Life Span
Perennial
Perennial
Type
Tree
Perennial
Origin
Central Asia, India, Nepal
-
Types
White oak, Bluff oak, Muller oak
-
Number of Varieties
60050
0
40000
👆🏻
Habitat
Clay soil areas, Dry areas, Sandy areas
Cold Regions, Temperate Regions
USDA Hardiness Zone
6-94-8
0
99
👆🏻
AHS Heat Zone
7-5
8-1
Sunset Zone
H1, 7, 8, 9, 14, 15, 16, 17, 20, 21, 22, 23, 24
1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17
Habit
Oval or Rounded
Cushion/Mound-forming
Plant Size
Minimum Height
2,286.00 cm20.30 cm
0
3900
👆🏻
Minimum Width
1,219.20 cm27.90 cm
0
6350
👆🏻
Plant Color
Flower Color
Red, Yellow green
Blue, Lavender
Flower Color Modifier
Bicolor
-
Fruit Color
Sandy Brown, Sienna
-
Leaf Color in Spring
Green, Light Green, Gray
Green, Purple
Leaf Color in Summer
Green, Gray
Green, Purple
Leaf Color in Fall
Green, Dark Green, Gray
Green, Purple
Leaf Color in Winter
Dark Green, Gray
Light Green
Shape
Leaf Shape
broad, flat
Linear
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
Spring, Summer, Fall
Growing Conditions
Sunlight
Full Sun, Partial Sun
Partial Sun, Partial shade
Growth Rate
Medium
Medium
Type of Soil
Loam
Clay, Loam, Sand
The pH of Soil
Acidic
Acidic, Neutral, Alkaline
Soil Drainage
Average
Average
Bloom Time
Spring
Early Spring, Spring, Late Spring, Early Summer
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Drought
Drought
Where to Plant?
Ground
Container, Ground
How to Plant?
Seedlings, Transplanting
Seedlings
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Average Water Needs
Average Water Needs, Keep ground moist, Water more in summer
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
Acidic
Acidic, Neutral, Alkaline
Soil Type
Loam
Clay, Loam, Sand
Soil Drainage Capacity
Average
Average
Sun Exposure
Full Sun, Partial Sun
Partial Sun, Partial shade
Pruning
Remove damaged leaves, Remove dead branches, Remove dead leaves
Remove damaged leaves, Remove dead branches, Remove dead leaves
Fertilizers
All-Purpose Liquid Fertilizer
All-Purpose Liquid Fertilizer, as it is a flowering plant, use high phosphorous content fertilizer
Pests and Diseases
Red blotch
Red blotch
Plant Tolerance
Drought
Drought
Flowers
✔
✘
✔
✘
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
Medium
Fine
Foliage Sheen
Glossy
Matte
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Birds
Butterflies
Allergy
Pollen
-
Uses
Aesthetic Uses
Showy Purposes
Beautification, Showy Purposes
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification, Nesting sites for birds, Shadow Tree, Shelter for wildlife, Wildlife
Air purification
Plant Benefits
Medicinal Uses
Chronic fatigue, Cramps, Diarrhea, Dysentry, gallstones, Haemorrhages, Menstrual Cramps
Black Dyes
Part of Plant Used
Leaves, Seeds, Wood
-
Other Uses
Used as firewood, used for making charcoal
-
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Feature Plant, Shade Trees
Feature Plant, Mixed Border, Rock Garden / Wall, Wildflower
Botanical Name
QUERCUS leucotrichophora
Polemonium caeruleum
Common Name
Banj Oak, Blackjack Oak, Himalayan Oak
Jacob's Ladder
In Hindi
Blackjack Oak Tree
Jacob's Ladder
In German
Blackjack Oak Tree
Jacob's Ladder
In French
Blackjack Oak Tree
Jacob's Ladder
In Spanish
Blackjack Oak Tree
Jacob's Ladder
In Greek
Blackjack Oak Tree
Jacob's Ladder
In Portuguese
Blackjack Carvalho
Jacob's Ladder
In Polish
Blackjack Oak Tree
Jacob's Ladder
In Latin
Blackjack quercum ligno
Jacob's Ladder
Kingdom
Plantae
Plantae
Phylum
Magnoliophyta
Tracheophyta
Class
Magnoliopsida
Magnoliopsida
Order
Fagales
Ericales
Family
Fagaceae
Polemoniaceae
Genus
Quercus
Polemonium
Clade
Angiosperms, Eudicots, Rosids
Angiosperms, Asterids, Eudicots
Tribe
-
-
Subfamily
-
-
Number of Species
6040
1
27800
👆🏻