Life Span
Type
Origin
Types
Number of Varieties
Habitat
USDA Hardiness Zone
AHS Heat Zone
Sunset Zone
Habit
Symphytum officinale (common comfrey), Symphytum asperum (rough comfrey)
Cold Regions, stream banks
United States, Northwestern United States, California
Phlox adsurgens, Phlox alyssifolia, Phlox amabilis
Moist Soils, Wet ground, Wet lands
3a, 3b, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18