 | Black Walnut, American Black Walnut, Eastern Black Walnut Juglans nigra Juglandaceae Black walnut grows on deep, rich, moist limestone soils. It is found in east, north central and central Texas in bottomland floodplains, field edges and along streams. During droughts in the Blackland Prairie, which normally averages 35 inches of rain a year, it can suffer massive limb die-off, so it has a fairly high moisture requirement. Walnut roots and leaves secrete a chemical known as "juglone," which can inhibit growth of some plant species around it. Walnut wood is much desired for furniture and veneer. Plant Habit or Use: large tree Exposure: sun Flower Color: greenish Blooming Period: spring Fruit Characteristics: large, round nut encased in husk Height: to 80 ft. Width: 40 to 50 ft. Plant Character: deciduous Heat Tolerance: high medium Water Requirements: high medium Soil Requirements: alkaline Additional Comments:
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