prickly comfrey
Symphytum asperum
USDA zones4 to 8
SunHandles full sun to partial sun
WaterNeeds moderate soil
Size2 to 4 feet tall2 to 4 feet wide
- Bloom season
- Spring, summer
- Bloom color
- Rose-pink changing to blue or purple
Notes
Prickly comfrey (Symphytum asperum) is a perennial for borders and informal beds. It is hardy to USDA zone 4, or down to -30°F (-34°C). This plant likes full or part sun and average moisture. The flowers open rose-pink and change to blue or purple. They bloom from late spring to mid summer. The plant grows 24 to 48 inches tall and wide, so give it room.
Pairs well with Cat mint, Mallow, and Stargazer lily.
Native range
Europe, Caucasus, and Iran.