Rubrum comfrey
Symphytum rubrum 'Rubrum'
USDA zones3 to 7
SunHandles full sun to partial sun
WaterHandles moderate to moist soil
Size12 to 24 inches tall12 to 24 inches wide
- Bloom season
- Spring, summer
- Soil types
- Sand, loam, clay, chalk
- Soil pH
- Acid, alkaline, neutral
Garden uses
Notes
'Rubrum' comfrey (Symphytum rubrum 'Rubrum') is a perennial for borders, ground cover, and low maintenance beds. It is hardy to USDA zone 3, or down to -40°F (-40°C). This plant likes full or part sun and average to moist soil of most types. It grows 12 to 24 inches tall and wide, so it fills a space well. It blooms in spring and again in summer, and it also grows in acid, alkaline, or neutral soil.
Pairs well with Hardy geranium, Siberian iris, and Marsh spurge.