Life Span
Perennial
Perennial
Type
Flowering Plants
Perennial
Origin
South-Central United States
Eastern Europe, Russia, Siberia
Types
Penstemon digitalis, Penstemon barbatus, Penstemon heterophyllus
-
Number of Varieties
20010
0
40000
👆🏻
Habitat
Rocky areas
Grassland, Pastures, Swamps
USDA Hardiness Zone
5-83-8
0
99
👆🏻
AHS Heat Zone
12-1
9-1
Sunset Zone
No Available
A2, A3, 1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23
Habit
Clump-Forming
Clump-Forming
Plant Size
Minimum Height
30.00 cm90.00 cm
0
3900
👆🏻
Minimum Width
30.50 cm60.00 cm
0
6350
👆🏻
Plant Color
Flower Color
White, Purple
Blue Violet
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
-
-
Leaf Color in Spring
Green
Green
Leaf Color in Summer
Green
Green
Leaf Color in Fall
Green
Green
Leaf Color in Winter
-
Light Green
Shape
Leaf Shape
Long linear and narrow
Long Narrow
Thorns
✔
✘
✔
✘
Plant Season
-
Summer
Growing Conditions
Sunlight
Full Sun, Partial Sun
Full Sun, Partial Sun, Partial shade
Growth Rate
Medium
Fast
Type of Soil
Loam
Clay, Loam, Sand
The pH of Soil
Neutral, Alkaline
Acidic, Neutral, Alkaline
Soil Drainage
Well drained
Average
Bloom Time
Late Spring
Early Summer, Summer
Repeat Bloomer
✔
✘
✔
✘
Tolerances
-
Drought
Where to Plant?
Ground
Ground
How to Plant?
From bulbs
Seedlings
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Requires watering in the growing season
Keep the ground moist but not water-logged, 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
Acidic, Neutral, Alkaline
Soil Type
Loam
Clay, Loam, Sand
Soil Drainage Capacity
Well drained
Average
Sun Exposure
Full Sun, Partial Sun
Full Sun, Partial Sun, Partial shade
Pruning
Remove damaged leaves
Remove damaged leaves, Remove dead leaves
Fertilizers
All-Purpose Liquid Fertilizer
All-Purpose Liquid Fertilizer
Pests and Diseases
Red blotch
Red blotch
Plant Tolerance
Drought
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
Medium
Medium
Foliage Sheen
Matte
Matte
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Hummingbirds, Butterflies
Butterflies
Allergy
-
-
Uses
Aesthetic Uses
Showy Purposes
Beautification, Bouquets, Landscape Designing, Showy Purposes
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification
Air purification
Plant Benefits
Medicinal Uses
-
-
Part of Plant Used
Flowers, Leaves
Flowers, Leaves
Other Uses
Showy Purposes, Used as Ornamental plant
Decoration Purposes, Showy Purposes, Used as Ornamental plant
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Bedding Plant, Rock Garden / Wall, Wildflower
Cutflower, Feature Plant, Foundation, Mixed Border
Botanical Name
PENSTEMON cobaea
IRIS sibirica 'Caesar's Brother'
Common Name
Beardtongue
Siberian Iris
In Hindi
Beardtongue
Caesar's Brother Siberian Iris
In German
Bartfaden
Caesars Bruder Sibirische Iris
In French
beardtongue
Frère Iris de Sibérie de César
In Spanish
beardtongue
De César Hermano Siberian Iris
In Greek
Beardtongue
Καίσαρα Αδελφός Σιβηρίας Iris
In Portuguese
Beardtongue
Irmão de César Siberian Iris
In Polish
Beardtongue
Cezara Brat syberyjski Iris
In Latin
ursus lingua
Caesaris Frater Siberian Iris
Kingdom
Plantae
Plantae
Phylum
Tracheophyta
-
Class
Equisetopsida
Liliopsida
Order
Lamiales
Asparagales
Family
Scrophulariaceae
Iridaceae
Genus
Penstemon
Abelia
Clade
Angiosperms, Asterids, Eudicots
Angiosperms, Monocots
Tribe
-
-
Subfamily
-
Iridoideae
Number of Species
26135
1
27800
👆🏻