sowing. In Simi Valley, that means you can expect harvest around Sunday, December 14, 2025 plus 90 days.

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

Squash does best when direct sown outdoors. In Simi Valley, sow directly around Sunday, December 14, 2025.

📚 More Squash Planting Guides

🗺️

Squash in California

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 10a Squash Guide

All cities in your zone · Avg dates

→

Other Plants for Simi Valley

Blackberry Blueberry Raspberry Strawberry Basil Chamomile Chives Cilantro Dill Lavender Lemon Balm Marjoram Mint Oregano Parsley Rosemary Sage Tarragon Thyme Acorn Squash Artichoke Arugula Asparagus Beefsteak Tomato Beet Bell Pepper Bok Choy Broccoli Brussels Sprout Butternut Squash Cabbage Cantaloupe Carrot Cauliflower Cayenne Pepper Celery Cherry Tomato Chili Pepper Collard Green Common Bean Cucumber Eggplant Endive Fennel Garlic Grape Tomato Green Bean Habanero Pepper Head Lettuce Heirloom Tomato Honeydew Melon Jalapeño Pepper Kale Kohlrabi Leaf Lettuce Leek Lima Bean Mustard Okra Onion Parsnip Pea Poblano Pepper Pole Pea Potato Pumpkin Radicchio Radish Rhubarb Roma Tomato Rutabaga Serrano Pepper Shallot Snap Pea Snow Pea Spaghetti Squash Spinach Sweet Corn Sweet Potato Swiss Chard Tomato Turnip Watermelon Zucchini Sunflower Marigold Zinnia Nasturtium Cosmos Echinacea (Coneflower) Petunia Black-eyed Susan Apple Tree Pear Tree Peach Tree Plum Tree Sweet Cherry Tree Lemon Tree Borage Lemongrass Ginger Stevia Tomatillo Edamame Fava Bean Mâche Mizuna Sorrel Shishito Pepper Banana Pepper Watermelon Radish Napa Cabbage Popcorn Broccoli Raab Catnip Valerian Lemon Verbena Bee Balm Anise Lovage Chervil Summer Savory Dahlia Snapdragon Pansy Sweet Pea Morning Glory Hollyhock Larkspur Bachelor Button Columbine Impatiens Salvia (Annual) Sweet Alyssum Celosia Lupine Verbena Elderberry Grape Vine Red Currant Gooseberry Serviceberry Fig Tree Avocado Tree Persimmon Tree Olive Tree

Growing Squash in Zone 10a

Squash (Cucurbita moschata) is a popular garden vegetable. In Simi Valley, 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. Squash grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.