Life Span
Annual and Perennial
Perennial
Type
Tender Perennial
Tree
Origin
Southern Europe, Mediterranean
United States, California
Types
Silver Lace, Cirrus
-
Number of Varieties
38
0
40000
👆🏻
Habitat
Coastal Regions, Warmer regions
Woodland Garden Canopy
USDA Hardiness Zone
7-116-9
0
99
👆🏻
AHS Heat Zone
12-1
9-1
Sunset Zone
H1, H2, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Habit
Cushion/Mound-forming
Spreading
Plant Size
Minimum Height
20.30 cm1,520.00 cm
0
3900
👆🏻
Minimum Width
30.50 cm1,370.00 cm
0
6350
👆🏻
Plant Color
Flower Color
White, Yellow, Purple
Red, Yellow green
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
Tan
-
Leaf Color in Spring
Blue Green, Silver
Green, Blue Green
Leaf Color in Summer
Blue Green, Silver
Green, Blue Green
Leaf Color in Fall
Blue Green, Silver
Yellow, Orange, Pink
Leaf Color in Winter
Light Green
-
Shape
Leaf Shape
Irregular
Irregular
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
Spring, Summer, Fall, Winter
Growing Conditions
Sunlight
Full Sun
Full Sun, Partial Sun
Growth Rate
Medium
Slow
Type of Soil
Clay, Loam, Sand
-
The pH of Soil
Acidic, Neutral, Alkaline
-
Soil Drainage
Well drained
-
Bloom Time
Early Summer, Summer, Late Summer
Spring
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Drought
Drought
Where to Plant?
Container, Ground
Ground
How to Plant?
Seedlings, Stem Planting
Seedlings
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Do Not over Water, Never Over-water, Requires regular watering, Requires watering in the growing season, Water Deeply
Average Water Needs
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
Full Sun, Partial Sun
Pruning
Remove dead leaves, Remove deadheads
Remove damaged leaves, Remove dead branches, Remove dead leaves, Remove dead or diseased plant parts
Fertilizers
fertilize every 2-3 weeks while growing, Nitrogen, Phosphorous, Potassium
All-Purpose Liquid Fertilizer
Pests and Diseases
Blight, Downy mildew, Powdery mildew, Red blotch, Rust, White mold
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
Matte
-
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Flying insects, Insects
Birds
Allergy
Avoid during Pregnancy, Skin irritation, Skin rash, Toxic
Pollen
Uses
Aesthetic Uses
Showy Purposes
Borders
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification, Food for insects, Prevent Soil Erosion
Air purification, Shadow Tree, soil erosion prevension on hill slopes, Wildlife, Windbreak
Plant Benefits
Medicinal Uses
Headache, Menstrual Disorders, Migraines
Astringent, Diarrhea, Dysentry, Haemorrhages, Poultice, Sore Eyes, Sore throat
Part of Plant Used
Leaves
Leaves, Seeds, Wood
Other Uses
Employed in herbal medicine, Showy Purposes, Used as Ornamental plant, Used for its medicinal properties
Adhesive, Basketary, Buttons, Repellent, Tannin, Used as fuel, Used for woodware
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Bedding Plant, Container, Cutflower, Edging, Mixed Border, Rock Garden / Wall
Feature Plant, Shade Trees, Street Trees
Botanical Name
CENTAUREA cineraria
QUERCUS douglasii
Common Name
Silver dust
Blue Oak
In Hindi
डस्टी मिलर
Blue Oak Tree
In German
Dusty Miller
Blaue Eiche
In French
Dusty Miller
Bleu Oak Tree
In Spanish
Dusty Miller
Azul del árbol de roble
In Greek
Dusty Miller
Μπλε Oak Tree
In Portuguese
Dusty Miller
Carvalho azul
In Polish
Dusty Miller
Niebieski Oak Tree
In Latin
Dusty Cicero
Blue quercum ligno
Kingdom
Plantae
Plantae
Phylum
Anthophyta
Magnoliophyta
Class
Magnoliopsida
Magnoliopsida
Order
Asterales
Fagales
Family
Asteraceae
Fagaceae
Genus
Centaurea
Quercus
Clade
Angiosperms, Asterids, Eudicots
Angiosperms, Eudicots, Rosids
Tribe
Cynareae
-
Subfamily
Carduoideae
-
Number of Species
120
1
27800
👆🏻