How to Grow and Care for Black locust

Black locust, also known as False acacia, Locust tree

Black locust is a resilient and hardy plant, known for its adaptability to various soil conditions and ability to tolerate drought. Its basic care needs include full sun exposure and well-drained soil for optimal growth. Special care points involve ensuring that black locust is not located where its robust root system might damage structures or become invasive. Regular pruning is recommended to maintain its shape and prevent excessive spreading.

Watering schedule: Every 1-2 weeks

Sunlight Requirements: Full sun

Toxic to Human & Pets

In This Article

Planting and Growing Black locust

Toughness	High
Care Level	Low
Care Difficulty	Easy
Lifespan	Perennial
Watering Schedule	Every 1-2 weeks
Sunlight Requirements	Full sun
Soil pH	6-7.5
Planting Time	Spring, Fall
Hardiness Zones	3-11
Toxicity	Toxic to Human & Pets

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Varieties of Black locust

Black locust 'Hillieri'

Black locust 'Hillieri' is a decorative rose acacia tree, it was planted in hillier's nursery in the 1930s. In spring and summer, it produces fragrant pink flowers which attract many different pollinators. It enjoys full sun but should be sheltered from strong winds particularly when young.

Common Pests & Diseases

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The Toxicity of Black locust

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More General Info About Black locust

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Black locust reaches a mature height of approximately 30 to 50 feet (9 to 15 meters) with a spread of 20 to 35 feet (6 to 10.5 meters). It features a sturdy trunk up to 3 to 4 feet (90 to 120 cm) in diameter. The bark is characteristically brown to gray, deeply furrowed, and scaly. Leaves are dark blue-green, alternate, and pinnately compound with up to 23 lanceolate or ovate leaflets. From April to June, it showcases fragrant white, pea-like flowers clustered 5 to 8 inches (13 to 20 cm) long. Following blooming, it produces smooth, flat, purple-brown seed pods that can measure up to 4 inches (10 cm) and may remain on the tree into winter.