When to Plant Comfrey in Zone 5
In USDA zone 5a, plant outdoors May 5 to July 4, and expect your first harvest around July 4. (5a shown here — see 5a and 5b dates separately below.)
Comfrey planting calendar for USDA Zone 5a
Average last spring frost
May 5
Average first fall frost
October 1
Direct sow
May 5
Projected first harvest
Jul 4
Comfrey is ready to harvest in about 60 days, needing roughly 149 frost-free days in zone 5a.
Comfrey planting calendar for USDA Zone 5b
Average last spring frost
April 30
Average first fall frost
October 5
Direct sow
Apr 30
Projected first harvest
Jun 29
Comfrey is ready to harvest in about 60 days, needing roughly 158 frost-free days in zone 5b.
Not sure whether you're in 5a or 5b? 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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