Common Comfrey

Symphytum officinale

Native to:
Austria, Belarus, Belgium, Bulgaria, Czechia-Slovakia, France, Germany, Great Britain, Hungary, Italy, Kazakhstan, Krym, Netherlands, North Caucasus, NW. Balkan Pen., Poland, Romania, Russia, Sardegna, Sicilia, Spain, Switzerland, Türkiye, Türkiye-in-Europe, Ukraine

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Boraginaceae
Genus:
Symphytum
Species:
Symphytum officinale
USDA Symbol:
SYOF

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Forb/herb
Height:
120 cm
Light Requirements:
Full Sun
Drought Tolerance:
Low
Bloom Months:
may,jun,jul
Bloom Colors:
purple, pink, white

Host Plant for Caterpillars

kidney-spotted minor (Lacinipolia renigera)

Reported Fauna Sightings

Bees: American bumble bee (Bombus pensylvanicus), Common eastern bumble bee (Bombus impatiens), Fuzzy-horned bumble (Bombus mixtus), Yellow head bumble bee (Bombus flavifrons)

Garden & Ecology Notes

Wildlife Value:
bees, butterflies
Deer Resistant:
Yes

Soil Requirements

Soil Type:
rich, moisture-retentive loamy soil
pH:
5.0 - 7.0 (slightly acidic to neutral)
Drainage:
tolerates poor drainage
Moisture:
consistently moist
Notes:
prefers damp meadows and riverbanks

Propagation & Germination

Stratification:
Cold/moist stratification required — 30–60 days
Germination Time:
14–28 days
Notes:
Seeds germinate best after cold stratification; sow in fall or stratify for 4-8 weeks.

ORGHPS Germination Guide: Sow @ 20C. If no germination in 3 months, try 4C 1-2 months, then 20C again.

Source: Ontario Rock Garden & Hardy Plant Society