Life Span
Annual and Perennial
Annual
Type
Flowering Plants, Shrubs
Perennial
Origin
World/Pandemic, North America, Europe, Russia/Siberia, China, Korea
New Zealand
Types
Bigleaf hydrangea, Hortensia, Smooth hydrangea, Oakleaf hydrangea, Annabelle
-
Number of Varieties
10020
0
40000
👆🏻
Habitat
Forest edges, Hillside, Woods
All sorts of environments
USDA Hardiness Zone
2-117-9
0
99
👆🏻
AHS Heat Zone
7 - 1
9*6
Sunset Zone
7, 8, 9, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24
2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Habit
Upright/Erect
Mat-forming
Plant Size
Minimum Height
30.00 cm2.50 cm
0
3900
👆🏻
Minimum Width
30.00 cm25.40 cm
0
6350
👆🏻
Plant Color
Flower Color
Blue, Sky Blue, Indigo, Dark Blue
Yellow
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
Brown, Sandy Brown
-
Leaf Color in Spring
Sea Green, Gray Green
Green, Gray Green, Silver
Leaf Color in Summer
Sea Green, Gray Green
Gray Green, Silver
Leaf Color in Fall
Sea Green, Gray Green
Gray Green, Silver
Leaf Color in Winter
Light Green
Light Green
Shape
Leaf Shape
Oblovate
Tiny
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall
Spring, Summer, Fall, Winter
Growing Conditions
Sunlight
Full Sun, Partial Sun
Full Sun, Partial Sun, Partial shade
Growth Rate
Very Fast
Slow
Type of Soil
Loam, Sand
Loam, Sand
The pH of Soil
Acidic, Neutral, Alkaline
Acidic, Neutral, Alkaline
Soil Drainage
Well drained
Well drained
Bloom Time
Indeterminate
Summer
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Drought
Drought
Where to Plant?
Container, Ground, Pot
Container, Ground
How to Plant?
Seedlings
Seedlings
Plant Maintenance
Medium
High
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
Drought Tolerant, Average Water
In Spring
Moderate
Alternate Days
In Winter
Average Water
Moderate
Soil
Soil pH
Slightly Acidic
Acidic, Neutral, Alkaline
Soil Type
Loamy
Loam, Sand
Soil Drainage Capacity
Loamy
Well drained
Sun Exposure
Full Sun
Full Sun, Partial Sun, Partial shade
Pruning
Prune to control growth, Remove damaged leaves, Remove dead branches, Remove dead leaves
Requires very little pruning
Fertilizers
Compost
-
Pests and Diseases
Bacterial leaf spot, Botrytis Blight, Leafminers, Mealybugs, Mushroom root rot
Aphids, Spider mites
Plant Tolerance
Drought
Drought
Flowers
Showy
Insignificant
Flower Petal Number
Single
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
Matte
Matte
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Butterflies
Birds, Butterflies, Hummingbirds
Allergy
Chest tightness, Diarrhea, Dizziness, Nausea, Vomiting
-
Uses
Aesthetic Uses
Beautification, Bouquets, Landscape Designing, Showy Purposes
Bog Garden, Borders
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification, Food for insects, Indoor Air Purification, Prevent Soil Erosion, Very little waste
-
Plant Benefits
Medicinal Uses
Fever, Kidney problems, Urinary tract problems
-
Part of Plant Used
Flowers, Root
Whole plant
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
Showy Purposes
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Container, Herb
Alpine, Container, Rock Garden / Wall
Botanical Name
CENTAUREA cyanus
Raoulia glabra
Common Name
Batchelor's Buttons, Cornflower
Raoulia
In Hindi
Hydrangea
Raoulia
In German
Hortensie
Raoulia
In French
Hortensia
Raoulia
In Spanish
Hortensia
Raoulia
In Greek
υδραγεία
Raoulia
In Portuguese
Hortênsia
raoulia
In Polish
Hortensja
Raoulia
In Latin
Hibiscus
Raoulia
Kingdom
Plantae
Plantae
Phylum
Anthophyta
Tracheophyta
Class
Magnoliopsida
Magnoliopsida
Order
Asterales
Asterales
Family
Asteraceae
Asteraceae
Genus
Centaurea
Raoulia
Clade
Angiosperms, Asterids, Eudicots
Angiosperms, Asterids, Eudicots
Tribe
Cynareae
Gnaphalieae
Subfamily
Carduoideae
-
Number of Species
250100
1
27800
👆🏻