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Black Locust

Robinia pseudoacacia

Trail Number:
C26

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Description

Family:
Fabaceae

Foliage:
Leave are alternate pinnately compound and up to 14 inches long. Leaf scars sport paired thorns 1/4 to 1/2 inches long

Native Locale:
Pennsylvania to Georgia, west to Iowa, Missouri, and Oklahoma

Mature Height:
30 to 50 feet; 70 to 80 feet possible

Mature Width:
20 to 35 feet

Hardiness Zones:
Zone 4 to 8(9)

Soil Preference:
Extremely adaptable to varied soils and climates; Prefers moist, rich, loamy soils or those of limestone origin

Growth Habit:
Often an upright tree with a straight trunk and a narrow oblong crown, becoming ragged and scraggly with age; will develop thickets as it freely seeds and develops shoots from roots

Rate of Growth:
Fast, will average 2' or greater per year over a 10 year period

Disease and Insect:
Canker, dampening-off, leaf spots, powdery mildews, wood decay, witches broom, locust borer, carpenter worm, locust leaf miner, locust twig borer, and scales

Landscape Value:
n/a

Additional Notes:

  • Fruit: Pod
  • Spreads easily from seed and from root shoots. Tough tree, bees like the flowers, but not for most landscapes.

Photos

Summer '08 - Black LocustSummer '08 Leaf - Black Locust