Life Span
Perennial
Perennial
Type
Tree
Broadleaf Evergreen
Origin
Southern Europe, Mediterranean, Northern Africa
Europe, Russia
Types
-
Symphytum officinale (common comfrey), Symphytum asperum (rough comfrey)
Number of Varieties
12
0
40000
👆🏻
Habitat
Open Forest
Cold Regions, stream banks
USDA Hardiness Zone
7-96-11
0
99
👆🏻
AHS Heat Zone
12-3
-
Sunset Zone
5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24
21,22
Habit
Oval or Rounded
Upright/Erect
Plant Size
Minimum Height
1,070.00 cm20.00 cm
0
3900
👆🏻
Minimum Width
910.00 cm90.00 cm
0
6350
👆🏻
Plant Color
Flower Color
Red, Yellow green
White, Light Pink
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
-
Orange Red
Leaf Color in Spring
Green, Gray Green, Dark Green
Red, Green, Copper
Leaf Color in Summer
Gray Green, Dark Green
Green, Blue Green
Leaf Color in Fall
Gray Green, Dark Green
Green, Blue Green
Leaf Color in Winter
Gray Green, Dark Green
Red, Dark Green, Burgundy, Bronze
Shape
Leaf Shape
Lobed
Oval
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
Spring, Summer, Fall, Winter
Growing Conditions
Sunlight
Full Sun, Partial Sun
Full Sun, Partial Sun, Partial shade
Growth Rate
Slow
Medium
Type of Soil
Clay, Loam, Sand
Loam, Sand
The pH of Soil
Acidic, Neutral, Alkaline
Acidic, Neutral
Soil Drainage
Average
Well drained
Bloom Time
Spring
Late Spring, Early Summer, Summer
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Drought, Salt
-
Where to Plant?
Ground
Container, Ground
How to Plant?
Seedlings, Stem Planting, Transplanting
Root Division, Transplanting
Plant Maintenance
Medium
Low
Watering Plants
Watering Requirements
Average Water Needs, Do Not over Water, Keep ground moist, Never Over-water, Requires watering in the growing season, Water less during winter
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
Average
Well drained
Sun Exposure
Full Sun, Partial Sun
Full Sun, Partial Sun, Partial shade
Pruning
Remove damaged leaves, Remove dead leaves, Requires little pruning
Cut or pinch the stems, Remove dead leaves
Fertilizers
fertilize in growing season
14-14-14 Fertilizer, All-Purpose Liquid Fertilizer, can go long without fertilizers
Pests and Diseases
Spider mites
Aphids, Stem spot
Plant Tolerance
Drought, Salt
Shallow soil, Sun
Flowers
Insignificant
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
Medium
Medium
Foliage Sheen
Glossy
Glossy
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Birds
Ants, Butterflies, pollinators
Allergy
-
Antibacterial, Peripheral Edema
Uses
Aesthetic Uses
Landscape Designing
Cottage Garden, Showy Purposes
Beauty Benefits
-
Acne, Beautiful Skin, Reduce Bruises, Remove blemishes
Edible Uses
✔
✘
✔
✘
Environmental Uses
Absorbs greenhouse gases, Air purification, Amazing growth rate, Food for birds, Food for insects, Nesting sites for birds, Prevent Soil Erosion, Shadow Tree
Air purification, Fixes Nitrogen
Plant Benefits
Medicinal Uses
Nutrients
Asthma, Diarrhea, Obesity, Osteoarthritis
Part of Plant Used
Bark, Seeds, Stem, Tree trunks
Leaves, Twigs
Other Uses
Economic Purpose, Used in construction
Used for its medicinal properties
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Feature Plant, Shade Trees, Street Trees
Container, Feature Plant, Foundation, Groundcover, Hedges, Mixed Border, Tropical
Botanical Name
QUERCUS suber
Symphytum asperum
Common Name
Cork Oak
Comfrey,Black Root, Blackwort, Bruisewort
In Hindi
कॉर्क ओक
Blackwort
In German
Kork Eiche
Blackwort
In French
Cork Oak
Blackwort
In Spanish
alcornoque
Blackwort
In Greek
Cork Oak
Blackwort
In Portuguese
sobreiro
Blackwort
In Polish
Cork Oak
Blackwort
In Latin
sUBER
Blackwort
Kingdom
Plantae
Plantae
Phylum
Anthophyta
Magnoliophyta
Class
Magnoliopsida
Magnoliopsida
Order
Fagales
Lamiales
Family
Fagaceae
Boraginaceae
Genus
Quercus
Symphytum
Clade
Angiosperms, Eudicots, Rosids
Angiosperms, Eudicots, Rosids
Tribe
Mirini
-
Subfamily
Mirinae
Boraginoideae
Number of Species
2035
1
27800
👆🏻