DibbleWhen to plant Swiss chard in Zone 6
In Zone 6, the last spring frost usually passes around April 21 and the first fall frost arrives around October 17, leaving about 179 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.
Generous season. Spring and fall plantings both productive.
Planting windows for Swiss chard in Zone 6
| Task | Window |
|---|---|
| Direct sow | Apr 7 to Apr 21 |
| Estimated harvest | Jun 1 to Sep 29 |
The harvest estimate counts 55 days to maturity, then a picking window of about 120 days. These windows use typical frost dates for Zone 6; Dibble pins them to your exact ZIP code.
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Swiss Chard in a Zone 6 season
Zone 6 gives about 179 frost-free days. Swiss Chard needs roughly 55 days from sowing. That leaves about 124 days of slack, so there is room for a late start or a second planting.
How to grow Swiss chard
Sow chard a couple of weeks before last frost. Pick outer leaves and it keeps producing from spring through fall.
Companion plants
Good neighbors for Swiss Chard:
Swiss Chard in other zones
Not in Zone 6? Pick your zone for the same dated windows.
Keep exploring
Swiss Chard: the full growing guide · The Zone 6 planting calendar · Every crop and zone
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Dates are estimates based on typical frost dates for the zone. Your yard has its own microclimate, so use them as a starting point and adjust as you learn your space.