When to Plant Shiso in Zone 3
In USDA zone 3, start seeds indoors around April 18, transplant or plant outdoors June 6 to August 5, and expect your first harvest around August 5.
Shiso planting calendar for USDA Zone 3
Start seeds indoors
Apr 18
Transplant outdoors
Jun 6
Projected first harvest
Aug 5
Shiso is ready to harvest in about 60 days. Dates use USDA zone 3a average frost dates. Set your ZIP in HomeSown for dates tuned to your exact location.
What zone 3 means for shiso
Average last spring frost
May 30
Average first fall frost
September 10
Those two dates are what set the schedule above. Zone 3 gives you roughly 103 frost-free days, and shiso need about 60 days to mature.
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
🌱 Grow shiso with a calendar built for your exact yard
HomeSown turns your ZIP code into a personalized planting calendar, watering reminders, and pest help. Free to start.
Start your free garden →