Black Walnut

Juglans nigra

Black Walnut

Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Juglandaceae
Genus:
Juglans
Species:
Juglans nigra

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Tree
Height:
More than 40 ft
Light Requirements:
Full Sun, Part Shade
Drought Tolerance:
Medium
Bloom Months:
apr, may
Bloom Colors:
Yellow, Green, Brown
Food Forest:
Plant contains edible parts

Native Range

United States: Alabama, Arkansas, Colorado, Connecticut, District of Columbia, Delaware, Florida, Georgia, Iowa, Illinois, Indiana, Kansas, Kentucky, Louisiana, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, Mississippi, North Carolina, North Dakota, Nebraska, New Hampshire, New Jersey, New Mexico, New York, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Wisconsin, West Virginia, Canada: Manitoba, Ontario, Quebec

Keystone Species Ranking

Caterpillar Keystone:
★☆☆☆☆ Based on number of butterfly and moth species using this genus as host plant (Source: National Wildlife Federation)

Host Plant for Caterpillars

Acrobasis caryivorella, Acrobasis juglanivorella, Acrobasis latifasciella, Acronicta impleta, Afflicted Dagger Moth (Acronicta afflicta), American plum borer (Euzophera semifuneralis), Angus's datana (Datana angusii), Banded Tussock Moth (Halysidota tessellaris), Betrothed Underwing (Catocala innubens), bland caloptilia moth (Caloptilia blandella), Bordered Sallow (Pyrrhia umbra), Brown-tail moth (Euproctis chrysorrhoea), Cacao moth (Ephestia elutella), California underwing (Catocala californica), Caloptilia juglandiella, Carob moth (Ectomyelois ceratoniae), Cecropia moth (Hyalophora cecropia), Cherry Casebearer Moth (Coleophora pruniella), Cinnamon Tussock Moth (Dasychira cinnamomea), Clouded Underwing (Catocala nebulosa), Codling moth (Cydia pomonella), Colocasia propinquilinea, contracted datana (Datana contracta), Cosmet moth (Pyroderces rileyi), Curve-toothed geometer (Eutrapela clemataria), Dichomeris ligulella, Eastern Tent Caterpillar (Malacosoma americana), Eversmann's rustic (Actebia fennica), fall cankerworm (Alsophila pometaria), Fall webworm (Hyphantria cunea), false prominent (Schizura leptinoides), False Underwing Moth (Allotria elonympha), Forest Tent Caterpillar (Malacosoma disstria), Garman Quaker (Orthosia garmani), gray-edged hypena (Hypena madefactalis), Greater Red Dart (Abagrotis alternata), Gypsy moth (Lymantria dispar), habilis underwing (Catocala habilis), hag moth (Phobetron pithecium), Hickory shuckworm (Cydia caryana), Hickory Tussock Moth (Lophocampa caryae), Homohadena infixa, juvenile underwing (Catocala subnata), leaf crumpler moth (Acrobasis indigenella), Luna moth (Actias luna), maple looper moth (Parallelia bistriaris), Newlywed Underwing (Catocala neogama), Nites betulella, Norman's Quaker (Crocigrapha normani), Old Wife Underwing (Catocala palaeogama), One-spotted variant moth (Hypagyrtis unipunctata), Orthosia revicta, pecan bud moth (Gretchena bolliana), pecan cigar casebearer (Coleophora laticornella), pecan leaf casebearer (Acrobasis juglandis), pecan leafminer (Cameraria caryaefoliella), Penitent Underwing (Catocala piatrix), Polyphemus moth (Antheraea polyphemus), Pyrrhia sp., Red-bordered Emerald (Nemoria bistriaria), Red-humped caterpillar moth (Schizura concinna), Regal Moth (Citheronia regalis), Sabulodes caberata, Sad Underwing (Catocala maestosa), Serene Underwing (Catocala serena), skiff moth (Prolimacodes badia), Sleeping Baileya (Baileya dormitans), spiny looper moth (Phigalia titea), Splendid Royal Moth (Citheronia splendens), Spring cankerworm (Paleacrita vernata), Stigmella juglandifoliella, Variable Oakleaf Caterpillar Moth (Lochmaeus manteo), variegated midget (Elaphria versicolor), Virginia Tiger Moth (Spilosoma virginica), Walnut Leafroller Moth (Acrobasis demotella), walnut spanworm moth (Phigalia plumogeraria), Walnut Sphinx (Amorpha juglandis), Western tussock moth (Orgyia vetusta), White-blotched Heterocampa (Heterocampa umbrata), White-marked Tussock Moth (Orgyia leucostigma), Widow Underwing (Catocala vidua), Yellow-Banded Underwing (Catocala retecta), Yellownecked caterpillar (Datana ministra), Yellownecked caterpillar (Datana integerrima), Banded Hairstreak (Satyrium calanus)

Soil Requirements

Soil Type:
rich, well-drained loamy soil
pH:
6.0 - 7.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
consistently moist
Notes:
prefers deep, fertile soils in river valleys

Germination Information

Pre-treatment: Seeds are sown outdoors in the fall for natural stratification or cold stratified for 210 to 570 days. Some protocols suggest using a fungicide and endomycorrhizae before sowing.

Establishment: Seeds are collected from various locations, including national parks and local collectors. The plant is found throughout the eastern United States and in temperate deciduous forests of North America. There are variations in the protocols regarding seed treatment and sowing techniques.

Source: npn.rngr.net