Life Span
Annual
Perennial
Type
Sedge or Rush
Flowering Plants
Origin
Southern Europe, United Kingdom, Northern Africa
South-Central United States
Types
-
Penstemon digitalis, Penstemon barbatus, Penstemon heterophyllus
Number of Varieties
20200
0
40000
👆🏻
Habitat
Grassland, Humid climates, Riverbanks, Wet forest
Rocky areas
USDA Hardiness Zone
8-115-8
0
99
👆🏻
AHS Heat Zone
11-1
12-1
Sunset Zone
7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
No Available
Habit
Arching/Fountain-shaped
Clump-Forming
Plant Size
Minimum Height
15.20 cm30.00 cm
0
3900
👆🏻
Minimum Width
45.70 cm30.50 cm
0
6350
👆🏻
Plant Color
Flower Color
White
White, Purple
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
Linear
Long linear and narrow
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
-
Growing Conditions
Sunlight
Full Sun, Partial Sun, Partial shade
Full Sun, Partial Sun
Growth Rate
Slow
Medium
Type of Soil
Loam
Loam
The pH of Soil
Neutral
Neutral, Alkaline
Soil Drainage
Poorly Drained
Well drained
Bloom Time
Indeterminate
Late Spring
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Drought
-
Where to Plant?
Container, Ground, Pot
Ground
How to Plant?
Seedlings, Stem Planting
From bulbs
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Keep the ground moist but not water-logged, Requires regular watering, Water when soil is dry
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
Neutral, Alkaline
Soil Type
Loam
Loam
Soil Drainage Capacity
Poorly Drained
Well drained
Sun Exposure
Full Sun, Partial Sun, Partial shade
Full Sun, Partial Sun
Pruning
Remove damaged leaves, Remove dead branches, Remove dead leaves
Remove damaged 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
Fine
Medium
Foliage Sheen
Glossy
Matte
Evergreen
✔
✘
✔
✘
Invasive
Sometimes
-
Self-Sowing
✔
✘
✔
✘
Attracts
Insects
Hummingbirds, Butterflies
Allergy
Asthma, Skin irritation
-
Uses
Aesthetic Uses
Beautification
Showy Purposes
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification
Air purification
Plant Benefits
Medicinal Uses
Digestion problems, Fever
-
Part of Plant Used
Whole plant
Flowers, Leaves
Other Uses
Showy Purposes, Used as Ornamental plant
Showy Purposes, Used as Ornamental plant
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Bog Garden, Container, Edging, Rock Garden / Wall
Bedding Plant, Rock Garden / Wall, Wildflower
Botanical Name
ISOLEPIS cernua
PENSTEMON cobaea
Common Name
Low Bulrush
Slender Clubrush
Beardtongue
In Hindi
फाइबर ऑप्टिक घास
Beardtongue
In German
Lichtwellenleiter-Gras
Bartfaden
In French
Fibre optique Herbe
beardtongue
In Spanish
Hierba de fibra óptica
beardtongue
In Greek
Οπτικών Ινών Grass
Beardtongue
In Portuguese
Fibra Óptica Relva
Beardtongue
In Polish
Światłowody Trawa
Beardtongue
In Latin
Fiber opticus Grass
ursus lingua
Kingdom
Plantae
Plantae
Phylum
-
Tracheophyta
Class
-
Equisetopsida
Order
Poales
Lamiales
Family
Cyperaceae
Scrophulariaceae
Genus
Isolepis
Penstemon
Clade
Angiosperms, Commelinids, Monocots
Angiosperms, Asterids, Eudicots
Tribe
-
-
Subfamily
Pooideae
-
Number of Species
70261
1
27800
👆🏻