Life Span
Perennial
Perennial
Type
Tree
Broadleaf Evergreen
Origin
North America, United States, Northeastern United States, Mid-Atlantic United States, Southeastern United States, Central United States, South-Central United States, Texas
Europe, Russia
Types
Quercus phellos, Quercus nigra
Symphytum officinale (common comfrey), Symphytum asperum (rough comfrey)
Number of Varieties
552
0
40000
👆🏻
Habitat
Hot climate regions, low mountains, Tropical regions
Cold Regions, stream banks
USDA Hardiness Zone
6-96-11
0
99
👆🏻
AHS Heat Zone
9-3
-
Sunset Zone
2a, 2b, 3a, 3b, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21
21,22
Habit
Oval or Rounded
Upright/Erect
Plant Size
Minimum Height
1,220.00 cm20.00 cm
0
3900
👆🏻
Minimum Width
910.00 cm90.00 cm
0
6350
👆🏻
Plant Color
Flower Color
Red, Light Green, Chartreuse
White, Light Pink
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
Tan, Chocolate
Orange Red
Leaf Color in Spring
Green, Light Green
Red, Green, Copper
Leaf Color in Summer
Green, Dark Green
Green, Blue Green
Leaf Color in Fall
Yellow, Orange, Sandy Brown
Green, Blue Green
Leaf Color in Winter
-
Red, Dark Green, Burgundy, Bronze
Shape
Leaf Shape
Irregular
Oval
Thorns
✔
✘
✔
✘
Plant Season
Spring, Fall
Spring, Summer, Fall, Winter
Growing Conditions
Sunlight
Full Sun, Partial Sun
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
Average
Well drained
Bloom Time
Spring, Late Spring
Late Spring, Early Summer, Summer
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Wet Site, Pollution, Soil Compaction
-
Where to Plant?
Ground
Container, Ground
How to Plant?
Grafting, Seedlings
Root Division, Transplanting
Plant Maintenance
Low
Low
Watering Plants
Watering Requirements
Allow to dry out slightly between watering, Does not require lot of watering
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
cut main flower spike, Prune every year, Remove damaged leaves, Remove dead branches, Remove dead leaves
Cut or pinch the stems, Remove dead leaves
Fertilizers
All-Purpose Liquid Fertilizer, Bonemeal, fertilize in growing season
14-14-14 Fertilizer, All-Purpose Liquid Fertilizer, can go long without fertilizers
Pests and Diseases
Azalea leaf gall, Fusarium leaf spot, Leaf rust, Mildew
Aphids, Stem spot
Plant Tolerance
Heat Tolerance, Humidity, Salt and Soil Compaction
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
Fine
Medium
Foliage Sheen
Glossy
Glossy
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Birds
Ants, Butterflies, pollinators
Allergy
Eczema, Rhinitis, Runny nose
Antibacterial, Peripheral Edema
Uses
Aesthetic Uses
Landscape Designing, Showy Purposes
Cottage Garden, Showy Purposes
Beauty Benefits
Blood purifying, Reduce Bruises, Weightloss
Acne, Beautiful Skin, Reduce Bruises, Remove blemishes
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification
Air purification, Fixes Nitrogen
Plant Benefits
Medicinal Uses
Gout, Obesity, Snoring
Asthma, Diarrhea, Obesity, Osteoarthritis
Part of Plant Used
Bark, Stem
Leaves, Twigs
Other Uses
Animal Feed, Biodiesel, Recovering internal injuries
Used for its medicinal properties
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Shade Trees, Street Trees
Container, Feature Plant, Foundation, Groundcover, Hedges, Mixed Border, Tropical
Botanical Name
QUERCUS phellos
Symphytum asperum
Common Name
Willow Oak
Comfrey,Black Root, Blackwort, Bruisewort
In Hindi
Overcup ओक
Blackwort
In German
Overcup Oak
Blackwort
In French
Overcup Oak
Blackwort
In Spanish
Overcup Roble
Blackwort
In Greek
Overcup Oak
Blackwort
In Portuguese
Overcup Oak
Blackwort
In Polish
Overcup Dąb
Blackwort
In Latin
Oryza
Blackwort
Kingdom
Plantae
Plantae
Phylum
-
Magnoliophyta
Class
Magnoliopsida
Magnoliopsida
Order
Fagales
Lamiales
Family
Fagaceae
Boraginaceae
Genus
Quercus
Symphytum
Clade
Angiosperms, Eudicots, Rosids
Angiosperms, Eudicots, Rosids
Tribe
-
-
Subfamily
Amaryllidoideae
Boraginoideae
Number of Species
40035
1
27800
👆🏻