Life Span
Perennial
-
Type
Tree
Fruit
Origin
United States, California
-
Types
-
-
Number of Varieties
8-
0
40000
👆🏻
Habitat
Woodland Garden Canopy
Clay soil areas, Loamy soils, Sandy areas, Well Drained
USDA Hardiness Zone
6-95-9
0
99
👆🏻
AHS Heat Zone
9-1
9-2
Sunset Zone
3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
A1, A2, A3, 1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7
Habit
Spreading
Upright/Erect
Plant Size
Minimum Height
1,520.00 cm120.00 cm
0
3900
👆🏻
Minimum Width
1,370.00 cm120.00 cm
0
6350
👆🏻
Plant Color
Flower Color
Red, Yellow green
Green, Purple
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
-
Red, Purple, Burgundy, Black
Leaf Color in Spring
Green, Blue Green
Green
Leaf Color in Summer
Green, Blue Green
Green
Leaf Color in Fall
Yellow, Orange, Pink
Green
Leaf Color in Winter
-
Light Green
Shape
Leaf Shape
Irregular
Palmate
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
Summer, Fall
Growing Conditions
Sunlight
Full Sun, Partial Sun
Full Sun, Partial Sun, Partial shade
Growth Rate
Slow
Medium
Type of Soil
-
Clay, Loam, Sand
The pH of Soil
-
Acidic, Neutral, Alkaline
Soil Drainage
-
Well drained
Bloom Time
Spring
Spring
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Drought
Drought
Where to Plant?
Ground
Ground
How to Plant?
Seedlings
Budding, Seedlings, Stem Cutting
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Average Water Needs
Allow to dry out slightly between watering, Do not water frequently
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
-
Acidic, Neutral, Alkaline
Soil Type
-
Clay, Loam, Sand
Soil Drainage Capacity
-
Well drained
Sun Exposure
Full Sun, Partial Sun
Full Sun, Partial Sun, Partial shade
Pruning
Remove damaged leaves, Remove dead branches, Remove dead leaves, Remove dead or diseased plant parts
Do not prune during shooting season, Remove damaged leaves, Remove dead branches, Remove dead leaves, Thinning
Fertilizers
All-Purpose Liquid Fertilizer
Apply N-P-K, since leafy plants, use higher nitrogen content fertilizer
Pests and Diseases
Red blotch
Birds, Leaf spot, Red blotch
Plant Tolerance
Drought
Drought
Flowers
Insignificant
Insignificant
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
Medium
Foliage Sheen
-
Glossy
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Birds
Birds
Allergy
Pollen
-
Uses
Aesthetic Uses
Borders
Cottage Garden
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification, Shadow Tree, soil erosion prevension on hill slopes, Wildlife, Windbreak
Air purification
Plant Benefits
Medicinal Uses
Astringent, Diarrhea, Dysentry, Haemorrhages, Poultice, Sore Eyes, Sore throat
-
Part of Plant Used
Leaves, Seeds, Wood
Fruits
Other Uses
Adhesive, Basketary, Buttons, Repellent, Tannin, Used as fuel, Used for woodware
Used As Food
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Feature Plant, Shade Trees, Street Trees
Edible, Fruit / Fruit Tree, Hedges, Mixed Border
Botanical Name
QUERCUS douglasii
RIBES x culverwellii
Common Name
Blue Oak
Jostaberry
In Hindi
Blue Oak Tree
Jostaberry
In German
Blaue Eiche
Jostaberry
In French
Bleu Oak Tree
casseille
In Spanish
Azul del árbol de roble
Jostaberry
In Greek
Μπλε Oak Tree
Jostaberry
In Portuguese
Carvalho azul
Jostaberry
In Polish
Niebieski Oak Tree
Jostaberry
In Latin
Blue quercum ligno
OLIVE
Kingdom
Plantae
Plantae
Phylum
Magnoliophyta
Magnoliophyta
Class
Magnoliopsida
Equisetopsida
Order
Fagales
Saxifragales
Family
Fagaceae
Grossulariaceae
Genus
Quercus
Ribes
Clade
Angiosperms, Eudicots, Rosids
Angiosperms, Core eudicots, Eudicots
Tribe
-
-
Subfamily
-
-
Number of Species
203
1
27800
👆🏻