Life Span
Perennial
Annual and Perennial
Type
Ornamental Grasses and Bamboo
Flowering Plants, Shrubs
Origin
Southern Europe, Western Europe, Mediterranean
World/Pandemic, North America, Europe, Russia/Siberia, China, Korea
Types
-
Bigleaf hydrangea, Hortensia, Smooth hydrangea, Oakleaf hydrangea, Annabelle
Number of Varieties
10100
0
40000
👆🏻
Habitat
Desert, Dry areas, Dry Forest, Rocky areas
Forest edges, Hillside, Woods
USDA Hardiness Zone
4-92-11
0
99
👆🏻
AHS Heat Zone
9 - 1
7 - 1
Sunset Zone
1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
7, 8, 9, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24
Habit
Cushion/Mound-forming
Upright/Erect
Plant Size
Minimum Height
45.00 cm30.00 cm
0
3900
👆🏻
Minimum Width
60.96 cm30.00 cm
0
6350
👆🏻
Plant Color
Flower Color
Blue Green
Blue, Sky Blue, Indigo, Dark Blue
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
-
Brown, Sandy Brown
Leaf Color in Spring
Blue Green, Silver, Gray
Sea Green, Gray Green
Leaf Color in Summer
Light Green
Sea Green, Gray Green
Leaf Color in Fall
Blue Green, Silver, Gray
Sea Green, Gray Green
Leaf Color in Winter
Blue Green, Tan, Silver, Gray
Light Green
Shape
Leaf Shape
Grass like
Oblovate
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
Spring, Summer, Fall
Growing Conditions
Sunlight
Full Sun
Full Sun, Partial Sun
Growth Rate
Medium
Very Fast
Type of Soil
Clay, Loam, Sand
Loam, Sand
The pH of Soil
Neutral, Alkaline
Acidic, Neutral, Alkaline
Soil Drainage
Well drained
Well drained
Bloom Time
Late Spring, Early Summer
Indeterminate
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Salt
Drought
Where to Plant?
Container, Ground
Container, Ground, Pot
How to Plant?
Rooted stem cutting, Seedlings, Stem Planting
Seedlings
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Average Water Needs, occasional watering once established, Requires regular watering, Requires watering in the growing season
Keep ground moist, Requires a lot of watering, Requires regular watering, Requires watering in the growing season
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
Neutral, Alkaline
Slightly Acidic
Soil Type
Clay, Loam, Sand
Loamy
Soil Drainage Capacity
Well drained
Loamy
Sun Exposure
Full Sun
Full Sun
Pruning
Cut or pinch the stems, Pinch Tips, Remove damaged leaves, Remove dead branches, Remove dead leaves
Prune to control growth, Remove damaged leaves, Remove dead branches, Remove dead leaves
Fertilizers
All-Purpose Liquid Fertilizer
Compost
Pests and Diseases
Red blotch
Bacterial leaf spot, Botrytis Blight, Leafminers, Mealybugs, Mushroom root rot
Plant Tolerance
Salt
Drought
Flowers
✔
✘
✔
✘
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
Fine
Medium
Foliage Sheen
Matte
Matte
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Butterflies, Hummingbirds
Butterflies
Allergy
Asthma, Itchiness, Rash, Rhinitis
Chest tightness, Diarrhea, Dizziness, Nausea, Vomiting
Uses
Aesthetic Uses
Ground Cover
Beautification, Bouquets, Landscape Designing, Showy Purposes
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification
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
Stem
Flowers, Root
Other Uses
Used as Ornamental plant
Can be made into a herbal tea, Decoration Purposes, Employed in herbal medicine, Showy Purposes, Used as Ornamental plant, Used for its medicinal properties
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Container, Edging, Mixed Border, Rock Garden / Wall
Container, Herb
Botanical Name
HELICTOTRICHON sempervirens
CENTAUREA cyanus
Common Name
Blue Oat Grass
Batchelor's Buttons, Cornflower
In Hindi
ब्लू जई घास
Hydrangea
In German
Blau Ährengras
Hortensie
In French
Bleu Oat Grass
Hortensia
In Spanish
Azul hierba de avena
Hortensia
In Greek
Μπλε βρώμης Grass
υδραγεία
In Portuguese
Azul Aveia
Hortênsia
In Polish
Niebieski Owies trawa
Hortensja
In Latin
Blue Oat Grass
Hibiscus
Kingdom
Plantae
Plantae
Phylum
Magnoliophyta
Anthophyta
Class
Liliopsida
Magnoliopsida
Order
Poales
Asterales
Family
Poaceae
Asteraceae
Genus
Helictotrichon
Centaurea
Clade
Angiosperms, Commelinids, Monocots
Angiosperms, Asterids, Eudicots
Tribe
Aveneae
Cynareae
Subfamily
Pooideae
Carduoideae
Number of Species
70250
1
27800
👆🏻