When should I plant Swiss Chard in Zone 9a?

Start Swiss Chard seeds indoors around Feb 20. Transplant outdoors after Mar 6. Expect first harvest around Apr 15.

What is the last frost date for Zone 9a?

The average last spring frost date for Zone 9a is Mar 20. The first fall frost averages Nov 12, giving a 237-day growing season.

Can I grow Swiss Chard in Zone 9a?

Yes. Swiss Chard needs 55 days to harvest. Zone 9a has a 237-day growing season, which is sufficient.

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🥬 Growing Swiss Chard in Zone 9a

Zone 9a has warm winters and an extended growing season — excellent for heat-loving crops like Swiss Chard. Last frost: Mar 20. First frost: Nov 12.

Planting Calendar

Indoor

Outdoor

Harvest

Feb 20Nov 12

Season: Mar 20 – Nov 12 (237 days)

Zone9a

Last FrostMar 20

First FrostNov 12

Season Length237 days

Days to Harvest55

SunPart Sun / Part Shade

Frost ToleranceLight

Spacing4/sqft (6" apart)

When to Plant Swiss Chard in Zone 9a

Start Seeds Indoors: Feb 20

Start Swiss Chard seeds indoors around Feb 20 (4 weeks before last frost). Optimal germination temperature: 75°F. Germinates in 7–14 days.

Transplant Outdoors: Mar 6

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

Harvest: Apr 15

First harvest approximately Apr 15 (~40 days from transplant). Continue harvesting until first frost (Nov 12).

Fall Planting: Sep 17

For a fall harvest, plant Swiss Chard around Sep 17 (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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