Life Span
Perennial
Perennial
Type
Tree
Broadleaf Evergreen
Origin
United States, Central United States
Europe, Russia
Types
Deciduous Tree
Symphytum officinale (common comfrey), Symphytum asperum (rough comfrey)
Number of Varieties
3342
0
40000
👆🏻
Habitat
Woodland Garden Canopy
Cold Regions, stream banks
USDA Hardiness Zone
5-86-11
0
99
👆🏻
AHS Heat Zone
8-4
-
Sunset Zone
7, 8, 9, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24
21,22
Habit
Spreading
Upright/Erect
Plant Size
Minimum Height
1,830.00 cm20.00 cm
0
3900
👆🏻
Minimum Width
1,220.00 cm90.00 cm
0
6350
👆🏻
Plant Color
Flower Color
Yellow green, Chartreuse
White, Light Pink
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
Chocolate
Orange Red
Leaf Color in Spring
Green, Gray Green
Red, Green, Copper
Leaf Color in Summer
Gray Green, Dark Green
Green, Blue Green
Leaf Color in Fall
Yellow, Tan, Brown
Green, Blue Green
Leaf Color in Winter
-
Red, Dark Green, Burgundy, Bronze
Shape
Leaf Shape
oblong or obovate
Oval
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall
Spring, Summer, Fall, Winter
Growing Conditions
Sunlight
Full Sun
Full Sun, Partial Sun, Partial shade
Growth Rate
Slow
Medium
Type of Soil
Clay, Loam
Loam, Sand
The pH of Soil
Acidic, Neutral, Alkaline
Acidic, Neutral
Soil Drainage
Well drained
Well drained
Bloom Time
Spring
Late Spring, Early Summer, Summer
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Pollution, Drought
-
Where to Plant?
Ground
Container, Ground
How to Plant?
Seedlings
Root Division, Transplanting
Plant Maintenance
Medium
Low
Watering Plants
Watering Requirements
Average Water Needs, Water during dry weather
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
Loam, Sand
Soil Drainage Capacity
Well drained
Well drained
Sun Exposure
Full Sun
Full Sun, Partial Sun, Partial shade
Pruning
Remove damaged leaves, Remove dead branches, Remove dead leaves
Cut or pinch the stems, Remove dead leaves
Fertilizers
Phosphorous
14-14-14 Fertilizer, All-Purpose Liquid Fertilizer, can go long without fertilizers
Pests and Diseases
Anthracnose, Sunken patches
Aphids, Stem spot
Plant Tolerance
Drought
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
Coarse
Medium
Foliage Sheen
Glossy
Glossy
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Birds
Ants, Butterflies, pollinators
Allergy
Severe allergen
Antibacterial, Peripheral Edema
Uses
Aesthetic Uses
Beautification
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
Antiseptic, Astringent, Emetic, Febrifuge, Tonic
Asthma, Diarrhea, Obesity, Osteoarthritis
Part of Plant Used
Seeds
Leaves, Twigs
Other Uses
Roasted seed is used as a coffee substitute, Used as a thickening in stews, Wood is used for making furniture
Used for its medicinal properties
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Feature Plant, Hedges, Screening / Wind Break, Shade Trees, Street Trees
Container, Feature Plant, Foundation, Groundcover, Hedges, Mixed Border, Tropical
Botanical Name
QUERCUS imbricaria
Symphytum asperum
Common Name
Shingle Oak
Comfrey,Black Root, Blackwort, Bruisewort
In Hindi
Shingle Oak
Blackwort
In German
Kies Eiche
Blackwort
In French
Shingle Oak
Blackwort
In Spanish
teja de madera de roble
Blackwort
In Greek
βότσαλα Oak
Blackwort
In Portuguese
Shingle Oak
Blackwort
In Polish
gont Oak
Blackwort
In Latin
Quercus imbricaria
Blackwort
Kingdom
Plantae
Plantae
Phylum
Magnoliophyta
Magnoliophyta
Class
Magnoliopsida
Magnoliopsida
Order
Fagales
Lamiales
Family
Fagaceae
Boraginaceae
Genus
Quercus
Symphytum
Clade
Angiosperms, Eudicots, Rosids
Angiosperms, Eudicots, Rosids
Tribe
-
-
Subfamily
Fagoideae
Boraginoideae
Number of Species
835
1
27800
👆🏻