Life Span
Perennial
Annual
Type
Tree
Bulb or Corm or Tuber
Origin
United States, California
Eastern Europe, Southern Europe, Mediterranean, Turkey, Western Asia
Types
-
Mountain silverbell , Rosea
Number of Varieties
83
0
40000
👆🏻
Habitat
Woodland Garden Canopy
Floodplains, low mountains, Lower slopes, secondary forest
USDA Hardiness Zone
6-95-9
0
99
👆🏻
AHS Heat Zone
9-1
9-5
Sunset Zone
3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
21,22
Habit
Spreading
Clump-Forming
Plant Size
Minimum Height
1,520.00 cm25.40 cm
0
3900
👆🏻
Minimum Width
1,370.00 cm30.50 cm
0
6350
👆🏻
Plant Color
Flower Color
Red, Yellow green
White
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
-
-
Leaf Color in Spring
Green, Blue Green
Green
Leaf Color in Summer
Green, Blue Green
Light Green
Leaf Color in Fall
Yellow, Orange, Pink
Several shades of Green
Leaf Color in Winter
-
Light Green
Shape
Leaf Shape
Irregular
Acuminate
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
Spring
Growing Conditions
Sunlight
Full Sun, Partial Sun
Full Sun, Partial Sun, Partial shade
Growth Rate
Slow
Fast
Type of Soil
-
-
The pH of Soil
-
-
Soil Drainage
-
Well drained
Bloom Time
Spring
Spring, Late Spring
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Drought
Drought
Where to Plant?
Ground
Ground
How to Plant?
Seedlings
Layering, Seedlings, Stem Cutting
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Average Water Needs
occasional watering once established
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
-
-
Soil Type
-
-
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
Prune grass to maintain level, Remove damaged leaves, Remove dead branches, Remove dead leaves
Fertilizers
All-Purpose Liquid Fertilizer
All-Purpose Liquid Fertilizer
Pests and Diseases
Red blotch
Pests and diseases free
Plant Tolerance
Drought
Drought and Salt
Flowers
Insignificant
Showy
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
Bees, Flying insects
Allergy
Pollen
-
Uses
Aesthetic Uses
Borders
along a porch, deck or patio, Beautification, Cottage Garden, Showy Purposes, Wild gardens
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
-
Other Uses
Adhesive, Basketary, Buttons, Repellent, Tannin, Used as fuel, Used for woodware
Decoration Purposes
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Feature Plant, Shade Trees, Street Trees
Container, Cutflower, Mixed Border, Rock Garden / Wall
Botanical Name
QUERCUS douglasii
ORNITHOGALUM nutans
Common Name
Blue Oak
Drooping Star-of-Bethlehem, Nodding Star-of-Bethlehem, Silver Bells
In Hindi
Blue Oak Tree
Silver bells
In German
Blaue Eiche
Silver bells
In French
Bleu Oak Tree
Silver bells
In Spanish
Azul del árbol de roble
Silver bells
In Greek
Μπλε Oak Tree
Silver bells
In Portuguese
Carvalho azul
Silver bells
In Polish
Niebieski Oak Tree
Silver bells
In Latin
Blue quercum ligno
Silver bells
Kingdom
Plantae
Plantae
Phylum
Magnoliophyta
Angiosperms
Class
Magnoliopsida
Magnoliopsida
Order
Fagales
Ebenales
Family
Fagaceae
Asparagaceae
Genus
Quercus
Halesia
Clade
Angiosperms, Eudicots, Rosids
Eudicots
Tribe
-
-
Subfamily
-
-
Number of Species
204
1
27800
👆🏻