When to Plant St. John's Wort in Zone 6
In USDA zone 6a, start seeds indoors around February 28, transplant or plant outdoors May 9 to September 6, and expect your first harvest around September 6. (6a shown here — see 6a and 6b dates separately below.)
St. John's Wort planting calendar for USDA Zone 6a
Average last spring frost
April 25
Average first fall frost
October 10
Start seeds indoors
Feb 28
Transplant outdoors
May 9
Projected first harvest
Sep 6
St. John's Wort is ready to harvest in about 120 days, needing roughly 168 frost-free days in zone 6a.
St. John's Wort planting calendar for USDA Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
Start seeds indoors
Feb 23
Transplant outdoors
May 4
Projected first harvest
Sep 1
St. John's Wort is ready to harvest in about 120 days, needing roughly 178 frost-free days in zone 6b.
Not sure whether you're in 6a or 6b? Set your ZIP in HomeSown for dates tuned to your exact location.
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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