Life Span
Perennial
Perennial
Type
Herbaceous Perennial
Broadleaf Evergreen
Origin
China, Japan, Korea
Europe, Russia
Types
-
Symphytum officinale (common comfrey), Symphytum asperum (rough comfrey)
Number of Varieties
152
0
40000
👆🏻
Habitat
Dappled Shade, meadows, Shady Edge, Sunny Edge, Woodland Garden
Cold Regions, stream banks
USDA Hardiness Zone
5-96-11
0
99
👆🏻
AHS Heat Zone
9-4
-
Sunset Zone
2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
21,22
Habit
Clump-Forming
Upright/Erect
Plant Size
Minimum Height
60.00 cm20.00 cm
0
3900
👆🏻
Minimum Width
120.00 cm90.00 cm
0
6350
👆🏻
Plant Color
Flower Color
Light Yellow, Ivory
White, Light Pink
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
-
Orange Red
Leaf Color in Spring
Green
Red, Green, Copper
Leaf Color in Summer
Green
Green, Blue Green
Leaf Color in Fall
Green
Green, Blue Green
Leaf Color in Winter
-
Red, Dark Green, Burgundy, Bronze
Shape
Leaf Shape
Ovate
Oval
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall
Spring, Summer, Fall, Winter
Growing Conditions
Sunlight
Partial shade, Full Shade
Full Sun, Partial Sun, Partial shade
Growth Rate
Fast
Medium
Type of Soil
Clay, Loam, Sand
Loam, Sand
The pH of Soil
Acidic, Neutral, Alkaline
Acidic, Neutral
Soil Drainage
Poorly Drained
Well drained
Bloom Time
Early Spring, Late Winter
Late Spring, Early Summer, Summer
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Wet Site
-
Where to Plant?
Container, Ground, Pot
Container, Ground
How to Plant?
Divison, Seedlings
Root Division, Transplanting
Plant Maintenance
Medium
Low
Watering Plants
Watering Requirements
Water once every two or three weeks
Allow to dry out slightly between watering, Water daily during growing season
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
Acidic, Neutral, Alkaline
Acidic, Neutral
Soil Type
Clay, Loam, Sand
Loam, Sand
Soil Drainage Capacity
Poorly Drained
Well drained
Sun Exposure
Partial shade, Full Shade
Full Sun, Partial Sun, Partial shade
Pruning
Remove the old foliage
Cut or pinch the stems, Remove dead leaves
Fertilizers
Use a fertilizer ratio of 16-4-8
14-14-14 Fertilizer, All-Purpose Liquid Fertilizer, can go long without fertilizers
Pests and Diseases
-
Aphids, Stem spot
Plant Tolerance
Drought
Shallow soil, Sun
Flowers
Showy
Showy
Flower Petal Number
-
Single
Fruits
Showy Fruit
✔
✘
✔
✘
Edible Fruit
✔
✘
✔
✘
Fragrance
Fragrant Flower
✔
✘
✔
✘
Fragrant Fruit
✔
✘
✔
✘
Fragrant Leaf
✔
✘
✔
✘
Fragrant Bark/Stem
✔
✘
✔
✘
Showy Foliage
✔
✘
✔
✘
Showy Bark
✔
✘
✔
✘
Foliage Texture
Bold
Medium
Foliage Sheen
Glossy
Glossy
Evergreen
✔
✘
✔
✘
Invasive
Sometimes
Sometimes
Self-Sowing
✔
✘
✔
✘
Attracts
-
Ants, Butterflies, pollinators
Allergy
-
Antibacterial, Peripheral Edema
Uses
Aesthetic Uses
Bog Garden, Showy Purposes
Cottage Garden, Showy Purposes
Beauty Benefits
-
Acne, Beautiful Skin, Reduce Bruises, Remove blemishes
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification
Air purification, Fixes Nitrogen
Plant Benefits
Medicinal Uses
Antiasthamatic, Antispasmodic, Expectorant, Poultice
Asthma, Diarrhea, Obesity, Osteoarthritis
Part of Plant Used
Flowers, Stem
Leaves, Twigs
Other Uses
Can be boiled and seasoned, pickled, Used as umbrellas by Japanese children, Used as walking sticks, Used like rhubarb
Used for its medicinal properties
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Bog Garden, Container, Feature Plant, Water Gardens
Container, Feature Plant, Foundation, Groundcover, Hedges, Mixed Border, Tropical
Botanical Name
PETASITES japonicus
Symphytum asperum
Common Name
Giant Butterbur, Japanese Butterbur
Comfrey,Black Root, Blackwort, Bruisewort
In Hindi
Giant Butterbur
Blackwort
In German
Riesen Pestwurz
Blackwort
In French
géant Butterbur
Blackwort
In Spanish
gigante petasita
Blackwort
In Greek
Giant Butterbur
Blackwort
In Portuguese
Carrapicho gigante
Blackwort
In Polish
Giant Lepiężnik
Blackwort
In Latin
Giant Butterbur
Blackwort
Kingdom
Plantae
Plantae
Phylum
Magnoliophyta
Magnoliophyta
Class
Magnoliopsida
Magnoliopsida
Order
Asterales
Lamiales
Family
Asteraceae
Boraginaceae
Genus
Petasites
Symphytum
Clade
Angiosperms, Asterids, Eudicots
Angiosperms, Eudicots, Rosids
Tribe
Senecioneae
-
Subfamily
Asteroideae
Boraginoideae
Number of Species
135
1
27800
👆🏻