When should I plant Swiss Chard in Zone 6b?

Start Swiss Chard seeds indoors around Mar 18. Transplant outdoors after Apr 1. Expect first harvest around May 11.

What is the last frost date for Zone 6b?

The average last spring frost date for Zone 6b is Apr 15. The first fall frost averages Oct 22, giving a 190-day growing season.

Can I grow Swiss Chard in Zone 6b?

Yes. Swiss Chard needs 55 days to harvest. Zone 6b has a 190-day growing season, which is sufficient.

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🥬 Growing Swiss Chard in Zone 6b

Zone 6b has mild winters and a long growing season — good conditions for Swiss Chard. Last frost: Apr 15. First frost: Oct 22.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 18Oct 22

Season: Apr 15 – Oct 22 (190 days)

Zone6b

Last FrostApr 15

First FrostOct 22

Season Length190 days

Days to Harvest55

SunPart Sun / Part Shade

Frost ToleranceLight

Spacing4/sqft (6" apart)

When to Plant Swiss Chard in Zone 6b

Start Seeds Indoors: Mar 18

Start Swiss Chard seeds indoors around Mar 18 (4 weeks before last frost). Optimal germination temperature: 75°F. Germinates in 7–14 days.

Transplant Outdoors: Apr 1

Transplant Swiss Chard seedlings outdoors after Apr 1. Wait until soil temperature reaches 50°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: May 11

First harvest approximately May 11 (~40 days from transplant). Continue harvesting until first frost (Oct 22).

Fall Planting: Aug 27

For a fall harvest, plant Swiss Chard around Aug 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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