Life Span
Perennial
Perennial
Type
Broadleaf Evergreen
Herbaceous Perennial
Origin
-
China, Japan, Korea
Types
Rhododendron, Azalea indica, Azalea japonica
-
Number of Varieties
1015
0
40000
👆🏻
Habitat
Forests
Dappled Shade, meadows, Shady Edge, Sunny Edge, Woodland Garden
USDA Hardiness Zone
8-115-9
0
99
👆🏻
AHS Heat Zone
-
9-4
Sunset Zone
21,22
2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Habit
Oval or Rounded
Clump-Forming
Plant Size
Minimum Height
60.00 cm60.00 cm
0
3900
👆🏻
Minimum Width
90.00 cm120.00 cm
0
6350
👆🏻
Plant Color
Flower Color
Red
Light Yellow, Ivory
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
-
-
Leaf Color in Spring
Green, Dark Green
Green
Leaf Color in Summer
Green, Dark Green
Green
Leaf Color in Fall
Green, Dark Green
Green
Leaf Color in Winter
Green, Dark Green
-
Shape
Leaf Shape
Linear
Ovate
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
Spring, Summer, Fall
Growing Conditions
Sunlight
Full Sun, Partial Sun, Partial shade
Partial shade, Full Shade
Growth Rate
Medium
Fast
Type of Soil
Loam, Sand
Clay, Loam, Sand
The pH of Soil
Acidic
Acidic, Neutral, Alkaline
Soil Drainage
Well drained
Poorly Drained
Bloom Time
Early Spring, Spring, Late Fall, Winter, Late Winter
Early Spring, Late Winter
Repeat Bloomer
✔
✘
✔
✘
Tolerances
-
Wet Site
Where to Plant?
Ground
Container, Ground, Pot
How to Plant?
Seedlings, Stem Cutting
Divison, Seedlings
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Average Water Needs, Do not water frequently
Water once every two or three weeks
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
Acidic
Acidic, Neutral, Alkaline
Soil Type
Loam, Sand
Clay, Loam, Sand
Soil Drainage Capacity
Well drained
Poorly Drained
Sun Exposure
Full Sun, Partial Sun, Partial shade
Partial shade, Full Shade
Pruning
Remove damaged leaves, Remove dead branches, Remove dead leaves
Remove the old foliage
Fertilizers
All-Purpose Liquid Fertilizer, Apply N-P-K
Use a fertilizer ratio of 16-4-8
Pests and Diseases
Caterpillars, Citrus leaf miner, Petal blight, Red blotch, Rust, Twig blight, Whiteflies
-
Plant Tolerance
Drought, Shade areas
Drought
Flowers
Showy
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
Bold
Foliage Sheen
Matte
Glossy
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Onion thrips, White Pine Weevil
-
Allergy
-
-
Uses
Aesthetic Uses
Bonsai, Cottage Garden
Bog Garden, Showy Purposes
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification
Air purification
Plant Benefits
Medicinal Uses
Astringent
Antiasthamatic, Antispasmodic, Expectorant, Poultice
Part of Plant Used
Flowers, Leaves
Flowers, Stem
Other Uses
Repellent, used for making charcoal, Used for woodware
Can be boiled and seasoned, pickled, Used as umbrellas by Japanese children, Used as walking sticks, Used like rhubarb
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Container, Feature Plant, Foundation, Mixed Border, Rock Garden, Wall, Topiary, Bonsai, Espalier
Bog Garden, Container, Feature Plant, Water Gardens
Botanical Name
RHODODENDRON 'Anthopogon'
PETASITES japonicus
Common Name
Evergreen Azalea
Giant Butterbur, Japanese Butterbur
In Hindi
Azalea
Giant Butterbur
In German
Azalee
Riesen Pestwurz
In French
azalée
géant Butterbur
In Spanish
azalea
gigante petasita
In Greek
αζάλεα
Giant Butterbur
In Portuguese
Azalea
Carrapicho gigante
In Polish
azalia
Giant Lepiężnik
In Latin
Azalea
Giant Butterbur
Kingdom
Plantae
Plantae
Phylum
Tracheophyta
Magnoliophyta
Class
Magnoliopsida
Magnoliopsida
Order
Ericales
Asterales
Family
Ericaceae
Asteraceae
Genus
Rhododendron
Petasites
Clade
Angiosperms, Asterids, Eudicots
Angiosperms, Asterids, Eudicots
Tribe
Rhodoreae
Senecioneae
Subfamily
Ericoideae
Asteroideae
Number of Species
10241
1
27800
👆🏻