Robinia pseudoacacia

Black Locust

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Deciduous tree native to North America, known for rapid growth and nitrogen-fixing capabilities. Features fragrant white flowers and thorny branches.
yard Outdoor plants wb_sunny Half-shade / Sun pets Not pet-safe
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Plant Details

Common Name Black Locust
Family Fabaceae
Genus Robinia
Species Pseudoacacia
Origin United States (Eastern)
Blooming Spring (May-June), fragrant white racemes
Leaf Color Light green to blue-green, turning yellow in autumn
Sunlight Half-shade / Sun
Category Outdoor plants
Pet Friendly close No
yard

Care & Maintenance

terrain
Soil

Well-draining, adaptable soil; tolerates poor conditions. Loam or sandy loam preferred.

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Watering

Drought tolerant once established. Water regularly during establishment phase. Reduce in winter dormancy.

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Sunlight & Care

Full Sun required for best growth and flowering. Tolerates partial shade but blooms less.

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Fertilization

Low fertilizer needs due to nitrogen-fixing roots. Avoid high nitrogen fertilizers.

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Pruning

Prune young trees to develop structure. Remove deadwood and suckers in late winter.

Pest Control Aphid Locust Borer Scale Insect Spider Mite

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 12 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
-13° – 100°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
10% – 90%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
30000 – 100000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
1200 – 2500
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
10% – 70%
% volumetric
Water content in the growing medium
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Soil EC
300 – 1800
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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