When should I plant Swiss Chard in Zone 6a?

Start Swiss Chard seeds indoors around Mar 31. Transplant outdoors after Apr 14. Expect first harvest around May 24.

What is the last frost date for Zone 6a?

The average last spring frost date for Zone 6a is Apr 28. The first fall frost averages Oct 8, giving a 163-day growing season.

Can I grow Swiss Chard in Zone 6a?

Yes. Swiss Chard needs 55 days to harvest. Zone 6a has a 163-day growing season, which is sufficient.

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🥬 Growing Swiss Chard in Zone 6a

Zone 6a has mild winters and a long growing season — good conditions for Swiss Chard. Last frost: Apr 28. First frost: Oct 8.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 31Oct 8

Season: Apr 28 – Oct 8 (163 days)

Zone6a

Last FrostApr 28

First FrostOct 8

Season Length163 days

Days to Harvest55

SunPart Sun / Part Shade

Frost ToleranceLight

Spacing4/sqft (6" apart)

When to Plant Swiss Chard in Zone 6a

Start Seeds Indoors: Mar 31

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

Transplant Outdoors: Apr 14

Transplant Swiss Chard seedlings outdoors after Apr 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: May 24

First harvest approximately May 24 (~40 days from transplant). Continue harvesting until first frost (Oct 8).

Fall Planting: Aug 13

For a fall harvest, plant Swiss Chard around Aug 13 (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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