Life Span
Perennial
Annual
Type
Flowering Plants
Sedge or Rush
Origin
South-Central United States
Southern Europe, United Kingdom, Northern Africa
Types
Penstemon digitalis, Penstemon barbatus, Penstemon heterophyllus
-
Number of Varieties
20020
0
40000
👆🏻
Habitat
Rocky areas
Grassland, Humid climates, Riverbanks, Wet forest
USDA Hardiness Zone
5-88-11
0
99
👆🏻
AHS Heat Zone
12-1
11-1
Sunset Zone
No Available
7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Habit
Clump-Forming
Arching/Fountain-shaped
Plant Size
Minimum Height
30.00 cm15.20 cm
0
3900
👆🏻
Minimum Width
30.50 cm45.70 cm
0
6350
👆🏻
Plant Color
Flower Color
White, Purple
White
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
-
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
Slow
Type of Soil
Loam
Loam
The pH of Soil
Neutral, Alkaline
Neutral
Soil Drainage
Well drained
Poorly Drained
Bloom Time
Late Spring
Indeterminate
Repeat Bloomer
✔
✘
✔
✘
Tolerances
-
Drought
Where to Plant?
Ground
Container, Ground, Pot
How to Plant?
From bulbs
Seedlings, Stem Planting
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, Water when soil is dry
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
Neutral, Alkaline
Neutral
Soil Type
Loam
Loam
Soil Drainage Capacity
Well drained
Poorly 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
Pests and Diseases
Red blotch
Red blotch
Plant Tolerance
Drought
Drought
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
Fine
Foliage Sheen
Matte
Glossy
Evergreen
✔
✘
✔
✘
Invasive
-
Sometimes
Self-Sowing
✔
✘
✔
✘
Attracts
Hummingbirds, Butterflies
Insects
Allergy
-
Asthma, Skin irritation
Uses
Aesthetic Uses
Showy Purposes
Beautification
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification
Air purification
Plant Benefits
Medicinal Uses
-
Digestion problems, Fever
Part of Plant Used
Flowers, Leaves
Whole plant
Other Uses
Showy Purposes, Used as Ornamental plant
Showy Purposes, Used as Ornamental plant
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Bedding Plant, Rock Garden / Wall, Wildflower
Bog Garden, Container, Edging, Rock Garden / Wall
Botanical Name
PENSTEMON cobaea
ISOLEPIS cernua
Common Name
Beardtongue
Low Bulrush
Slender Clubrush
In Hindi
Beardtongue
फाइबर ऑप्टिक घास
In German
Bartfaden
Lichtwellenleiter-Gras
In French
beardtongue
Fibre optique Herbe
In Spanish
beardtongue
Hierba de fibra óptica
In Greek
Beardtongue
Οπτικών Ινών Grass
In Portuguese
Beardtongue
Fibra Óptica Relva
In Polish
Beardtongue
Światłowody Trawa
In Latin
ursus lingua
Fiber opticus Grass
Kingdom
Plantae
Plantae
Phylum
Tracheophyta
-
Class
Equisetopsida
-
Order
Lamiales
Poales
Family
Scrophulariaceae
Cyperaceae
Genus
Penstemon
Isolepis
Clade
Angiosperms, Asterids, Eudicots
Angiosperms, Commelinids, Monocots
Tribe
-
-
Subfamily
-
Pooideae
Number of Species
26170
1
27800
👆🏻