Life Span
Perennial
Perennial
Type
Cactus or Succulent, Tree
Broadleaf Evergreen
Origin
Southwestern United States, Mexico
Europe, Russia
Types
-
Symphytum officinale (common comfrey), Symphytum asperum (rough comfrey)
Number of Varieties
402
0
40000
👆🏻
Habitat
Desert, Dry areas, Rocky areas, Sandy areas
Cold Regions, stream banks
USDA Hardiness Zone
6-106-11
0
99
👆🏻
AHS Heat Zone
12-7
-
Sunset Zone
9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23
21,22
Habit
Upright/Erect
Upright/Erect
Plant Size
Minimum Height
610.00 cm20.00 cm
0
3900
👆🏻
Minimum Width
300.00 cm90.00 cm
0
6350
👆🏻
Plant Color
Flower Color
White, Ivory
White, Light Pink
Flower Color Modifier
-
Bicolor
Fruit Color
Light Green
Orange Red
Leaf Color in Spring
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
Olive, Gray Green, Dark Green
Red, Dark Green, Burgundy, Bronze
Shape
Leaf Shape
Linear
Oval
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
Spring, Summer, Fall, Winter
Growing Conditions
Sunlight
Full Sun
Full Sun, Partial Sun, Partial shade
Growth Rate
Very Slow
Medium
Type of Soil
Loam, Sand
Loam, Sand
The pH of Soil
Acidic, Neutral, Alkaline
Acidic, Neutral
Soil Drainage
Well drained
Well drained
Bloom Time
Early Spring, Spring, Late Winter
Late Spring, Early Summer, Summer
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Drought
-
Where to Plant?
Ground
Container, Ground
How to Plant?
Leaf Cutting, Stem Cutting
Root Division, Transplanting
Plant Maintenance
Medium
Low
Watering Plants
Watering Requirements
Allow soil to be completely dry in between waterings, Do not water frequently
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
Loam, Sand
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
All-Purpose Liquid Fertilizer, No fertilizers needed
14-14-14 Fertilizer, All-Purpose Liquid Fertilizer, can go long without fertilizers
Pests and Diseases
Brown Spots, Red blotch
Aphids, Stem spot
Plant Tolerance
Drought, Dry Conditions, Dry soil, Heat Tolerance, Rocky Soil, Sun
Shallow soil, Sun
Flowers
Showy
Showy
Flower Petal Number
Single
Single
Fruits
Showy Fruit
✔
✘
✔
✘
Edible Fruit
✔
✘
✔
✘
Fragrance
Fragrant Flower
✔
✘
✔
✘
Fragrant Fruit
✔
✘
✔
✘
Fragrant Leaf
✔
✘
✔
✘
Fragrant Bark/Stem
✔
✘
✔
✘
Showy Foliage
✔
✘
✔
✘
Showy Bark
✔
✘
✔
✘
Foliage Texture
Bold
Medium
Foliage Sheen
Matte
Glossy
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
-
Ants, Butterflies, pollinators
Allergy
-
Antibacterial, Peripheral Edema
Uses
Aesthetic Uses
Decorating walls
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
-
Asthma, Diarrhea, Obesity, Osteoarthritis
Part of Plant Used
-
Leaves, Twigs
Other Uses
-
Used for its medicinal properties
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Feature Plant, Rock Garden, Wall
Container, Feature Plant, Foundation, Groundcover, Hedges, Mixed Border, Tropical
Botanical Name
YUCCA brevifolia
Symphytum asperum
Common Name
yucca palm
tree yucca
palm tree yucca
Comfrey,Black Root, Blackwort, Bruisewort
In Hindi
Joshua Tree
Blackwort
In German
Joshua Tree
Blackwort
In French
Joshua Tree
Blackwort
In Spanish
Árbol de Joshua
Blackwort
In Greek
Joshua Tree
Blackwort
In Portuguese
Joshua Tree
Blackwort
In Polish
Joshua Tree
Blackwort
In Latin
Joshua ligno
Blackwort
Kingdom
Plantae
Plantae
Phylum
Tracheophyta
Magnoliophyta
Class
Magnoliopsida
Magnoliopsida
Order
Asparagales
Lamiales
Family
Agavaceae
Boraginaceae
Genus
Yucca
Symphytum
Clade
Angiosperms, Monocots
Angiosperms, Eudicots, Rosids
Tribe
-
-
Subfamily
-
Boraginoideae
Number of Species
5035
1
27800
👆🏻