Life Span
Perennial
Perennial
Type
Broadleaf Evergreen
Tree
Origin
Europe, Russia
Europe, Southern Asia, Southeastern Asia, India, China
Types
Symphytum officinale (common comfrey), Symphytum asperum (rough comfrey)
cinnamomeum, zeylanicum, delavayi
Number of Varieties
25
0
40000
👆🏻
Habitat
Cold Regions, stream banks
Dappled Shade, Woodlands
USDA Hardiness Zone
6-117-9
0
99
👆🏻
AHS Heat Zone
-
9-6
Sunset Zone
21,22
H1, 8, 9, 14, 15, 16, 17, 23, 24
Habit
Upright/Erect
Upright/Erect
Plant Size
Minimum Height
20.00 cm910.00 cm
0
3900
👆🏻
Minimum Width
90.00 cm300.00 cm
0
6350
👆🏻
Plant Color
Flower Color
White, Light Pink
White, Red, Pink
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
Orange Red
Brown, Chocolate
Leaf Color in Spring
Red, Green, Copper
Green, Dark Green
Leaf Color in Summer
Green, Blue Green
Dark Green
Leaf Color in Fall
Green, Blue Green
Dark Green
Leaf Color in Winter
Red, Dark Green, Burgundy, Bronze
Dark Green
Shape
Leaf Shape
Oval
Ovate
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
Spring, Summer, Fall, Winter
Growing Conditions
Sunlight
Full Sun, Partial Sun, Partial shade
Full Sun, Partial Sun
Growth Rate
Medium
Medium
Type of Soil
Loam, Sand
Loam, Sand
The pH of Soil
Acidic, Neutral
Acidic
Soil Drainage
Well drained
Average
Bloom Time
Late Spring, Early Summer, Summer
Early Spring, Spring, Late Spring
Repeat Bloomer
✔
✘
✔
✘
Tolerances
-
-
Where to Plant?
Container, Ground
Ground
How to Plant?
Root Division, Transplanting
Seedlings
Plant Maintenance
Low
Medium
Watering Plants
Watering Requirements
Allow to dry out slightly between watering, Water daily during growing season
Reduce water once established
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
Acidic, Neutral
Acidic
Soil Type
Loam, Sand
Loam, Sand
Soil Drainage Capacity
Well drained
Average
Sun Exposure
Full Sun, Partial Sun, Partial shade
Full Sun, Partial Sun
Pruning
Cut or pinch the stems, Remove dead leaves
Prune after flowering, Prune if you want to improve plant shape, Remove dead or diseased plant parts
Fertilizers
14-14-14 Fertilizer, All-Purpose Liquid Fertilizer, can go long without fertilizers
Doesn't require fertilization when grown in rich soil, Fertilize in early spring, fertilize in winter, Mulch
Pests and Diseases
Aphids, Stem spot
Phytophthora, Thripes
Plant Tolerance
Shallow soil, Sun
-
Flowers
Showy
Showy
Flower Petal Number
Single
Single
Fruits
Showy Fruit
✔
✘
✔
✘
Edible Fruit
✔
✘
✔
✘
Fragrance
Fragrant Flower
✔
✘
✔
✘
Fragrant Fruit
✔
✘
✔
✘
Fragrant Leaf
✔
✘
✔
✘
Fragrant Bark/Stem
✔
✘
✔
✘
Showy Foliage
✔
✘
✔
✘
Showy Bark
✔
✘
✔
✘
Foliage Texture
Medium
Coarse
Foliage Sheen
Glossy
Glossy
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Ants, Butterflies, pollinators
Butterflies
Allergy
Antibacterial, Peripheral Edema
-
Uses
Aesthetic Uses
Cottage Garden, Showy Purposes
Showy Purposes
Beauty Benefits
Acne, Beautiful Skin, Reduce Bruises, Remove blemishes
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification, Fixes Nitrogen
Insect Repellent, Shadow Tree, Windbreak
Plant Benefits
Medicinal Uses
Asthma, Diarrhea, Obesity, Osteoarthritis
antimicrobial, Cancer, Dermatitis
Part of Plant Used
Leaves, Twigs
Flowers, Leaves
Other Uses
Used for its medicinal properties
Used as fuel, Used as insect repellent, Used as Ornamental plant, Used for its medicinal properties
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Container, Feature Plant, Foundation, Groundcover, Hedges, Mixed Border, Tropical
Feature Plant, Mixed Border, Topiary / Bonsai / Espalier
Botanical Name
Symphytum asperum
RHODODENDRON arboreum
Common Name
Comfrey,Black Root, Blackwort, Bruisewort
Chalan, Rose Tree, Tree Rhododendron
In Hindi
Blackwort
लाल बुरांश
In German
Blackwort
Rhododendron arboreum
In French
Blackwort
Rhododendron arboreum
In Spanish
Blackwort
arboreum rododendro
In Greek
Blackwort
Rhododendron arboreum
In Portuguese
Blackwort
arboreum Rhododendron
In Polish
Blackwort
różanecznik drzewiasty
In Latin
Blackwort
Prunus arborea
Kingdom
Plantae
Plantae
Phylum
Magnoliophyta
Magnoliophyta
Class
Magnoliopsida
Magnoliopsida
Order
Lamiales
Ericales
Family
Boraginaceae
Ericaceae
Genus
Symphytum
Rhododendron
Clade
Angiosperms, Eudicots, Rosids
Angiosperms, Asterids, Eudicots
Tribe
-
-
Subfamily
Boraginoideae
-
Number of Species
351000
1
27800
👆🏻