Robinia hispida

Bristle Locust

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Deciduous shrub native to Eastern North America, featuring fragrant rose-pink flower clusters and distinctively spiny stems. Ideal for naturalized gardens.
yard Outdoor plants wb_sunny Shade / Half-shade pets Not pet-safe
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Plant Details

Common Name Bristle Locust
Family Fabaceae
Genus Robinia
Species Hispida
Origin United States (Eastern North America)
Blooming Late Spring to Early Summer, fragrant pink flowers.
Leaf Color Green (turns yellow in Autumn)
Sunlight Shade / Half-shade
Category Outdoor plants
Pet Friendly close No
yard

Care & Maintenance

terrain
Soil

Well-drained, average to clay loam. Tolerates poor soils and drought once established.

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Watering

Water regularly during establishment phase (first year). Highly drought tolerant thereafter.

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Sunlight & Care

Requires full sun for best flowering and growth. Tolerates partial shade but blooms less effectively.

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Fertilization

Generally does not require fertilization due to nitrogen-fixing root nodules. Avoid high nitrogen which reduces blooming.

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Pruning

Prune after flowering in spring or late winter to remove dead/weak wood and control size.

Pest Control Aphid Caterpillar Leaf Miner Spotted Lanternfly

These are the insects and pathogens that commonly interact with this plant, including pests, parasites, and organisms typically associated with its care.

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Seasonal Periods

local_florist Flowering Period 2 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 8 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
-31° – 104°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
20% – 80%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
10000 – 60000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
2000 – 3500
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
10% – 65%
% volumetric
Water content in the growing medium
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Soil EC
300 – 1000
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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