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