Comfrey Plant Care
Symphytum officinale L.
Symphytum officinale is a perennial flowering plant in the family Boraginaceae. Along with thirty four other species of Symphytum, it is known as comfrey.
Every 4–7 days
Partial shade to full sun
50–75°F
40–70%
What Is the Comfrey?
Comfrey (Symphytum officinale) belongs to the Boraginaceae family within the Symphytum genus. Comfrey is also known as Common Comfrey, True Comfrey, Blackwort.
Comfrey displays a clumping herbaceous perennial growth habit, reaching up to 2 inches tall with a spread of approximately 1.5 inches. Comfrey produces bell-shaped flowers in shades of blue, pink, or white.
Leaf size: approximately 6 inches.
How Often Should You Water a Comfrey?
Symphytum officinale requires watering every 4–7 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 4–7 days
Let soil partially dry between waterings
What Light Does the Comfrey Need?
Comfrey thrives in partial shade to full sun light conditions. The optimal light range is 100–200 lux. Avoid placing Comfrey in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Partial shade to full sun
100–200 lux
What Temperature and Humidity Does the Comfrey Prefer?
Symphytum officinale grows best at temperatures between 50°F and 75°F. Comfrey prefers humidity levels of 40–70%.
Temperature
50–75°F
Humidity
40–70%
What Soil Mix Works Best for a Comfrey?
Moist, well-draining soil rich in organic matter. Good drainage is essential for Comfrey to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Comfrey?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Comfrey?
Comfrey can be propagated through division, seeds.
Fertilizing
Every 6 months
During the growing season
Is the Comfrey Toxic to Pets and Children?
Toxic to Pets & Children
Toxic to humans and pets if ingested
What Pests and Diseases Affect the Comfrey?
Comfrey is susceptible to aphids, spider mites, slugs. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
What USDA Hardiness Zone Does the Comfrey Need?
Comfrey grows outdoors in USDA Zone 3a – 9b. In cooler regions, grow Comfrey as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 3a – 9b
Keep exploring plants
Comfrey is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Symphytum genus — compare its care with other Symphytum species on PlantoScan.
Comfrey tolerates low-light rooms and shaded spots — browse the full list of low-light plants.
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