Comfrey Growing Guide
Growing Comfrey is easier than you think. This guide walks you through everything you need — from planting your first seed to harvesting.
At a Glance
Difficulty
Easy
Category
Herb
Sun Exposure
Full Sun
Frost Tolerance
Frost Hardy
Cold Hardiness
Survives to -34°C
Plant Family
Boraginaceae
Growing Season
Warm Season
Plant Lifecycle
Perennial
Also grows well as
How to Start It
★ Recommended for beginners
Cut a finger-length piece of root, lay it a few cm deep, and water — it'll sprout within weeks. One plant gives you dozens of cuttings.
The common garden type ('Bocking 14') is sterile and won't spread by seed — which is exactly what you want, since seeding comfrey can become a thug. Plant it where you want it for good, because any root left behind regrows.
When To Start
First Chance to Plant
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Last Chance to Plant
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When should you plant Comfrey?
Your planting dates depend on your local climate. Sign up and add your location to unlock personalized dates.
Your Comfrey Planting Window
Start planting
May 15, 2026
Last chance
Sep 10, 2026
The Journey Ahead
Comfrey's Lifecycle
Seedling
Mature Plant
Seed Production
Step 1
Prepare Your Space
90 cm
Plant Spacing
120 cm
Row Spacing
Vertical Growing
No.
Succession Planting
No.
Good Companions
Bad Companions
Step 2
Planting & Sprouting
Growing Tips
- 1Comfrey is a permaculture workhorse: its deep roots mine nutrients that its leaves return to your garden as mulch or feed.
- 2Plant the sterile Bocking 14 type somewhere permanent in full sun, and cut it hard several times a year.
Seedling Phase
Step 3
Growth & Maturity
90 cm
Mature Height
90 cm
Mature Width
Pests to Watch For
Diseases to Watch For
Mature Plant
Step 4
Harvesting
When to Pick
Cut leaves 2–4 times a season for mulch, compost or liquid feed
How to Harvest
- 1Chop the big leaves down to about 5 cm above the crown — wear gloves, as the bristly leaves can irritate skin.
- 2It'll regrow several times a season.
- 3Pile the leaves on as mulch, in the compost, or steep them for a free liquid feed.
Step 5
Saving Seeds
Seed Production
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