When to Plant Comfrey in Zone 6
In USDA zone 6a, plant outdoors April 25 to June 24, and expect your first harvest around June 24. (6a shown here — see 6a and 6b dates separately below.)
Comfrey planting calendar for USDA Zone 6a
Average last spring frost
April 25
Average first fall frost
October 10
Direct sow
Apr 25
Projected first harvest
Jun 24
Comfrey is ready to harvest in about 60 days, needing roughly 168 frost-free days in zone 6a.
Comfrey planting calendar for USDA Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
Direct sow
Apr 20
Projected first harvest
Jun 19
Comfrey is ready to harvest in about 60 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 comfrey in the HomeSown library. Tap any for its full grow guide.
Common problems with comfrey
What to watch for, with identification and treatment for each
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