When to Plant St. John's Wort in Zone 3
In USDA zone 3, start seeds indoors around April 4, transplant or plant outdoors June 13 to October 11, and expect your first harvest around October 11.
St. John's Wort planting calendar for USDA Zone 3
Start seeds indoors
Apr 4
Transplant outdoors
Jun 13
Projected first harvest
Oct 11
St. John's Wort is ready to harvest in about 120 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 st. john's wort
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 st. john's wort need about 120 days to mature.
Varieties to grow
1 variety of st. john's wort in the HomeSown library. Tap any for its full grow guide.
Common problems with st. john's wort
What to watch for, with identification and treatment for each
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