When should I plant Squash in Zone 10a?

Start Squash seeds indoors around Jan 23. Transplant outdoors after Mar 6. Expect first harvest around Apr 20.

What is the last frost date for Zone 10a?

The average last spring frost date for Zone 10a is Feb 20. The first fall frost averages Dec 1, giving a 284-day growing season.

Can I grow Squash in Zone 10a?

Yes. Squash needs 55 days to harvest. Zone 10a has a 284-day growing season, which is sufficient. You can plant up to 10 successions.

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🟡 Growing Squash in Zone 10a

Zone 10a has a year-round growing season. Squash can be planted almost any time with proper planning. Last frost: Feb 20. First frost: Dec 1.

Planting Calendar

Indoor

Outdoor

Harvest

Jan 23Dec 1

Season: Feb 20 – Dec 1 (284 days) · Succession: plant every 3 weeks (up to 10x)

Zone10a

Last FrostFeb 20

First FrostDec 1

Season Length284 days

Days to Harvest55

SunFull Sun

Frost ToleranceNone

Spacing1/sqft (12" apart)

When to Plant Squash in Zone 10a

Start Seeds Indoors: Jan 23

Start Squash seeds indoors around Jan 23 (4 weeks before last frost). Optimal germination temperature: 85°F. Germinates in 4–10 days.

Transplant Outdoors: Mar 6

Transplant Squash seedlings outdoors after Mar 6. Wait until soil temperature reaches 65°F. Space plants at 1/sqft (12" apart). Harden off plants for a week before moving outside.

Harvest: Apr 20

First harvest approximately Apr 20 (~45 days from transplant). Continue harvesting until first frost (Dec 1).

Squash 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

Plan Your Squash Garden

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

Start Free Squash Growing Guide