When should I plant Tomato, San Marzano in Zone 10b?

Start Tomato, San Marzano seeds indoors around Dec 17. Transplant outdoors after Feb 11. Expect first harvest around Apr 17.

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 Tomato, San Marzano in Zone 10b?

Yes. Tomato, San Marzano needs 80 days to harvest. Zone 10b has a 328-day growing season, which is sufficient.

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🍅 Growing Tomato, San Marzano in Zone 10b

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

Planting Calendar

Indoor

Outdoor

Harvest

Dec 17Dec 22

Season: Jan 28 – Dec 22 (328 days)

Zone10b

Last FrostJan 28

First FrostDec 22

Season Length328 days

Days to Harvest80

SunFull Sun

Frost ToleranceNone

Spacing1/sqft (12" apart)

When to Plant Tomato, San Marzano in Zone 10b

Start Seeds Indoors: Dec 17

Start Tomato, San Marzano seeds indoors around Dec 17 (6 weeks before last frost). Optimal germination temperature: 80°F. Germinates in 6–14 days.

Transplant Outdoors: Feb 11

Transplant Tomato, San Marzano seedlings outdoors after Feb 11. Wait until soil temperature reaches 60°F. Space plants at 1/sqft (12" apart). Harden off plants for a week before moving outside.

Harvest: Apr 17

First harvest approximately Apr 17 (~65 days from transplant). Continue harvesting until first frost (Dec 22).

Companion Planting

✅ Garlic✅ Asparagus✅ Basil✅ Carrots✅ Marigolds✅ Peppers✅ Onions

❌ Potatoes❌ Fennel❌ Corn❌ Kohlrabi

Tomato, San Marzano 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 Tomato, San Marzano Garden

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

Start Free Tomato, San Marzano Growing Guide