Life Span
Perennial
Perennial
Type
Flowering Plants
Tree
Origin
South-Central United States
United States, California
Types
Penstemon digitalis, Penstemon barbatus, Penstemon heterophyllus
-
Number of Varieties
2008
0
40000
👆🏻
Habitat
Rocky areas
Woodland Garden Canopy
USDA Hardiness Zone
5-86-9
0
99
👆🏻
AHS Heat Zone
12-1
9-1
Sunset Zone
No Available
3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Habit
Clump-Forming
Spreading
Plant Size
Minimum Height
30.00 cm1,520.00 cm
0
3900
👆🏻
Minimum Width
30.50 cm1,370.00 cm
0
6350
👆🏻
Plant Color
Flower Color
White, Purple
Red, Yellow green
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
-
-
Leaf Color in Spring
Green
Green, Blue Green
Leaf Color in Summer
Green
Green, Blue Green
Leaf Color in Fall
Green
Yellow, Orange, Pink
Leaf Color in Winter
-
-
Shape
Leaf Shape
Long linear and narrow
Irregular
Thorns
✔
✘
✔
✘
Plant Season
-
Spring, Summer, Fall, Winter
Growing Conditions
Sunlight
Full Sun, Partial Sun
Full Sun, Partial Sun
Growth Rate
Medium
Slow
Type of Soil
Loam
-
The pH of Soil
Neutral, Alkaline
-
Soil Drainage
Well drained
-
Bloom Time
Late Spring
Spring
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
Average Water Needs
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
Neutral, Alkaline
-
Soil Type
Loam
-
Soil Drainage Capacity
Well drained
-
Sun Exposure
Full Sun, Partial Sun
Full Sun, Partial Sun
Pruning
Remove damaged leaves
Remove damaged leaves, Remove dead branches, Remove dead leaves, Remove dead or diseased plant parts
Fertilizers
All-Purpose Liquid Fertilizer
All-Purpose Liquid Fertilizer
Pests and Diseases
Red blotch
Red blotch
Plant Tolerance
Drought
Drought
Flowers
Showy
Insignificant
Flower Petal Number
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
-
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Hummingbirds, Butterflies
Birds
Allergy
-
Pollen
Uses
Aesthetic Uses
Showy Purposes
Borders
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification
Air purification, Shadow Tree, soil erosion prevension on hill slopes, Wildlife, Windbreak
Plant Benefits
Medicinal Uses
-
Astringent, Diarrhea, Dysentry, Haemorrhages, Poultice, Sore Eyes, Sore throat
Part of Plant Used
Flowers, Leaves
Leaves, Seeds, Wood
Other Uses
Showy Purposes, Used as Ornamental plant
Adhesive, Basketary, Buttons, Repellent, Tannin, Used as fuel, Used for woodware
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Bedding Plant, Rock Garden / Wall, Wildflower
Feature Plant, Shade Trees, Street Trees
Botanical Name
PENSTEMON cobaea
QUERCUS douglasii
Common Name
Beardtongue
Blue Oak
In Hindi
Beardtongue
Blue Oak Tree
In German
Bartfaden
Blaue Eiche
In French
beardtongue
Bleu Oak Tree
In Spanish
beardtongue
Azul del árbol de roble
In Greek
Beardtongue
Μπλε Oak Tree
In Portuguese
Beardtongue
Carvalho azul
In Polish
Beardtongue
Niebieski Oak Tree
In Latin
ursus lingua
Blue quercum ligno
Kingdom
Plantae
Plantae
Phylum
Tracheophyta
Magnoliophyta
Class
Equisetopsida
Magnoliopsida
Order
Lamiales
Fagales
Family
Scrophulariaceae
Fagaceae
Genus
Penstemon
Quercus
Clade
Angiosperms, Asterids, Eudicots
Angiosperms, Eudicots, Rosids
Tribe
-
-
Subfamily
-
-
Number of Species
26120
1
27800
👆🏻