When to Plant Shiso in Zone 3
In USDA zone 3a, start seeds indoors around April 18, transplant or plant outdoors June 6 to August 5, and expect your first harvest around August 5. (3a shown here — see 3a and 3b dates separately below.)
Shiso planting calendar for USDA Zone 3a
Average last spring frost
May 30
Average first fall frost
September 10
Start seeds indoors
Apr 18
Transplant outdoors
Jun 6
Projected first harvest
Aug 5
Shiso is ready to harvest in about 60 days, needing roughly 103 frost-free days in zone 3a.
Shiso planting calendar for USDA Zone 3b
Average last spring frost
May 20
Average first fall frost
September 15
Start seeds indoors
Apr 8
Transplant outdoors
May 27
Projected first harvest
Jul 26
Shiso is ready to harvest 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
1 variety of shiso in the HomeSown library. Tap any for its full grow guide.
Common problems with shiso
What to watch for, with identification and treatment for each
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