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🥒 Growing Zucchini in Zone 10b

Zone 10b has a year-round growing season. Zucchini can be planted almost any time with proper planning. Last frost: Jan 28. First frost: Dec 22.

Planting Calendar

Indoor

Outdoor

Harvest

Dec 31Dec 22

Season: Jan 28 – Dec 22 (328 days) · Succession: plant every 3 weeks (up to 13x)

Zone10b

Last FrostJan 28

First FrostDec 22

Season Length328 days

Days to Harvest50

SunFull Sun

Frost ToleranceNone

Spacing1/sqft (12" apart)

When to Plant Zucchini in Zone 10b

Start Seeds Indoors: Dec 31

Start Zucchini seeds indoors around Dec 31 (4 weeks before last frost). Optimal germination temperature: 85°F. Germinates in 4–10 days.

Transplant Outdoors: Feb 11

Transplant Zucchini seedlings outdoors after Feb 11. Wait until soil temperature reaches 65°F. Space plants at 1/sqft (12" apart). Harden off plants for a week before moving outside.

Harvest: Mar 18

First harvest approximately Mar 18 (~35 days from transplant). Continue harvesting until first frost (Dec 22).

Fall Planting: Oct 13

For a fall harvest, plant Zucchini around Oct 13 (10 weeks before first frost).

Companion Planting

✅ Corn✅ Beans✅ Nasturtiums✅ Phacelia

❌ Potatoes

Zucchini in Other Zones

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Frequently Asked Questions

When should I plant Zucchini in Zone 10b?

Start Zucchini seeds indoors around Dec 31. Transplant outdoors after Feb 11. Expect first harvest around Mar 18.

What is the last frost date for Zone 10b?

The average last spring frost date for Zone 10b is Jan 28. The first fall frost averages Dec 22, giving a 328-day growing season.

Can I grow Zucchini in Zone 10b?

Yes. Zucchini needs 50 days to harvest. Zone 10b has a 328-day growing season, which is sufficient. You can plant up to 13 successions.

What is the best month to plant Zucchini in Zone 10b?

The best time to start Zucchini in Zone 10b is Dec. Begin seeds indoors around Dec 31, then transplant outdoors after the last frost date of Jan 28.

What companion plants grow well with Zucchini?

Good companion plants for Zucchini include Corn, Beans, Nasturtiums, Phacelia. Avoid planting Zucchini near Potatoes.

How long does Zucchini take to harvest?

Zucchini takes approximately 50 days from planting to harvest. In Zone 10b, expect your first harvest around Mar 18.

Plan Your Zucchini Garden

Track Zucchini from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

Start Free Zucchini Growing Guide