When should I plant Swiss Chard in Zone 1b?

Start Swiss Chard seeds indoors around Apr 27. Transplant outdoors after May 11. Expect first harvest around Jun 20.

What is the last frost date for Zone 1b?

The average last spring frost date for Zone 1b is May 25. The first fall frost averages Aug 28, giving a 95-day growing season.

Can I grow Swiss Chard in Zone 1b?

Yes. Swiss Chard needs 55 days to harvest. Zone 1b has a 95-day growing season, which is sufficient.

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🥬 Growing Swiss Chard in Zone 1b

Zone 1b has harsh winters and a short growing season. Start Swiss Chard early indoors to maximize your harvest window. Last frost: May 25. First frost: Aug 28.

Planting Calendar

Indoor

Outdoor

Harvest

Apr 27Aug 28

Season: May 25 – Aug 28 (95 days)

Zone1b

Last FrostMay 25

First FrostAug 28

Season Length95 days

Days to Harvest55

SunPart Sun / Part Shade

Frost ToleranceLight

Spacing4/sqft (6" apart)

When to Plant Swiss Chard in Zone 1b

Start Seeds Indoors: Apr 27

Start Swiss Chard seeds indoors around Apr 27 (4 weeks before last frost). Optimal germination temperature: 75°F. Germinates in 7–14 days.

Transplant Outdoors: May 11

Transplant Swiss Chard seedlings outdoors after May 11. 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 20

First harvest approximately Jun 20 (~40 days from transplant). Continue harvesting until first frost (Aug 28).

Fall Planting: Jul 3

For a fall harvest, plant Swiss Chard around Jul 3 (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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