Life Span
Perennial
Biennial
Type
Shrubs
Tree
Origin
China, Japan, Korea
Central United States, Canada
Types
Petasites hybridus
Two-petal ash, Single-leaf ash, Fragrant ash
Number of Varieties
1065
0
40000
👆🏻
Habitat
Wet lands
Dry areas, Hills, limestone outcrops, Moist woods
USDA Hardiness Zone
5-94-8
0
99
👆🏻
AHS Heat Zone
9-4
8-4
Sunset Zone
2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
2a, 2b, 3a, 3b, 4, 5, 6
Habit
Clump-Forming
Upright/Erect
Plant Size
Minimum Height
60.00 cm2,500.00 cm
0
3900
👆🏻
Minimum Width
120.00 cm100.00 cm
0
6350
👆🏻
Plant Color
Flower Color
Light Yellow, Ivory
Green, Purple
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
-
Green, Tan
Leaf Color in Spring
Green, Purple, Burgundy
Green
Leaf Color in Summer
Green, Purple
Green
Leaf Color in Fall
Green, Purple
Yellow, Light Yellow
Leaf Color in Winter
-
-
Shape
Leaf Shape
Round
Pinnate
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall
Spring, Summer, Fall
Growing Conditions
Sunlight
Partial shade, Full Shade
Full Sun
Growth Rate
Fast
Fast
Type of Soil
Clay, Loam, Sand
Clay, Loam
The pH of Soil
Acidic, Neutral, Alkaline
Neutral, Alkaline
Soil Drainage
Poorly Drained
Well drained
Bloom Time
Early Spring, Late Winter
Spring
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Wet Site
-
Where to Plant?
Ground
Ground
How to Plant?
By dividing rhizomes, tubers
Seedlings, Transplanting
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Requires consistently moist soil
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
Neutral, Alkaline
Soil Type
Clay, Loam, Sand
Clay, Loam
Soil Drainage Capacity
Poorly Drained
Well drained
Sun Exposure
Partial shade, Full Shade
Full Sun
Pruning
Remove damaged leaves, Remove dead branches, Remove dead leaves
Remove damaged leaves, Remove dead branches, Remove dead leaves
Fertilizers
All-Purpose Liquid Fertilizer
All-Purpose Liquid Fertilizer
Pests and Diseases
Red blotch
Red blotch
Plant Tolerance
Drought
-
Flowers
Showy
Insignificant
Flower Petal Number
-
-
Fruits
Showy Fruit
✔
✘
✔
✘
Edible Fruit
✔
✘
✔
✘
Fragrance
Fragrant Flower
✔
✘
✔
✘
Fragrant Fruit
✔
✘
✔
✘
Fragrant Leaf
✔
✘
✔
✘
Fragrant Bark/Stem
✔
✘
✔
✘
Showy Foliage
✔
✘
✔
✘
Showy Bark
✔
✘
✔
✘
Foliage Texture
Bold
Medium
Foliage Sheen
Glossy
Matte
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
-
Birds
Allergy
-
-
Uses
Aesthetic Uses
Ground Cover
-
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification
Air purification, Shadow Tree
Plant Benefits
Medicinal Uses
Asthma, Chronic fatigue
-
Part of Plant Used
Leaves, Seeds, Stem
Inner Bark, Seeds
Other Uses
Used as Ornamental plant
Used as a dye, Used for woodware, Wood is used in construction
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Bog Garden, Container, Water Gardens
Shade Trees, Street Trees
Botanical Name
PETASITES japonicus 'Purpureus'
FRAXINUS quadrangulata
Common Name
Giant Butterbur, Japanese Butterbur, Purple Butterbur
Blue Ash
In Hindi
Purple Butterbur
Blue Ash plant
In German
Lila Pestwurz
Blue Ash Pflanze
In French
Violet Butterbur
usine Blue Ash
In Spanish
púrpura petasita
planta de Blue Ash
In Greek
Purple Butterbur
φυτό Blue Ash
In Portuguese
roxo Carrapicho
planta Blue Ash
In Polish
Purpurowy Lepiężnik
Blue Ash roślin
In Latin
Purple Butterbur
Blue Ash herba
Kingdom
Plantae
Plantae
Phylum
Magnoliophyta
Magnoliophyta
Class
Magnoliopsida
Magnoliopsida
Order
Asterales
Scrophulariales
Family
Asteraceae
Oleaceae
Genus
Petasites
Fraxinus
Clade
Angiosperms, Asterids, Eudicots
Angiosperms, Asterids, Eudicots
Tribe
Senecioneae
Oleeae
Subfamily
-
-
Number of Species
1565
1
27800
👆🏻