Life Span
Perennial
Perennial
Type
Tree
Flowering Plants
Origin
-
North-Central United States, Central United States, Western United States, Texas
Types
Honey Locust
Blue Toadflax, Old-Field Toadflax
Number of Varieties
1030
0
40000
👆🏻
Habitat
Woodland Garden Canopy
Cultivated Beds
USDA Hardiness Zone
5-83-9
0
99
👆🏻
AHS Heat Zone
9-3
9-1
Sunset Zone
2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
1a, 1b, 2a, 2b, 3a, 3b, 10
Habit
Upright/Erect
Upright/Erect
Plant Size
Minimum Height
1,524.00 cm61.00 cm
0
3900
👆🏻
Minimum Width
1,066.80 cm25.40 cm
0
6350
👆🏻
Plant Color
Flower Color
Rose, Violet
Pink, Light Blue, Lavender
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
Purple, Brown
-
Leaf Color in Spring
Red, Crimson, Bronze
Light Green, Blue Green, Gray Green
Leaf Color in Summer
Green, Blue Green
Blue Green, Gray Green
Leaf Color in Fall
Yellow green
Blue Green, Gray Green
Leaf Color in Winter
-
-
Shape
Leaf Shape
Pinnate
Oval to egg shaped
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
Spring, Summer
Growing Conditions
Sunlight
Full Sun
Full Sun, Partial Sun
Growth Rate
Fast
Fast
Type of Soil
Clay, Loam, Sand
Clay, Loam
The pH of Soil
Acidic, Neutral, Alkaline
Neutral, Alkaline
Soil Drainage
Average
Well drained
Bloom Time
Spring, Late Spring
Late Spring, Early Summer, Summer
Repeat Bloomer
✔
✘
✔
✘
Tolerances
Pollution, Drought, Salt, Soil Compaction
Drought
Where to Plant?
Ground
Ground
How to Plant?
Seedlings
Cuttings, Divison, Seedlings
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Average Water Needs, Needs a lot of water initially, occasional watering once established
Average Water Needs, Do Not over Water
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
Acidic, Neutral, Alkaline
Neutral, Alkaline
Soil Type
Clay, Loam, Sand
Clay, Loam
Soil Drainage Capacity
Average
Well drained
Sun Exposure
Full Sun
Full Sun, Partial Sun
Pruning
Cut limbs, Prune in winter, Prune up lowest branches, Remove branches, Remove damaged leaves, Remove dead branches, Remove dead leaves
Remove damaged leaves, Remove dead branches, Remove dead leaves
Fertilizers
All-Purpose Liquid Fertilizer, Nitrogen
use all-purpose fertilizers
Pests and Diseases
Red blotch
Foliar disease, Root rot, Spider mites
Plant Tolerance
Drought, Pollution, Salt, Soil Compaction
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
Birds, Butterflies
Bumblebees
Allergy
Abdominal pain, Depression, Diarrhea, Digestive Problems, gastro-intestinal problems, Kidney Disease, Liver disease, Nausea, Vomiting, weakness
Depression, High blood cholestrol, Pain
Uses
Aesthetic Uses
Showy Purposes
Showy Purposes
Beauty Benefits
Good for skin
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification, Shadow Tree, soil stabilisation
Air purification
Plant Benefits
Medicinal Uses
Antispasmodic, Antivinous, Cancer, Cholagogue, Diuretic, Emetic, Emmoiliant, Eye Problems, Febrifuge, Laxative, Purgative, Tonic
Analgesic, Febrifuge, Stomachic
Part of Plant Used
Flowers, Seeds, Wood
Leaves, Root
Other Uses
Fibre, For making oil, Used as a dye, Used as essential oil, Used as fuel, Used for woodware
-
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Feature Plant, Shade Trees, Street Trees
Rock Garden / Wall, Wildflower
Botanical Name
ROBINIA 'Purple Robe'
PENSTEMON grandiflorus
Common Name
Hybrid Black Locust, Purple Robe Locust
Large Beardtongue, Shell-leaf Penstemon, Wild Snapdragon
In Hindi
Black Locust Tree
Wild Snapdragon
In German
Schwarz Locust Tree
Wilde Snapdragon
In French
Noir Arbre Locust
Snapdragon sauvage
In Spanish
Negro del árbol de la langosta
Salvaje Snapdragon
In Greek
Μαύρο Locust Tree
άγρια Snapdragon
In Portuguese
Árvore Locust Preto
Selvagem Snapdragon
In Polish
Robinii akacjowej Drzewo
Dziki Snapdragon
In Latin
Locusta arbor Niger
Phlox Ferae
Kingdom
Plantae
Plantae
Phylum
Magnoliophyta
Magnoliophyta
Class
Magnoliopsida
Magnoliopsida
Order
Fabales
Scrophulariales
Family
Fabaceae
Scrophulariaceae
Genus
Robinia
Penstemon
Clade
Angiosperms, Eudicots, Rosids
Angiosperms, Asterids, Eudicots
Tribe
Robinieae
-
Subfamily
Faboideae
Scrophularioideae
Number of Species
2540
1
27800
👆🏻