Local Growing Guide

Grow Summer/Winter Squash in San Diego, CA

Your local guide to growing summer/winter squash in San Diego — zone-specific timing, local tips, and care advice.

Spring 📍 San Diego 🌡️ Zone 10a

Days to Harvest

50–100

Spacing

24–36"

Method

Both

Season

Spring

When to Plant Summer/Winter Squash in San Diego

San Diego sits in USDA Zone 10a. Here are your local planting windows.

🏠

Start Indoors

Mar 10 – Apr 10

🌱

Transplant Outdoors

Mar 20 – May 10

🌿

Direct Sow

Mar – Jul

Growing Summer/Winter Squash in San Diego

📋 Key Timing

Summer squash (50–60 days) vs winter squash (80–100 days). Squash bugs are the main threat.

Start your summer/winter squash seeds indoors during Mar 10 – Apr 10. Move seedlings to the garden between Mar 20 – May 10. Sow seeds directly in your San Diego garden between Mar – Jul.

Watch for These Pests in San Diego

squash bugs squash vine borer powdery mildew

Frequently Asked Questions

Can I grow Summer/Winter Squash in San Diego?

Yes! Summer/Winter Squash grows well in San Diego's Zone 10a climate. Summer squash (50–60 days) vs winter squash (80–100 days). Squash bugs are the main threat.

When to plant Summer/Winter Squash in San Diego?

Transplant summer/winter squash outdoors between Mar 20 – May 10 for best results in San Diego.

Does Summer/Winter Squash need shade in San Diego?

Summer/Winter Squash generally handles San Diego's climate well without shade cloth, though afternoon shade can help during heat waves.

More Growing Guides

Full Summer/Winter Squash growing guide · Zone 10 planting dates · All plants for San Diego