Life Span
Perennial
Perennial
Type
Flowering Plants
Fruit
Origin
South-Central United States
Asia
Types
Penstemon digitalis, Penstemon barbatus, Penstemon heterophyllus
Avalon Lemon, Bears Lemon, Buddha's Hand, Bush Lemon, Citron
Number of Varieties
20050
0
40000
👆🏻
Habitat
Rocky areas
Mixed deciduous forest, Tropical regions
USDA Hardiness Zone
5-89-12
0
99
👆🏻
AHS Heat Zone
12-1
12-1
Sunset Zone
No Available
H1, H2, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Habit
Clump-Forming
Oval or Rounded
Plant Size
Minimum Height
30.00 cm120.00 cm
0
3900
👆🏻
Minimum Width
30.50 cm150.00 cm
0
6350
👆🏻
Plant Color
Flower Color
White, Purple
White
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
-
Yellow, Lemon yellow
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
Oval
Thorns
✔
✘
✔
✘
Plant Season
-
Spring, Summer, Fall, Winter
Growing Conditions
Sunlight
Full Sun, Partial Sun
Full Sun, Partial Sun
Growth Rate
Medium
Medium
Type of Soil
Loam
Loam, Sand
The pH of Soil
Neutral, Alkaline
Acidic, Neutral
Soil Drainage
Well drained
Well drained
Bloom Time
Late Spring
Indeterminate
Repeat Bloomer
✔
✘
✔
✘
Tolerances
-
Drought
Where to Plant?
Ground
Container, 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, occasional watering once established
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
Soil Type
Loam
Loam, Sand
Soil Drainage Capacity
Well drained
Well drained
Sun Exposure
Full Sun, Partial Sun
Full Sun, Partial Sun
Pruning
Remove damaged leaves
Generally pruned to waist height, pruning needed for strong structure, Remove damaged leaves, Remove dead branches, Remove dead leaves
Fertilizers
All-Purpose Liquid Fertilizer
All-Purpose Liquid Fertilizer, Doesn't require fertilization when grown in rich soil
Pests and Diseases
Red blotch
Aphids, Grasshoppers, Leafminers, Red blotch, Rust, Snails
Plant Tolerance
Drought
Drought, Drought and Salt
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
Glossy
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Hummingbirds, Butterflies
Birds, Butterflies
Allergy
-
Diarrhea, Hyperacidity, Sore Throat, Whooping Cough
Uses
Aesthetic Uses
Showy Purposes
Cottage Garden
Beauty Benefits
-
Glowing Skin, Maintains teeth healthy, Making cosmetics, Nourishes scalp, Perfumes, Skin inflammation
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification
Air purification, Fixes Nitrogen, Insect Repellent, soil stabilisation
Plant Benefits
Medicinal Uses
-
Acne, Antibacterial, Antirheumatic, Appetizer, Bone strength, Digestion problems, Hangover, Healthy teeth, Nutrients, Obesity, Oral health, Skin irritation
Part of Plant Used
Flowers, Leaves
Bark, Fruits, Leaf Stalks, Leaves
Other Uses
Showy Purposes, Used as Ornamental plant
Air freshner, Biomass for fuel, Can be made into a herbal tea, Leaves are used as mosquito repellent, Making Perfumes, Preferably used as black tea, Used as a nutritious food item
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Bedding Plant, Rock Garden / Wall, Wildflower
Container, Edible, Fruit / Fruit Tree, Hedges, Houseplant, Mixed Border, Topiary / Bonsai / Espalier, Tropical
Botanical Name
PENSTEMON cobaea
CITRUS limon
Common Name
Beardtongue
Lemon
In Hindi
Beardtongue
नींबू
In German
Bartfaden
Citrone or Limone or Zitrone
In French
beardtongue
Citron or Citronnier
In Spanish
beardtongue
Limón or Limonero
In Greek
Beardtongue
Λεμόνι [Lemóni]
In Portuguese
Beardtongue
Limão
In Polish
Beardtongue
Cytrynowy
In Latin
ursus lingua
Limon
Kingdom
Plantae
Plantae
Phylum
Tracheophyta
Magnoliophyta
Class
Equisetopsida
Magnoliopsida
Order
Lamiales
Sapindales
Family
Scrophulariaceae
Rutaceae
Genus
Penstemon
Citrus
Clade
Angiosperms, Asterids, Eudicots
Rosids
Tribe
-
-
Subfamily
-
-
Number of Species
26150
1
27800
👆🏻