When should I plant Swiss Chard in Zone 3a?

Start Swiss Chard seeds indoors around Apr 24. Transplant outdoors after May 8. Expect first harvest around Jun 17.

What is the last frost date for Zone 3a?

The average last spring frost date for Zone 3a is May 22. The first fall frost averages Sep 12, giving a 113-day growing season.

Can I grow Swiss Chard in Zone 3a?

Yes. Swiss Chard needs 55 days to harvest. Zone 3a has a 113-day growing season, which is sufficient.

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🥬 Growing Swiss Chard in Zone 3a

Zone 3a has harsh winters and a short growing season. Start Swiss Chard early indoors to maximize your harvest window. Last frost: May 22. First frost: Sep 12.

Planting Calendar

Indoor

Outdoor

Harvest

Apr 24Sep 12

Season: May 22 – Sep 12 (113 days)

Zone3a

Last FrostMay 22

First FrostSep 12

Season Length113 days

Days to Harvest55

SunPart Sun / Part Shade

Frost ToleranceLight

Spacing4/sqft (6" apart)

When to Plant Swiss Chard in Zone 3a

Start Seeds Indoors: Apr 24

Start Swiss Chard seeds indoors around Apr 24 (4 weeks before last frost). Optimal germination temperature: 75°F. Germinates in 7–14 days.

Transplant Outdoors: May 8

Transplant Swiss Chard seedlings outdoors after May 8. Wait until soil temperature reaches 50°F. Space plants at 4/sqft (6" apart). Harden off plants for a week before moving outside.

Harvest: Jun 17

First harvest approximately Jun 17 (~40 days from transplant). Continue harvesting until first frost (Sep 12).

Fall Planting: Jul 18

For a fall harvest, plant Swiss Chard around Jul 18 (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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