Juglans nigra Black walnut (Juglandaceae) Deciduous tree

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Juglans nigra
Black walnut
Deciduous tree
(1 Page of 5)

The Juglans nigra plant species is found in Eastern N. America - Massachusets to Florida, west to Texas and Minnesota. It is a member of the Juglandaceae family. Common gardeners may know the plant as Black walnut.

Cultivation | Propagation | General Uses
Medicinal | Edible Uses

Latin Name:  Juglans nigra
Common Name:  Black walnut
Family:  Juglandaceae
Author:  L.

Known Hazards:  None known

Mature Height:  30   Mature Width:  20

Habitat:  Rich fertile woods and hillsides[43, 82] in deep well-drained soils[229].

General Uses: A brown dye is obtained from the nuts, husks and bark[14, 57, 101, 159]. It does not require a mordant[169]. The husks can be dried for later use[169]. A brown dye is obtained from the leaves and stems[168]. It does not require a mordant[168]. The dye turns black if it is prepared in an iron pot[168]. The leaves can be dried for later use[169]. The husks are rich in tannin[226]. The husks can be made into a high quality coal (does the report mean charcoal?[K]) and is then used as a filter[226]. It was used in gas masks[226]. The leaves repel fleas and have been used as a strewing herb[20, 201, 257]. They are also used as an insecticide against bed bugs[222]. The ground up husks are also insecticidal[226]. The leaves produce substances that depress the growth of other plants. These substances are washed onto the ground by rain and inhibit the growth of plants beneath the tree[18, 20, 159]. The roots also produce substances that are toxic to many plant species, especially apples (Malus species), members of the Ericaceae, Potentilla spp and the white pines (certain Pinus spp.)[200]. An alternative ingredient of 'QR' herbal compost activator[32]. This is a dried and powdered mixture of several herbs that can be added to a compost heap in order to speed up bacterial activity and thus shorten the time needed to make the compost[K]. Wood - very ornamental heavy, hard, strong, close-grained, very durable. Easily worked, it glues well, does not warp, shrink or swell much and takes a good polish. It weighs 38lb per cubic foot. A very valuable timber tree and possibly the most sought after wood in N. America, it is used in cabinet making, ship building, veneer etc[1, 46, 61, 82, 101, 149, 227, 229, 235].

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Cultivation | Propagation | General Uses
Medicinal | Edible Uses

The information above has been supplied solely via the hard work and dedication of the team at 'Plants for a Future'.
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