Life Span
Perennial
Perennial
Type
Flowering Plants
Broadleaf Evergreen
Origin
South-Central United States
-
Types
Penstemon digitalis, Penstemon barbatus, Penstemon heterophyllus
Rhododendron, Azalea indica, Azalea japonica
Number of Varieties
20010
0
40000
👆🏻
Habitat
Rocky areas
Forests
USDA Hardiness Zone
5-88-11
0
99
👆🏻
AHS Heat Zone
12-1
-
Sunset Zone
No Available
21,22
Habit
Clump-Forming
Oval or Rounded
Plant Size
Minimum Height
30.00 cm60.00 cm
0
3900
👆🏻
Minimum Width
30.50 cm90.00 cm
0
6350
👆🏻
Plant Color
Flower Color
White, Purple
Red
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
-
-
Leaf Color in Spring
Green
Green, Dark Green
Leaf Color in Summer
Green
Green, Dark Green
Leaf Color in Fall
Green
Green, Dark Green
Leaf Color in Winter
-
Green, Dark Green
Shape
Leaf Shape
Long linear and narrow
Linear
Thorns
✔
✘
✔
✘
Plant Season
-
Spring, Summer, Fall, Winter
Growing Conditions
Sunlight
Full Sun, Partial Sun
Full Sun, Partial Sun, Partial shade
Growth Rate
Medium
Medium
Type of Soil
Loam
Loam, Sand
The pH of Soil
Neutral, Alkaline
Acidic
Soil Drainage
Well drained
Well drained
Bloom Time
Late Spring
Early Spring, Spring, Late Fall, Winter, Late Winter
Repeat Bloomer
✔
✘
✔
✘
Tolerances
-
-
Where to Plant?
Ground
Ground
How to Plant?
From bulbs
Seedlings, Stem Cutting
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Requires watering in the growing season
Average Water Needs, Do not water frequently
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
Neutral, Alkaline
Acidic
Soil Type
Loam
Loam, Sand
Soil Drainage Capacity
Well drained
Well drained
Sun Exposure
Full Sun, Partial Sun
Full Sun, Partial Sun, Partial shade
Pruning
Remove damaged leaves
Remove damaged leaves, Remove dead branches, Remove dead leaves
Fertilizers
All-Purpose Liquid Fertilizer
All-Purpose Liquid Fertilizer, Apply N-P-K
Pests and Diseases
Red blotch
Caterpillars, Citrus leaf miner, Petal blight, Red blotch, Rust, Twig blight, Whiteflies
Plant Tolerance
Drought
Drought, Shade areas
Flowers
Showy
Showy
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
Medium
Foliage Sheen
Matte
Matte
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Hummingbirds, Butterflies
Onion thrips, White Pine Weevil
Allergy
-
-
Uses
Aesthetic Uses
Showy Purposes
Bonsai, Cottage Garden
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification
Air purification
Plant Benefits
Medicinal Uses
-
Astringent
Part of Plant Used
Flowers, Leaves
Flowers, Leaves
Other Uses
Showy Purposes, Used as Ornamental plant
Repellent, used for making charcoal, Used for woodware
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Bedding Plant, Rock Garden / Wall, Wildflower
Container, Feature Plant, Foundation, Mixed Border, Rock Garden, Wall, Topiary, Bonsai, Espalier
Botanical Name
PENSTEMON cobaea
RHODODENDRON 'Anthopogon'
Common Name
Beardtongue
Evergreen Azalea
In Hindi
Beardtongue
Azalea
In German
Bartfaden
Azalee
In French
beardtongue
azalée
In Spanish
beardtongue
azalea
In Greek
Beardtongue
αζάλεα
In Portuguese
Beardtongue
Azalea
In Polish
Beardtongue
azalia
In Latin
ursus lingua
Azalea
Kingdom
Plantae
Plantae
Phylum
Tracheophyta
Tracheophyta
Class
Equisetopsida
Magnoliopsida
Order
Lamiales
Ericales
Family
Scrophulariaceae
Ericaceae
Genus
Penstemon
Rhododendron
Clade
Angiosperms, Asterids, Eudicots
Angiosperms, Asterids, Eudicots
Tribe
-
Rhodoreae
Subfamily
-
Ericoideae
Number of Species
2611024
1
27800
👆🏻