Life Span
Perennial
Perennial
Type
Tree
Broadleaf Evergreen
Origin
North America, United States, Northeastern United States, Mid-Atlantic United States, Southeastern United States, North-Central United States, Central United States, South-Central United States, Canada
Europe, Russia
Types
Japanese Evergreen Oak, Sawthorn Oak, Oriental White Oak
Symphytum officinale (common comfrey), Symphytum asperum (rough comfrey)
Habitat
Woodland Garden Canopy
Cold Regions, stream banks
USDA Hardiness Zone
4-8
6-11
Sunset Zone
2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17
21,22
Habit
Upright/Erect
Upright/Erect
Flower Color
Red, Light Yellow, Yellow green
White, Light Pink
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
Brown, Sandy Brown, Chocolate
Orange Red
Leaf Color in Spring
Green, Copper
Red, Green, Copper
Leaf Color in Summer
Dark Green
Green, Blue Green
Leaf Color in Fall
Orange, Brown, Dark Red
Green, Blue Green
Leaf Color in Winter
-
Red, Dark Green, Burgundy, Bronze
Plant Season
Spring, Summer, Fall, Winter
Spring, Summer, Fall, Winter
Sunlight
Full Sun, Partial Sun
Full Sun, Partial Sun, Partial shade
Type of Soil
Clay, Loam, Sand
Loam, Sand
The pH of Soil
Acidic, Neutral
Acidic, Neutral
Soil Drainage
Average
Well drained
Bloom Time
Spring
Late Spring, Early Summer, Summer
Tolerances
Wet Site, Drought
-
Where to Plant?
Ground
Container, Ground
How to Plant?
Seedlings, Transplanting
Root Division, Transplanting
Plant Maintenance
Medium
Low
Watering Requirements
Average Water Needs, Keep the ground moist but not water-logged, Needs a lot of water initially, occasional watering once established, Water Deeply
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 pH
Acidic, Neutral
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 branches, Remove damaged fruit, Remove damaged leaves, Remove dead branches, Remove dead leaves, Remove dead or diseased plant parts, Remove deadheads
Cut or pinch the stems, Remove dead leaves
Fertilizers
All-Purpose Liquid Fertilizer, High amounts of nutrients, organic fertlizers
14-14-14 Fertilizer, All-Purpose Liquid Fertilizer, can go long without fertilizers
Pests and Diseases
Red blotch
Aphids, Stem spot
Plant Tolerance
Drought, Wet Site
Shallow soil, Sun
Flowers
Insignificant
Showy
Flower Petal Number
-
Single
Fragrant Bark/Stem
Yes
No
Foliage Texture
Medium
Medium
Foliage Sheen
Glossy
Glossy
Attracts
Birds
Ants, Butterflies, pollinators
Allergy
Hay fever, Itchy eyes, Runny nose, sneezing, Watery eyes, Whooping Cough
Antibacterial, Peripheral Edema
Aesthetic Uses
-
Cottage Garden, Showy Purposes
Beauty Benefits
-
Acne, Beautiful Skin, Reduce Bruises, Remove blemishes
Environmental Uses
Air purification, Nesting sites for birds, Shadow Tree, Shelter for wildlife, Wildlife
Air purification, Fixes Nitrogen
Medicinal Uses
Antiaphonic, Antiasthamatic, Astringent, Chronic fatigue, Cold, Dysentry, Emetic, Febrifuge, Haemorrhages, Indigestion, Opthalmic, Salve, Sore Eyes, Sore throat, Tonic, Treating fever
Asthma, Diarrhea, Obesity, Osteoarthritis
Part of Plant Used
Inner Bark, Leaves, Seeds
Leaves, Twigs
Other Uses
Tannin, Used as a dye, Used as fuel, Used as insect repellent, Used for woodware
Used for its medicinal properties
Used As Indoor Plant
No
No
Used As Outdoor Plant
Yes
Yes
Garden Design
Feature Plant, Shade Trees
Container, Feature Plant, Foundation, Groundcover, Hedges, Mixed Border, Tropical
Botanical Name
QUERCUS velutina
Symphytum asperum
Common Name
Black Oak
Comfrey,Black Root, Blackwort, Bruisewort
In Hindi
Black Oak Tree
Blackwort
In German
Schwarz Oak Tree
Blackwort
In French
Noir Oak Tree
Blackwort
In Spanish
Negro del árbol de roble
Blackwort
In Greek
Black Oak Tree
Blackwort
In Portuguese
Carvalho Preto
Blackwort
In Polish
Czarny Dąb
Blackwort
In Latin
Niger quercum ligno
Blackwort
Phylum
Magnoliophyta
Magnoliophyta
Class
Magnoliopsida
Magnoliopsida
Family
Fagaceae
Boraginaceae
Clade
Angiosperms, Eudicots, Rosids
Angiosperms, Eudicots, Rosids
Subfamily
-
Boraginoideae
Season and Care of Black Oak and Comfrey
Season and care of Black Oak and Comfrey is important to know. While considering everything about Black Oak and Comfrey Care, growing season is an essential factor. Black Oak season is Spring, Summer, Fall and Winter and Comfrey season is Spring, Summer, Fall and Winter. The type of soil for Black Oak is Clay, Loam, Sand and for Comfrey is Loam, Sand while the PH of soil for Black Oak is Acidic, Neutral and for Comfrey is Acidic, Neutral.
Black Oak and Comfrey Physical Information
Black Oak and Comfrey physical information is very important for comparison. Black Oak height is 2,438.40 cm and width 1,219.20 cm whereas Comfrey height is 20.00 cm and width 90.00 cm. The color specification of Black Oak and Comfrey are as follows:
Black Oak flower color: Red, Light Yellow and Yellow green
Black Oak leaf color: Green and Copper
Comfrey flower color: White and Light Pink
- Comfrey leaf color: Red, Green and Copper
Care of Black Oak and Comfrey
Care of Black Oak and Comfrey include pruning, fertilizers, watering etc. Black Oak pruning is done Remove branches, Remove damaged fruit, Remove damaged leaves, Remove dead branches, Remove dead leaves, Remove dead or diseased plant parts and Remove deadheads and Comfrey pruning is done Cut or pinch the stems and Remove dead leaves. In summer Black Oak needs Lots of watering and in winter, it needs Average Water. Whereas, in summer Comfrey needs Lots of watering and in winter, it needs Average Water.