When to Plant Swiss Chard in Zone 3
In USDA zone 3a, start seeds indoors around April 11, transplant or plant outdoors May 16 to July 15, and expect your first harvest around July 15. Zone 3 also has a fall planting window opening around June 25. (3a shown here — see 3a and 3b dates separately below.)
Swiss Chard planting calendar for USDA Zone 3a
Average last spring frost
May 30
Average first fall frost
September 10
spring planting
Start seeds indoors
Apr 11
Transplant outdoors
May 16
Projected first harvest
Jul 15
fall planting
Direct sow
Jun 25
Projected first harvest
Aug 24
spring planting
fall planting
Most swiss chard mature in about 60 days, needing roughly 103 frost-free days in zone 3a.
Swiss Chard planting calendar for USDA Zone 3b
Average last spring frost
May 20
Average first fall frost
September 15
spring planting
Start seeds indoors
Apr 1
Transplant outdoors
May 6
Projected first harvest
Jul 5
fall planting
Direct sow
Jun 30
Projected first harvest
Aug 29
spring planting
fall planting
Most swiss chard mature in about 60 days, needing roughly 118 frost-free days in zone 3b.
Not sure whether you're in 3a or 3b? 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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