When should I plant Swiss Chard in Zone 10b?

Start Swiss Chard seeds indoors around Dec 31. Transplant outdoors after Jan 14. Expect first harvest around Feb 23.

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 Swiss Chard in Zone 10b?

Yes. Swiss Chard needs 55 days to harvest. Zone 10b has a 328-day growing season, which is sufficient.

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🥬 Growing Swiss Chard in Zone 10b

Zone 10b has a year-round growing season. Swiss Chard 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)

Zone10b

Last FrostJan 28

First FrostDec 22

Season Length328 days

Days to Harvest55

SunPart Sun / Part Shade

Frost ToleranceLight

Spacing4/sqft (6" apart)

When to Plant Swiss Chard in Zone 10b

Start Seeds Indoors: Dec 31

Start Swiss Chard seeds indoors around Dec 31 (4 weeks before last frost). Optimal germination temperature: 75°F. Germinates in 7–14 days.

Transplant Outdoors: Jan 14

Transplant Swiss Chard seedlings outdoors after Jan 14. Wait until soil temperature reaches 50°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: Feb 23

First harvest approximately Feb 23 (~40 days from transplant). Continue harvesting until first frost (Dec 22).

Fall Planting: Oct 27

For a fall harvest, plant Swiss Chard around Oct 27 (8 weeks before first frost).

Swiss Chard 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

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