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How to Grow and Care for Black walnut

Black walnut, also known as American Black Walnut, Eastern Black Walnut, American walnut, Eastern american black walnut

Black walnut is a large deciduous tree known for its valuable wood and edible nuts. Special care points include its allelopathic properties, which inhibit the growth of certain plants nearby due to the juglone compound it secretes. It requires well-drained soil and sufficient space to accommodate its extensive root system. Given these considerations, black walnut is generally regarded as difficult to care for in landscape settings due to its specific growing requirements and the potential impact on surrounding vegetation.

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Watering schedule: Every 1-2 weeks

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Sunlight Requirements: Full sun

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Toxic to Human & Pets

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Planting and Growing Black walnut

ToughnessHigh
Care LevelLow
Care DifficultyHard
LifespanPerennial
Watering ScheduleEvery 1-2 weeks
Sunlight RequirementsFull sun
Soil pH6-7.5
Planting TimeSpring, Fall
Hardiness Zones
4-10
ToxicityToxic to Human & Pets
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The Toxicity of Black walnut

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More General Info About Black walnut

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Black walnut features compound leaves with 15-23 finely toothed leaflets, each 2-4 inches (5-10 cm) long. Its bark is dark grey to black, with deep furrows and narrow ridges forming a diamond pattern. The tree is notable for its large round fruits, 1-2 inches (2.5-5 cm) in diameter, encased in green, semi-fleshy husks that turn black upon ripening. The mature tree's stature is robust, reaching heights of 70-100 feet (21-30 meters) with a trunk diameter of 2-4 feet (0.6-1.2 meters).
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