Life Span
Annual and Perennial
Perennial
Type
Flowering Plants, Shrubs
Tree
Origin
World/Pandemic, North America, Europe, Russia/Siberia, China, Korea
United States, California
Types
Bigleaf hydrangea, Hortensia, Smooth hydrangea, Oakleaf hydrangea, Annabelle
-
Number of Varieties
1008
0
40000
👆🏻
Habitat
Forest edges, Hillside, Woods
Woodland Garden Canopy
USDA Hardiness Zone
2-116-9
0
99
👆🏻
AHS Heat Zone
7 - 1
9-1
Sunset Zone
7, 8, 9, 12, 13, 14, 15, 16, 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
Upright/Erect
Spreading
Plant Size
Minimum Height
30.00 cm1,520.00 cm
0
3900
👆🏻
Minimum Width
30.00 cm1,370.00 cm
0
6350
👆🏻
Plant Color
Flower Color
Blue, Sky Blue, Indigo, Dark Blue
Red, Yellow green
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
Brown, Sandy Brown
-
Leaf Color in Spring
Sea Green, Gray Green
Green, Blue Green
Leaf Color in Summer
Sea Green, Gray Green
Green, Blue Green
Leaf Color in Fall
Sea Green, Gray Green
Yellow, Orange, Pink
Leaf Color in Winter
Light Green
-
Shape
Leaf Shape
Oblovate
Irregular
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall
Spring, Summer, Fall, Winter
Growing Conditions
Sunlight
Full Sun, Partial Sun
Full Sun, Partial Sun
Growth Rate
Very Fast
Slow
Type of Soil
Loam, Sand
-
The pH of Soil
Acidic, Neutral, Alkaline
-
Soil Drainage
Well drained
-
Bloom Time
Indeterminate
Spring
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Drought
Drought
Where to Plant?
Container, Ground, Pot
Ground
How to Plant?
Seedlings
Seedlings
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Keep ground moist, Requires a lot of watering, Requires regular watering, Requires watering in the growing season
Average Water Needs
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
Slightly Acidic
-
Soil Type
Loamy
-
Soil Drainage Capacity
Loamy
-
Sun Exposure
Full Sun
Full Sun, Partial Sun
Pruning
Prune to control growth, Remove damaged leaves, Remove dead branches, Remove dead leaves
Remove damaged leaves, Remove dead branches, Remove dead leaves, Remove dead or diseased plant parts
Fertilizers
Compost
All-Purpose Liquid Fertilizer
Pests and Diseases
Bacterial leaf spot, Botrytis Blight, Leafminers, Mealybugs, Mushroom root rot
Red blotch
Plant Tolerance
Drought
Drought
Flowers
Showy
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
Butterflies
Birds
Allergy
Chest tightness, Diarrhea, Dizziness, Nausea, Vomiting
Pollen
Uses
Aesthetic Uses
Beautification, Bouquets, Landscape Designing, Showy Purposes
Borders
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification, Food for insects, Indoor Air Purification, Prevent Soil Erosion, Very little waste
Air purification, Shadow Tree, soil erosion prevension on hill slopes, Wildlife, Windbreak
Plant Benefits
Medicinal Uses
Fever, Kidney problems, Urinary tract problems
Astringent, Diarrhea, Dysentry, Haemorrhages, Poultice, Sore Eyes, Sore throat
Part of Plant Used
Flowers, Root
Leaves, Seeds, Wood
Other Uses
Can be made into a herbal tea, Decoration Purposes, 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
Container, Herb
Feature Plant, Shade Trees, Street Trees
Botanical Name
CENTAUREA cyanus
QUERCUS douglasii
Common Name
Batchelor's Buttons, Cornflower
Blue Oak
In Hindi
Hydrangea
Blue Oak Tree
In German
Hortensie
Blaue Eiche
In French
Hortensia
Bleu Oak Tree
In Spanish
Hortensia
Azul del árbol de roble
In Greek
υδραγεία
Μπλε Oak Tree
In Portuguese
Hortênsia
Carvalho azul
In Polish
Hortensja
Niebieski Oak Tree
In Latin
Hibiscus
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
25020
1
27800
👆🏻