When to Plant Swiss Chard in Zone 4
In USDA zone 4a, start seeds indoors around March 27, transplant or plant outdoors May 1 to June 30, and expect your first harvest around June 30. Zone 4 also has a fall planting window opening around July 5. (4a shown here — see 4a and 4b dates separately below.)
Swiss Chard planting calendar for USDA Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
spring planting
Start seeds indoors
Mar 27
Transplant outdoors
May 1
Projected first harvest
Jun 30
fall planting
Direct sow
Jul 5
Projected first harvest
Sep 3
spring planting
fall planting
Most swiss chard mature in about 60 days, needing roughly 128 frost-free days in zone 4a.
Swiss Chard planting calendar for USDA Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
spring planting
Start seeds indoors
Mar 22
Transplant outdoors
Apr 26
Projected first harvest
Jun 25
fall planting
Direct sow
Jul 10
Projected first harvest
Sep 8
spring planting
fall planting
Most swiss chard mature in about 60 days, needing roughly 138 frost-free days in zone 4b.
Not sure whether you're in 4a or 4b? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
2 varieties of swiss chard in the HomeSown library. Tap any for its full grow guide.
Common problems with swiss chard
What to watch for, with identification and treatment for each
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