When to Plant Shiso in Zone 9
In USDA zone 9a, start seeds indoors around January 18, transplant or plant outdoors March 8 to May 7, and expect your first harvest around May 7. (9a shown here — see 9a and 9b dates separately below.)
Shiso planting calendar for USDA Zone 9a
Average last spring frost
March 1
Average first fall frost
December 1
Start seeds indoors
Jan 18
Transplant outdoors
Mar 8
Projected first harvest
May 7
Shiso is ready to harvest in about 60 days, needing roughly 275 frost-free days in zone 9a.
Shiso planting calendar for USDA Zone 9b
Average last spring frost
February 15
Average first fall frost
December 15
Start seeds indoors
Jan 4
Transplant outdoors
Feb 22
Projected first harvest
Apr 23
Shiso is ready to harvest in about 60 days, needing roughly 303 frost-free days in zone 9b.
Not sure whether you're in 9a or 9b? 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
🌱 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 →